Leases - Operating and Finance Lease Liability Reconciliation (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Total operating lease liabilities	$ 66,144	$ 66,269
Total finance lease liabilities	23,094	25,866
Gross lease liabilities	89,238	92,135
Imputed interest - operating leases	(7,858)	(7,939)
Imputed interest - finance leases	(2,167)	(2,113)
Imputed interest	(10,025)	(10,052)
Present value of operating leases	58,286	58,330
Present value of finance leases	20,927	23,753
Present value of lease liabilities	$ 79,213	$ 82,083
Operating lease liability, current, location	Accrued expenses and other	Accrued expenses and other
Finance lease liability, current location	Accrued expenses and other	Accrued expenses and other
Current portion of operating lease liabilities	$ (6,640)	$ (6,349)
Current portion of finance lease liabilities	(6,842)	(8,083)
Current portion of lease liabilities	$ (13,482)	$ (14,432)
Operating lease liability, long-term, location	Total long-term lease liabilities	Total long-term lease liabilities
Finance lease liability, long-term, location	Total long-term lease liabilities	Total long-term lease liabilities
Total long-term operating lease liabilities	$ 51,646	$ 51,981
Total long-term finance lease liabilities	14,085	15,670
Total long-term lease liabilities	$ 65,731	$ 67,651