Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt, due within one year	$ 4,819	$ 4,340
Long-term debt, due after one year	12,676	13,230
Total long-term debt	17,495	17,570
Unsecured debt
Debt Instrument [Line Items]
Long-term debt, due within one year	2,408	1,409
Long-term debt, due after one year	8,654	9,015
Total long-term debt	11,062	10,424
Secured debt
Debt Instrument [Line Items]
Long-term debt, due within one year	2,411	2,931
Long-term debt, due after one year	4,022	4,215
Total long-term debt	$ 6,433	$ 7,146