Revenue - Contract Balances (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Contract Assets (Unearned Income)
Current contract assets	$ 155,000,000		$ 155,000,000		$ 154,000,000
Long-term contract assets	14,000,000		14,000,000		8,000,000
Current unearned income	(73,000,000)		(73,000,000)		(82,000,000)
Long-term unearned income	(46,000,000)		(46,000,000)		(48,000,000)
Net Contract Assets	50,000,000		50,000,000		32,000,000
Accounts receivable, net	684,000,000		684,000,000		$ 699,000,000
Revenue recognized	18,000,000	$ 30,000,000	53,000,000	$ 88,000,000
Midas Sale
Contract Assets (Unearned Income)
Revenue recognized	$ 0	$ 17,000,000	$ 7,000,000	$ 35,000,000