Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Asset Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Beginning balance	$ 319	$ 276
Additions	6	43
Ending balance	325	319
Intangible Assets
Beginning balance, cost	198	180
Additions	8	18
Ending balance, cost	206	198
Beginning balance, accumulated amortization	(15)	(5)
Amortization	(10)	(10)
Ending balance, accumulated amortization	(25)	(15)
Net Carrying Amount	181	183	$ 175
Total Goodwill and Other Intangible Assets - Net
Beginning balance	502	451
Additions	14	61
Amortization	(10)	(10)
Ending balance	$ 506	$ 502