Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) ("AOCL") by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
AOCL, Beginning Balance	$ (14)	$ (13)
Other comprehensive (loss) income before reclassifications	(6)
Amounts reclassified from AOCL	(1)	(2)
Other comprehensive loss	(7)	(2)	$ (4)
AOCL, Ending Balance	(21)	(14)	(13)
Change in Fair Value of Available for Sale Debt Securities
Accumulated Other Comprehensive Income Loss [Line Items]
AOCL, Beginning Balance	(2)	2
Other comprehensive (loss) income before reclassifications	(16)	(1)
Amounts reclassified from AOCL	(1)	(4)
Other comprehensive loss	(17)	(5)
AOCL, Ending Balance	(19)	(2)	2
Change in Unrecognized Pension Cost Components
Accumulated Other Comprehensive Income Loss [Line Items]
AOCL, Beginning Balance	(12)	(15)
Other comprehensive (loss) income before reclassifications	10	1
Amounts reclassified from AOCL		2
Other comprehensive loss	10	3
AOCL, Ending Balance	$ (2)	$ (12)	$ (15)