Financial Instruments - Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Net unamortized discounts, premiums and debt issuance costs	$ (90)	$ (121)
Total long-term debt, carried at historical proceeds, as adjusted	57,506	61,538
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt, principal amount	57,193	60,982
Net fair value adjustments related to hedging and purchase accounting	773	1,039
Net unamortized discounts, premiums and debt issuance costs	(460)	(483)
Total long-term debt, carried at historical proceeds, as adjusted	$ 57,506	$ 61,538