Capital Stock - Accumulated Other Comprehensive Income (Loss) (Details) - 2.5% (€650 million) Senior Notes Due 2022 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation losses, net of tax	$ 15	$ 69
Foreign currency translation losses, before tax	$ 22	$ 90
Debt, interest rate	2.50%	2.50%	2.50%