Reclassifications from Accumulated Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended								9 Months Ended
	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021		Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022		Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,043		$ (119)	$ 2,547	$ (18)		$ 586	$ 497	$ 2,547		$ 497
Other comprehensive income	0	[1]			1	[1]	3		0	[1]	4	[1]
Ending balance	1,414		1,043	(119)	(286)		(18)	586	1,414		(286)
Accumulated other comprehensive income	450		1,173	(2,675)	(1,857)		(609)	80	(1,052)		(2,386)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(25)		(25)	(25)	(35)		(38)	(38)	(25)		(38)
Other comprehensive income before reclassifications									0
Amounts reclassified from other comprehensive income									0
Other comprehensive income					1		3		0
Ending balance	(25)		$ (25)	(25)	$ (34)		$ (35)	$ (38)	(25)		$ (34)
Pension and Other Postretirement
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				(11)					(11)
Other comprehensive income before reclassifications									0
Amounts reclassified from other comprehensive income									0
Other comprehensive income									0
Ending balance	(11)								(11)
Pension and Other Postretirement | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income									1
Foreign Currency
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				$ (14)					(14)
Other comprehensive income before reclassifications									0
Amounts reclassified from other comprehensive income									0
Other comprehensive income									0
Ending balance	$ (14)								$ (14)

[1] Settlement adjustment was less than $1 million for the three and nine months ended September 30, 2022. Settlement adjustments reflect $1 million in tax benefits for the nine months ended September 30, 2021.