Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash paid (refunded) for:
Interest paid	$ 93	$ 60
Income taxes (refunded) paid	(10)	3
Deferred sales inducements	219	112
Non-cash investing and financing activities:
Investments received from pension risk transfer premiums	0	464
Change in proceeds of sales of investments available for sale receivable in period	(87)	34
Change in purchases of investments available for sale payable in period	$ 633	$ 146