Debt - Schedule of Debt Balances and Activity (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Debt Balances and Activity [Roll Forward]
Long-term debt, proceeds from issuances and borrowings	$ 6,891
Total Debt
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	86,282
Proceeds from issuances and borrowings	6,891
Redemptions and Repayments	(9,175)
Reclassifications	0
Other	(332)
Total debt, ending balance	83,666
Third Party
Debt Balances and Activity [Roll Forward]
Short-term debt, proceeds from issuances and borrowings	0
Long-term debt, proceeds from issuances and borrowings	6,891
Third Party \| Short-term debt
Debt Balances and Activity [Roll Forward]
Other	3
Third Party \| Long-term debt
Debt Balances and Activity [Roll Forward]
Other	(335)
Third Party \| Total Debt
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	84,784
Proceeds from issuances and borrowings	6,891
Redemptions and Repayments	(7,677)
Reclassifications	0
Other	(332)
Total debt, ending balance	83,666
Affiliates
Debt Balances and Activity [Roll Forward]
Proceeds from issuances and borrowings	0
Affiliates \| Long-term debt
Debt Balances and Activity [Roll Forward]
Other	0
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Debt Balances and Activity [Roll Forward]
Reclassifications	(6,167)
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:LongTermDebtNoncurrent \| Affiliates
Debt Balances and Activity [Roll Forward]
Reclassifications	0
Location, Statement of Financial Position, Activity, Accrual [Axis]: us-gaap:ShortTermBorrowings \| Third Party
Debt Balances and Activity [Roll Forward]
Reclassifications	6,167
Balance Sheet Location [Axis]: us-gaap:LongTermDebtNoncurrent \| Third Party
Debt Balances and Activity [Roll Forward]
Long-term debt, beginning balance	79,649
Redemptions and Repayments	(2,715)
Long-term debt, ending balance	77,323
Balance Sheet Location [Axis]: us-gaap:LongTermDebtNoncurrent \| Affiliates
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance	1,498
Redemptions and Repayments	(1,498)
Total debt, ending balance	0
Balance Sheet Location [Axis]: us-gaap:ShortTermBorrowings \| Third Party
Debt Balances and Activity [Roll Forward]
Short-term debt, beginning balance	5,135
Redemptions and Repayments	(4,962)
Short-term debt, ending balance	$ 6,343

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Debt Instrument, Reclassifications

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Amount of increase (decrease) in debt instruments, classified as other.

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Face (par) amount of the original debt instrument that was repurchased.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

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