Revenue (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenue [Abstract]
Capitalized Contract Cost, Net	$ 17,000,000		$ 17,000,000		$ 16,000,000
Capitalized Contract Cost, Amortization	6,000,000	$ 5,000,000	15,000,000	$ 15,000,000
Capitalized Contract Cost, Impairment Loss	0	$ 0	0	$ 0
Deferred revenue	113,000,000		$ 113,000,000		$ 155,000,000
Contracts with customers, period			1 year
Contract asset	65,000,000		$ 65,000,000
Revenue recognized	$ 33,000,000		$ 155,000,000