Carrying Value of Outstanding Debt (Detail) - USD ($)
|
Mar. 31, 2020 |
Mar. 24, 2020 |
Dec. 31, 2019 |
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 28,750,000,000
|
|
|
| Debt instrument, stated interest rate |
8.375%
|
|
|
| Total debt |
$ 28,601,000,000
|
|
$ 25,238,000,000
|
| Less current maturities |
(4,405,000,000)
|
|
(3,420,000,000)
|
| Long-Term Debt and Finance Leases |
24,196,000,000
|
|
21,818,000,000
|
| Commercial Paper |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
3,256,000,000
|
|
|
| Total debt |
3,245,000,000
|
|
3,234,000,000
|
| Senior notes | 3.125% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,500,000,000
|
|
|
| Debt instrument, stated interest rate |
3.125%
|
|
|
| Total debt |
$ 1,530,000,000
|
|
1,524,000,000
|
| Senior notes | 2.050% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 700,000,000
|
|
|
| Debt instrument, stated interest rate |
2.05%
|
|
|
| Total debt |
$ 699,000,000
|
|
699,000,000
|
| Senior notes | 2.450% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,000,000,000
|
|
|
| Debt instrument, stated interest rate |
2.45%
|
|
|
| Total debt |
$ 1,033,000,000
|
|
1,003,000,000
|
| Senior notes | 2.350% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 600,000,000
|
|
|
| Debt instrument, stated interest rate |
2.35%
|
|
|
| Total debt |
$ 598,000,000
|
|
598,000,000
|
| Senior notes | 2.500% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,000,000,000
|
|
|
| Debt instrument, stated interest rate |
2.50%
|
|
|
| Total debt |
$ 996,000,000
|
|
995,000,000
|
| Senior notes | 2.800% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 500,000,000
|
|
|
| Debt instrument, stated interest rate |
2.80%
|
|
|
| Total debt |
$ 497,000,000
|
|
497,000,000
|
| Senior notes | 2.200% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 400,000,000
|
|
|
| Debt instrument, stated interest rate |
2.20%
|
|
|
| Total debt |
$ 398,000,000
|
|
398,000,000
|
| Senior notes | 3.900% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,000,000,000
|
$ 1,000,000,000.0
|
|
| Debt instrument, stated interest rate |
3.90%
|
3.90%
|
|
| Total debt |
$ 994,000,000
|
|
0
|
| Senior notes | 2.400% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 500,000,000
|
|
|
| Debt instrument, stated interest rate |
2.40%
|
|
|
| Total debt |
$ 498,000,000
|
|
498,000,000
|
| Senior notes | 3.050% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,000,000,000
|
|
|
| Debt instrument, stated interest rate |
3.05%
|
|
|
| Total debt |
$ 992,000,000
|
|
992,000,000
|
| Senior notes | 3.400% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 750,000,000
|
|
|
| Debt instrument, stated interest rate |
3.40%
|
|
|
| Total debt |
$ 745,000,000
|
|
745,000,000
|
| Senior notes | 2.500% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 400,000,000
|
|
|
| Debt instrument, stated interest rate |
2.50%
|
|
|
| Total debt |
$ 397,000,000
|
|
397,000,000
|
| Senior notes | 4.450% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 750,000,000
|
$ 750,000,000
|
|
| Debt instrument, stated interest rate |
4.45%
|
4.45%
|
|
| Total debt |
$ 743,000,000
|
|
0
|
| Senior notes | 6.200% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,500,000,000
|
|
|
| Debt instrument, stated interest rate |
6.20%
|
|
|
| Total debt |
$ 1,483,000,000
|
|
1,483,000,000
|
| Senior notes | 5.200% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 500,000,000
|
$ 500,000,000
|
|
| Debt instrument, stated interest rate |
5.20%
|
5.20%
|
|
| Total debt |
$ 493,000,000
|
|
0
|
| Senior notes | 4.875% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 500,000,000
|
|
|
| Debt instrument, stated interest rate |
4.875%
|
|
|
| Total debt |
$ 490,000,000
|
|
490,000,000
|
| Senior notes | 3.625% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 375,000,000
|
|
|
| Debt instrument, stated interest rate |
3.625%
|
|
|
| Total debt |
$ 368,000,000
|
|
368,000,000
|
