(Schedule of Unrecognized Tax Benefits Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Balance at January 1	$ (143)	$ (166)	$ (172)
(Additions) reductions for tax positions related to current year	(13)	(10)	(5)
(Additions) for tax positions related to prior years	(23)	(10)	(3)
Reductions for tax positions related to prior years	1	30	5
Settlements	10	13	7
Expiration of statutes of limitations	1	1	2
Currency translation adjustment	(1)	(1)	0
Balance at December 31	$ (166)	$ (143)	$ (166)