Leases (Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 221	$ 207	$ 202
Operating cash flows from finance leases	4	5	6
Financing cash flows from finance leases	69	53	47
Leased assets obtained in exchange for new operating lease liabilities (1)	299	202	201
Leased assets obtained in exchange for new finance lease liabilities	$ 66	$ 64	$ 55