Special Charges - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jul. 02, 2024 |
Feb. 22, 2024 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Special Charges [Line Items] | ||||||
| (Gains) losses on sale of assets and other special charges | $ (5) | $ 28 | $ 44 | $ 88 | ||
| Nonoperating unrealized (gains) losses on investments, net | 90 | 54 | 160 | (54) | ||
| Nonoperating debt extinguishment and modification fees | 75 | 0 | 110 | 11 | ||
| Labor contract ratification bonuses | 0 | $ 1 | 0 | 814 | ||
| Prepayment of outstanding principal amount | 8,792 | 3,423 | ||||
| Secured Debt | Term Loan Facility | ||||||
| Special Charges [Line Items] | ||||||
| Nonoperating debt extinguishment and modification fees | $ 75 | 75 | ||||
| Prepayment of outstanding principal amount | $ 1,800 | |||||
| Secured Debt | Term Loan Due 2021 | ||||||
| Special Charges [Line Items] | ||||||
| Nonoperating debt extinguishment and modification fees | 11 | |||||
| Refinancing charges | $ 35 | |||||
| Prepayment of outstanding principal amount | $ 1,370 | $ 1,000 | ||||