Supplemental Cash Flow Information - Net change (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net change in proceeds managed
Net change in fixed income securities	$ (521)	$ 0	$ 0
Net change in short-term investments	(49)	(539)	396
Operating cash flow (used) provided	(570)	(539)	396
Net change in cash	3	9	(12)
Net change in proceeds managed	(567)	(530)	384
Net change in liabilities
Liabilities for collateral, beginning of year	(1,444)	(914)	(1,298)
Liabilities for collateral, end of year	(2,011)	(1,444)	(914)
Operating cash flow provided (used)	$ 567	$ 530	$ (384)