Shareholders' Equity (Deficiency) (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (35)
Other Comprehensive Loss	0	$ (4)
Ending balance	(35)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(36)	(31)
Other Comprehensive Loss	0	(4)
Ending balance	(36)	(35)
Defined Benefit Pension
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	1	(12)
Other Comprehensive Loss	0	0
Ending balance	1	(12)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(35)	(43)
Ending balance	$ (35)	$ (47)