| Senior notes | 3.400% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 500,000,000
|
|
|
| Debt instrument, stated interest rate |
3.40%
|
|
|
| Total debt |
$ 491,000,000
|
|
491,000,000
|
| Senior notes | 3.750% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,150,000,000
|
|
|
| Debt instrument, stated interest rate |
3.75%
|
|
|
| Total debt |
$ 1,137,000,000
|
|
1,136,000,000
|
| Senior notes | 4.250% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 750,000,000
|
|
|
| Debt instrument, stated interest rate |
4.25%
|
|
|
| Total debt |
$ 742,000,000
|
|
742,000,000
|
| Senior notes | 3.400% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 700,000,000
|
|
|
| Debt instrument, stated interest rate |
3.40%
|
|
|
| Total debt |
$ 688,000,000
|
|
688,000,000
|
| Senior notes | 5.300% senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 1,250,000,000
|
$ 1,250,000,000
|
|
| Debt instrument, stated interest rate |
5.30%
|
5.30%
|
|
| Total debt |
$ 1,230,000,000
|
|
0
|
| Senior notes | Floating-rate senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
350,000,000
|
|
|
| Total debt |
349,000,000
|
|
349,000,000
|
| Senior notes | Floating-rate senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
400,000,000
|
|
|
| Total debt |
399,000,000
|
|
399,000,000
|
| Senior notes | Floating-rate senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
500,000,000
|
|
|
| Total debt |
499,000,000
|
|
499,000,000
|
| Senior notes | Floating-rate senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
1,041,000,000
|
|
|
| Total debt |
1,028,000,000
|
|
1,028,000,000
|
| Senior notes | 8.375% debentures |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 424,000,000
|
|
|
| Debt instrument, stated interest rate |
8.375%
|
|
|
| Total debt |
$ 424,000,000
|
|
426,000,000
|
| Senior notes | 8.375% debentures |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
276,000,000
|
|
|
| Total debt |
281,000,000
|
|
281,000,000
|
| Senior notes | Canadian senior note 2.125% |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 529,000,000
|
|
|
| Debt instrument, stated interest rate |
2.125%
|
|
|
| Total debt |
$ 527,000,000
|
|
571,000,000
|
| Capital Lease Obligations |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
500,000,000
|
|
|
| Total debt |
500,000,000
|
|
498,000,000
|
| Pound Sterling notes | 5.500% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 82,000,000
|
|
|
| Debt instrument, stated interest rate |
5.50%
|
|
|
| Total debt |
$ 81,000,000
|
|
86,000,000
|
| Pound Sterling notes | 5.125% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 562,000,000
|
|
|
| Debt instrument, stated interest rate |
5.125%
|
|
|
| Total debt |
$ 533,000,000
|
|
566,000,000
|
| Euro Senior Notes | 0.375% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 767,000,000
|
|
|
| Debt instrument, stated interest rate |
0.375%
|
|
|
| Total debt |
$ 764,000,000
|
|
779,000,000
|
| Euro Senior Notes | 1.625% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 767,000,000
|
|
|
| Debt instrument, stated interest rate |
1.625%
|
|
|
| Total debt |
$ 764,000,000
|
|
779,000,000
|
| Euro Senior Notes | 1.000% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 548,000,000
|
|
|
| Debt instrument, stated interest rate |
1.00%
|
|
|
| Total debt |
$ 545,000,000
|
|
556,000,000
|
| Euro Senior Notes | 1.500% notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
$ 548,000,000
|
|
|
| Debt instrument, stated interest rate |
1.50%
|
|
|
| Total debt |
$ 545,000,000
|
|
556,000,000
|
| Euro Senior Notes | Floating-rate senior notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
548,000,000
|
|
|
| Total debt |
548,000,000
|
|
559,000,000
|
| Facility notes and bonds |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
320,000,000
|
|
|
| Total debt |
320,000,000
|
|
320,000,000
|
| Other debt |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Debt Instrument, Face Amount |
7,000,000
|
|
|
| Total debt |
$ 7,000,000
|
|
$ 8,000,000
|