Summary of Debt Obligations (Detail) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Debt Disclosure [Line Items] | |||||||||||
| Amounts outstanding | $ 40,145 | [1] | $ 38,616 | ||||||||
| Fair value adjustments | [2] | (15) | (40) | ||||||||
| Deferred debt costs | (157) | (152) | |||||||||
| Total debt obligations | 39,973 | 38,424 | |||||||||
| Commercial Paper | 798 | 790 | |||||||||
| Current maturities of long term debt | 725 | ||||||||||
| Total U.S. Dollar | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Amounts outstanding | $ 24,531 | $ 25,424 | |||||||||
| Total U.S. Dollar | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 4.40% | 4.20% | ||||||||
| Amounts outstanding | $ 23,233 | $ 24,134 | |||||||||
| Total U.S. Dollar | Floating | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 5.10% | 5.70% | ||||||||
| Amounts outstanding | $ 1,298 | $ 1,290 | |||||||||
| Total Euro | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Amounts outstanding | $ 11,486 | $ 9,186 | |||||||||
| Total Euro | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 2.60% | 2.50% | ||||||||
| Amounts outstanding | $ 11,486 | $ 8,875 | |||||||||
| Total Euro | Floating | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 0.00% | 5.30% | ||||||||
| Amounts outstanding | $ 0 | $ 311 | |||||||||
| Total Australian Dollar | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Amounts outstanding | $ 400 | $ 371 | |||||||||
| Total Australian Dollar | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 3.70% | 3.70% | ||||||||
| Amounts outstanding | $ 400 | $ 371 | |||||||||
| Total Australian Dollar | Floating | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 0.00% | 0.00% | ||||||||
| Amounts outstanding | $ 0 | ||||||||||
| Total British Pounds Sterling | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 4.10% | 4.10% | ||||||||
| Amounts outstanding | $ 1,679 | $ 1,559 | |||||||||
| Total Canadian Dollar | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 4.50% | 4.00% | ||||||||
| Amounts outstanding | $ 1,275 | $ 1,390 | |||||||||
| Total Japanese Yen | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | [3] | 2.90% | 2.90% | ||||||||
| Amounts outstanding | $ 80 | $ 79 | |||||||||
| Total Other Currencies | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Amounts outstanding | [4] | $ 694 | $ 607 | ||||||||
| Total Other Currencies | Fixed | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | 1.20% | 1.20% | |||||||||
| Amounts outstanding | $ 694 | $ 605 | |||||||||
| Total Other Currencies | Floating | |||||||||||
| Debt Disclosure [Line Items] | |||||||||||
| Interest rates | 0.00% | 0.70% | |||||||||
| Amounts outstanding | $ 2 | ||||||||||
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