Long-Term Debt (Detail) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022 |
Debt Instrument [Line Items] | | |
Commercial paper | $ 1,002,000,000 | $ 871,000,000 |
Credit Facility | 0 | 0 |
Finance lease obligations | 137,000,000 | 139,000,000 |
Other | 56,000,000 | 92,000,000 |
Total debt | 10,657,000,000 | 10,064,000,000 |
Less current portion | (358,000,000) | (684,000,000) |
Long-term debt, noncurrent | 10,299,000,000 | 9,380,000,000 |
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 348,000,000 | 348,000,000 |
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.80% | |
Senior notes, face amount | $ 350,000,000 | |
Effective interest rate | 4% | |
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 747,000,000 | 747,000,000 |
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.10% | |
Senior notes, face amount | $ 750,000,000 | |
Effective interest rate | 3.30% | |
Series U Notes, interest rate of 3.1%, face amount of $291, matured February 15, 2023 (effective interest rate of 3.1%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 0 | 291,000,000 |
Series U Notes, interest rate of 3.1%, face amount of $291, matured February 15, 2023 (effective interest rate of 3.1%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.10% | |
Senior notes, face amount | $ 291,000,000 | |
Effective interest rate | 3.10% | |
Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 324,000,000 | 324,000,000 |
Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.80% | |
Senior notes, face amount | $ 318,000,000 | |
Effective interest rate | 2.80% | |
Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 289,000,000 | 289,000,000 |
Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4.50% | |
Senior notes, face amount | $ 278,000,000 | |
Effective interest rate | 4.10% | |
Series X Notes, interest rate of 4.0%, face amount of $450, maturing April 15, 2028 (effective interest rate of 4.2%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 446,000,000 | 446,000,000 |
Series X Notes, interest rate of 4.0%, face amount of $450, maturing April 15, 2028 (effective interest rate of 4.2%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4% | |
Senior notes, face amount | $ 450,000,000 | |
Effective interest rate | 4.20% | |
Series Z Notes, interest rate of 4.2%, face amount of $350, maturing December 1, 2023 (effective interest rate of 4.4%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 350,000,000 | 349,000,000 |
Series Z Notes, interest rate of 4.2%, face amount of $350, maturing December 1, 2023 (effective interest rate of 4.4%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4.20% | |
Senior notes, face amount | $ 350,000,000 | |
Effective interest rate | 4.40% | |
Series AA Notes, interest rate of 4.7%, face amount of $300, maturing December 1, 2028 (effective interest rate of 4.8%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 298,000,000 | 298,000,000 |
Series AA Notes, interest rate of 4.7%, face amount of $300, maturing December 1, 2028 (effective interest rate of 4.8%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4.70% | |
Senior notes, face amount | $ 300,000,000 | |
Effective interest rate | 4.80% | |
Series CC Notes, interest rate of 3.6%, face amount of $550, maturing April 15, 2024 (effective interest rate of 3.9%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 535,000,000 | 531,000,000 |
Series CC Notes, interest rate of 3.6%, face amount of $550, maturing April 15, 2024 (effective interest rate of 3.9%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.60% | |
Senior notes, face amount | $ 550,000,000 | |
Effective interest rate | 3.90% | |
Series EE Notes, interest rate of 5.8%, face amount of $600, maturing May 1, 2025 (effective interest rate of 6.0%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 597,000,000 | 596,000,000 |
Series EE Notes, interest rate of 5.8%, face amount of $600, maturing May 1, 2025 (effective interest rate of 6.0%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 5.80% | |
Senior notes, face amount | $ 600,000,000 | |
Effective interest rate | 6% | |
Series FF Notes, interest rate of 4.6%, face amount of $1,000, maturing June 15, 2030 (effective interest rate of 4.8%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 988,000,000 | 988,000,000 |
Series FF Notes, interest rate of 4.6%, face amount of $1,000, maturing June 15, 2030 (effective interest rate of 4.8%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4.60% | |
Senior notes, face amount | $ 1,000,000,000 | |
Effective interest rate | 4.80% | |
Series GG Notes, interest rate of 3.5%, face amount of $1,000, maturing October 15, 2032 (effective interest rate of 3.7%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 987,000,000 | 987,000,000 |
Series GG Notes, interest rate of 3.5%, face amount of $1,000, maturing October 15, 2032 (effective interest rate of 3.7%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 3.50% | |
Senior notes, face amount | $ 1,000,000,000 | |
Effective interest rate | 3.70% | |
Series HH Notes, interest rate of 2.9%, face amount of $1,100, maturing April 15, 2031 (effective interest rate of 3.0%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 1,091,000,000 | 1,090,000,000 |
Series HH Notes, interest rate of 2.9%, face amount of $1,100, maturing April 15, 2031 (effective interest rate of 3.0%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 2.90% | |
Senior notes, face amount | $ 1,100,000,000 | |
Effective interest rate | 3% | |
Series II Notes, interest rate of 2.8%, face amount of $700, maturing October 15, 2033 (effective interest rate of 2.8%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 694,000,000 | 694,000,000 |
Series II Notes, interest rate of 2.8%, face amount of $700, maturing October 15, 2033 (effective interest rate of 2.8%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 2.80% | |
Senior notes, face amount | $ 700,000,000 | |
Effective interest rate | 2.80% | |
Series JJ Notes, interest rate of 5.0%, face amount of $1,000, maturing October 15, 2027 (effective interest rate of 5.4%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 985,000,000 | 984,000,000 |
Series JJ Notes, interest rate of 5.0%, face amount of $1,000, maturing October 15, 2027 (effective interest rate of 5.4%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 5% | |
Senior notes, face amount | $ 1,000,000,000 | |
Effective interest rate | 5.40% | |
Series KK Notes, interest rate of 4.9%, face amount of $800, maturing April 15, 2029 (effective interest rate of 5.3%) | | |
Debt Instrument [Line Items] | | |
Senior notes | $ 783,000,000 | $ 0 |
Series KK Notes, interest rate of 4.9%, face amount of $800, maturing April 15, 2029 (effective interest rate of 5.3%) | Senior Notes | | |
Debt Instrument [Line Items] | | |
Interest rate | 4.90% | |
Senior notes, face amount | $ 800,000,000 | |
Effective interest rate | 5.30% | |