Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Total borrowings at face value		$ 20,361	$ 28,493
Adjustments to book value:
Unamortized premium, net		1,289	670
Debt issuance costs		(88)	(135)
Net book value of debt		21,562	29,028
Long-term finance leases		543	504
Current finance leases		97	85
Total debt and finance leases		22,202	29,617
Less current maturities of financing leases		(97)	(85)
Less current maturities of long-term debt		(362)	(101)
Long-term debt, net	[1]	$ 21,743	$ 29,431

[1] Included $543 million and $504 million of finance lease liabilities as of June 30, 2022 and December 31, 2021, respectively.