Stockholders' Equity - Components of accumulated other comprehensive income (loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period			$ 1,462
Balance at the end of period	$ 1,461
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period	(42)	$ (42)	(53)
Other comprehensive income	10		11
Balance at the end of period	(32)	(42)	(42)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period	(2)	(1)	(1)
Other comprehensive income	(1)	(1)
Balance at the end of period	(3)	(2)	(1)
Unrecognized (loss) gain on on interest rate swaps
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period	11	10	(1)
Other comprehensive income	11	1	11
Balance at the end of period	22	11	10
Loss on pension and other postretirement plans
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of period	(51)	(51)	(51)
Balance at the end of period	$ (51)	$ (51)	$ (51)