DEBT AND FINANCING ARRANGEMENTS - Carrying Value of Debt Obligations (Detail)
CAD in Millions |
12 Months Ended |
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Dec. 31, 2017
USD ($)
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Dec. 31, 2017
EUR (€)
|
Nov. 30, 2017
USD ($)
|
Nov. 09, 2017
USD ($)
|
Nov. 08, 2017
USD ($)
|
Nov. 08, 2017
EUR (€)
|
Oct. 01, 2017 |
May 18, 2017
USD ($)
|
May 18, 2017
CAD
|
May 16, 2017
USD ($)
|
Mar. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 24,761,000,000
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| Long-term Debt |
23,886,000,000
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| Total debt |
24,289,000,000
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$ 16,075,000,000
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| Less current maturities |
(4,011,000,000)
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(3,681,000,000)
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| Long-term debt, excluding current maturities |
20,278,000,000
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12,394,000,000
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| Commercial paper |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 3,203,000,000
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| Maturity |
Dec. 31, 2018
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| Total debt |
$ 3,203,000,000
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3,250,000,000
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| Senior notes | 1.125% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 375,000,000
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| Debt instrument, stated interest rate percentage |
1.125%
|
1.125%
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1.125%
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| Maturity - Maximum Date |
Jan. 01, 2017
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| Maturity |
Dec. 31, 2017
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| Total debt |
$ 0
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374,000,000
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| Senior notes | 5.50% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 750,000,000
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| Debt instrument, stated interest rate percentage |
5.50%
|
5.50%
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| Maturity - Maximum Date |
Jan. 01, 2018
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| Maturity |
Dec. 31, 2018
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| Total debt |
$ 751,000,000
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|
769,000,000
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| Senior notes | 5.125% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,000,000,000
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| Debt instrument, stated interest rate percentage |
5.125%
|
5.125%
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| Maturity - Maximum Date |
Jan. 01, 2019
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| Maturity |
Dec. 31, 2019
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| Total debt |
$ 1,019,000,000
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1,043,000,000
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| Senior notes | 3.125% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,500,000,000
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| Debt instrument, stated interest rate percentage |
3.125%
|
3.125%
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| Maturity - Maximum Date |
Jan. 01, 2021
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| Maturity |
Dec. 31, 2021
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| Total debt |
$ 1,549,000,000
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1,584,000,000
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| Senior notes | 2.050% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 700,000,000
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$ 700,000,000
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| Debt instrument, stated interest rate percentage |
2.05%
|
2.05%
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|
2.05%
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| Maturity |
Apr. 30, 2021
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| Total debt |
$ 696,000,000
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0
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| Senior notes | 2.45% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,000,000,000
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| Debt instrument, stated interest rate percentage |
2.45%
|
2.45%
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| Maturity - Maximum Date |
Jan. 01, 2022
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| Maturity |
Dec. 31, 2022
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| Total debt |
$ 979,000,000
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|
986,000,000
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| Senior notes | 2.350% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 600,000,000
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$ 600,000,000
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| Debt instrument, stated interest rate percentage |
2.35%
|
2.35%
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2.35%
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| Maturity |
May 31, 2022
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| Total debt |
$ 597,000,000
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0
|
| Senior notes | 2.500% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,000,000,000
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$ 1,000,000,000
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| Debt instrument, stated interest rate percentage |
2.50%
|
2.50%
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|
2.50%
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| Maturity |
Apr. 30, 2023
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| Total debt |
$ 992,000,000
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0
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| Senior notes | 2.800% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 500,000,000
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|
$ 500,000,000
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| Debt instrument, stated interest rate percentage |
2.80%
|
2.80%
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|
2.80%
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| Maturity |
Nov. 30, 2024
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| Total debt |
$ 495,000,000
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0
|
| Senior notes | 2.40% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 500,000,000
|
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| Debt instrument, stated interest rate percentage |
2.40%
|
2.40%
|
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| Maturity |
Dec. 31, 2026
|
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| Total debt |
$ 497,000,000
|
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|
497,000,000
|
| Senior notes | 3.050% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,000,000,000
|
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|
$ 1,000,000,000
|
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| Debt instrument, stated interest rate percentage |
3.05%
|
3.05%
|
|
3.05%
|
|
|
|
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| Maturity |
Nov. 30, 2027
|
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| Total debt |
$ 990,000,000
|
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0
|
| Senior notes | 6.20% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 1,500,000,000
|
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| Debt instrument, stated interest rate percentage |
6.20%
|
6.20%
|
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| Maturity |
Dec. 31, 2038
|
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| Total debt |
$ 1,482,000,000
|
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|
1,481,000,000
|
| Senior notes | 4.875% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 500,000,000
|
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| Debt instrument, stated interest rate percentage |
4.875%
|
4.875%
|
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| Maturity |
