Accounting Policies and Supplemental Disclosures - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounting Policies [Abstract]
Cash paid for interest on debt, net of capitalized interest	$ 954	$ 349	$ 1,356	$ 628	$ 2,289	$ 1,271
Cash paid for operating leases	2,528	2,088	4,995	4,455	9,173	7,960
Cash paid for interest on finance leases	77	95	158	202	330	437
Cash paid for interest on financing obligations	41	55	100	113	194	198
Cash paid for income taxes, net of refunds	3,735	3,145	4,354	3,598	6,791	4,682
Assets acquired under operating leases	4,104	5,101	7,730	7,276	19,254	23,531
Property and equipment acquired under finance leases, net of remeasurements and modifications	240	61	248	227	696	3,579
Property and equipment recognized during the construction period of build-to-suit lease arrangements	84	986	215	2,351	1,051	6,117
Property and equipment derecognized after the construction period of build-to-suit lease arrangements, with the associated leases recognized as operating	$ 0	$ 1,079	$ 720	$ 1,112	$ 4,766	$ 1,243