Income Taxes - Operating Loss Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,033	$ 608
Capital loss carryforwards	550	533
U.S. Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1	1
Capital loss carryforwards	0	112
Interest carryforwards	2,303	2,269
Federal foreign tax credit carryforwards	24	20
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	493	473
Capital loss carryforwards	0	123
Interest carryforwards	1,209	1,187
Other
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	461	490
Capital loss carryforwards	7	8
Interest carryforwards	129	26
Other carryforwards	$ 3	$ 5