Exit Activities and Discontinued Operations - Schedule of Retention Benefit Liability Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Other current liabilities	$ 170		$ 170		$ 156
Retention Benefits
Restructuring Reserve [Roll Forward]
Retention benefit liability at beginning of period			14	$ 11
Costs deferred as a regulatory asset	11	$ 2	14	5
Retention benefit liability at the end of the period	28	17	28	17
Other current liabilities	$ 25	$ 5	$ 25	$ 5