Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 563	$ 533
Income taxes paid	596	555
Treasury stock purchases settled after the balance sheet date	11	0
Distribution of nonmonetary assets (see Note 10)	111	0
Software obtained under financing arrangements	59	143
Right-of-use assets obtained in exchange for lease liabilities - operating leases	109	75
Right-of-use assets obtained in exchange for lease liabilities - finance leases	$ 221	$ 183