Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 303	$ 301
Income taxes paid	399	290
Distribution of nonmonetary assets (see Note 10)	111	0
Software obtained under financing arrangements	61	68
Right-of-use assets obtained in exchange for lease liabilities - operating leases	98	71
Right-of-use assets obtained in exchange for lease liabilities - finance leases	$ 69	$ 95