Quarterly report pursuant to Section 13 or 15(d)

DEBT AND FINANCING ARRANGEMENTS - Carrying Value of Outstanding Debt (Detail)

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DEBT AND FINANCING ARRANGEMENTS - Carrying Value of Outstanding Debt (Detail) - USD ($)
Sep. 30, 2020
Mar. 24, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 25,869,000,000    
Total debt 25,718,000,000   $ 25,238,000,000
Less current maturities (2,382,000,000)   (3,420,000,000)
Long-Term Debt and Finance Leases 23,336,000,000   21,818,000,000
Commercial Paper      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount 1,202,000,000    
Total debt 1,202,000,000   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 $ 1,516,000,000   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 $ 700,000,000   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 $ 1,031,000,000   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 $ 599,000,000   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 $ 995,000,000   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 $ 993,000,000   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 $ 1,231,000,000   0
Senior notes | Floating-rate senior notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount 350,000,000    
Total debt 350,000,000   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 1,039,000,000    
Total debt 1,027,000,000   1,028,000,000
Senior notes | 8.375% debentures      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 0    
Debt instrument, stated interest rate 8.375%    
Total debt $ 0   426,000,000
Senior notes | 8.375% debentures      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 276,000,000    
Debt instrument, stated interest rate 8.375%    
Total debt $ 281,000,000   281,000,000
Senior notes | Canadian senior note 2.125%      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 560,000,000    
Debt instrument, stated interest rate 2.125%    
Total debt $ 558,000,000   571,000,000
Pound Sterling notes | 5.500% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 86,000,000    
Debt instrument, stated interest rate 5.50%    
Total debt $ 85,000,000   86,000,000
Pound Sterling notes | 5.125% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 585,000,000    
Debt instrument, stated interest rate 5.125%    
Total debt $ 554,000,000   566,000,000
Euro Senior Notes | 0.375% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 820,000,000    
Debt instrument, stated interest rate 0.375%    
Total debt $ 816,000,000   779,000,000
Euro Senior Notes | 1.625% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 820,000,000    
Debt instrument, stated interest rate 1.625%    
Total debt $ 816,000,000   779,000,000
Euro Senior Notes | 1.000% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 585,000,000    
Debt instrument, stated interest rate 1.00%    
Total debt $ 582,000,000   556,000,000
Euro Senior Notes | 1.500% notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 585,000,000    
Debt instrument, stated interest rate 1.50%    
Total debt $ 582,000,000   556,000,000
Euro Senior Notes | Floating-rate senior notes      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount 0    
Total debt 0   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 5,000,000    
Total debt $ 5,000,000   $ 8,000,000