Dec. 31, 2040
|
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| Total debt |
$ 489,000,000
|
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|
489,000,000
|
| Senior notes | 3.625% senior notes |
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| Debt Instrument [Line Items] |
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| Principal Amount |
$ 375,000,000
|
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| Debt instrument, stated interest rate percentage |
3.625%
|
3.625%
|
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|
|
|
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| Maturity |
Dec. 31, 2042
|
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|
|
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| Total debt |
$ 368,000,000
|
|
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|
|
|
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|
367,000,000
|
| Senior notes | 3.40% senior notes |
|
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|
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|
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| Debt Instrument [Line Items] |
|
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|
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|
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| Principal Amount |
$ 500,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
3.40%
|
3.40%
|
|
|
|
|
|
|
|
|
|
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| Maturity |
Dec. 31, 2046
|
|
|
|
|
|
|
|
|
|
|
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| Total debt |
$ 491,000,000
|
|
|
|
|
|
|
|
|
|
|
491,000,000
|
| Senior notes | 3.750% senior notes |
|
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| Debt Instrument [Line Items] |
|
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|
|
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| Principal Amount |
$ 1,150,000,000
|
|
|
$ 1,150,000,000.00
|
|
|
|
|
|
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|
| Debt instrument, stated interest rate percentage |
3.75%
|
3.75%
|
|
3.75%
|
|
|
|
|
|
|
|
|
| Maturity |
Nov. 30, 2047
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 1,135,000,000
|
|
|
|
|
|
|
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|
0
|
| Senior notes | Floating rate senior notes maturing 2021 |
|
|
|
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|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
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|
|
|
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|
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|
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| Principal Amount |
$ 350,000,000
|
|
|
$ 350,000,000
|
|
|
|
|
|
|
|
|
| Maturity |
Apr. 30, 2021
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 348,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Senior notes | Floating rate senior notes maturing 2022 |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
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| Principal Amount |
$ 400,000,000
|
|
|
|
|
|
|
|
|
$ 400,000,000
|
|
|
| Maturity |
May 31, 2022
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 398,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Senior notes | Floating rate senior notes maturing 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 500,000,000
|
|
|
$ 500,000,000
|
|
|
|
|
|
|
|
|
| Maturity |
Apr. 30, 2023
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 496,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Senior notes | Floating rate senior notes maturing 2049-2067 |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 1,043,000,000
|
|
$ 64
|
|
|
|
|
|
|
|
$ 147
|
|
| Maturity - Minimum Date |
Dec. 31, 2049
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Maximum Date |
Dec. 31, 2067
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 1,032,000,000
|
|
|
|
|
|
|
|
|
|
|
824,000,000
|
| Senior notes | 8.375% debentures Due 2020 |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 424,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
8.375%
|
8.375%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2020
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 447,000,000
|
|
|
|
|
|
|
|
|
|
|
461,000,000
|
| Senior notes | 8.375% debentures Due 2030 |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 276,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
8.375%
|
8.375%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2030
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 282,000,000
|
|
|
|
|
|
|
|
|
|
|
282,000,000
|
| Pound Sterling notes | 5.50% Pound Sterling Notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 90,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
5.50%
|
5.50%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2031
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 84,000,000
|
|
|
|
|
|
|
|
|
|
|
76,000,000
|
| Pound Sterling notes | 5.13% Pound Sterling Notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 614,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
5.125%
|
5.125%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2050
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 586,000,000
|
|
|
|
|
|
|
|
|
|
|
535,000,000
|
| Euro Senior Notes | 0.375% Euro Senior Notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 839,000,000
|
|
|
|
$ 815,000,000
|
€ 700,000,000
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
0.375%
|
0.375%
|
|
|
0.375%
|
0.375%
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2023
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 832,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Euro Senior Notes | 1.625% euro senior notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 839,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
1.625%
|
1.625%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2025
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 833,000,000
|
|
|
|
|
|
|
|
|
|
|
732,000,000
|
| Euro Senior Notes | 1.000% euro senior notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 599,000,000
|
€ 500,000,000
|
|
|
|
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
1.00%
|
1.00%
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Nov. 30, 2028
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 595,000,000
|
|
|
|
|
|
|
|
|
|
|
523,000,000
|
| Euro Senior Notes | 1.500% euro senior notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 599,000,000
|
|
|
|
$ 582,000,000
|
€ 500,000,000
|
|
|
|
|
|
|
| Debt instrument, stated interest rate percentage |
1.50%
|
1.50%
|
|
|
1.50%
|
1.50%
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2032
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 594,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Euro Senior Notes | Floating Rate Euro Senior Notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 599,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity |
Dec. 31, 2020
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 598,000,000
|
|
|
|
|
|
|
|
|
|
|
525,000,000
|
| Canadian Senior Notes | 2.125% canadian senior notes |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 597,000,000
|
|
|
|
|
|
|
$ 547,000,000
|
CAD 750
|
|
|
|
| Debt instrument, stated interest rate percentage |
2.125%
|
2.125%
|
|
|
|
|
|
2.125%
|
2.125%
|
|
|
|
| Maturity |
Dec. 31, 2024
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 593,000,000
|
|
|
|
|
|
|
|
|
|
|
0
|
| Capital lease obligations |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 500,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Minimum Date |
Dec. 31, 2018
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Maximum Date |
Dec. 31, 3005
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 500,000,000
|
|
|
|
|
|
|
|
|
|
|
447,000,000
|
| Facility notes and bonds |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 320,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Minimum Date |
Dec. 31, 2029
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Maximum Date |
Dec. 31, 2045
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 319,000,000
|
|
|
|
|
|
|
|
|
|
|
319,000,000
|
| Other debt |
|
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
| Principal Amount |
$ 19,000,000
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Minimum Date |
Dec. 31, 2018
|
|
|
|
|
|
|
|
|
|
|
|
| Maturity - Maximum Date |
Dec. 31, 2022
|
|
|
|
|
|
|
|
|
|
|
|
| Total debt |
$ 19,000,000
|
|
|
|
|
|
|
|
|
|
|
$ 20,000,000
|