Variable Interest Entities (Details) - USD ($) $ in Millions		Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total VIE Assets		$ 65,465	$ 58,906
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total VIE Assets		1,012	1,242
Remaining Coverage, Amount		297
Variable Interest Entity, Not Primary Beneficiary | 2019-1 Ltd. (Mar-19)
Variable Interest Entity [Line Items]
Total VIE Assets		0	71
Variable Interest Entity, Not Primary Beneficiary | 2019-3 Ltd. (Jul-19)
Variable Interest Entity [Line Items]
Total VIE Assets		0	99
Variable Interest Entity, Not Primary Beneficiary | 2021-3 Ltd. (Sep-21)
Variable Interest Entity [Line Items]
Total VIE Assets		395	429
Remaining Coverage, Amount	[1]	104
Variable Interest Entity, Not Primary Beneficiary | 2022-1 Ltd. (Jan-22)
Variable Interest Entity [Line Items]
Total VIE Assets		230	256
Remaining Coverage, Amount	[1]	20
Variable Interest Entity, Not Primary Beneficiary | 2022-2 Ltd. (Sep-22)
Variable Interest Entity [Line Items]
Total VIE Assets		201	201
Remaining Coverage, Amount	[1]	126
Variable Interest Entity, Not Primary Beneficiary | 2023-1 Ltd. (Oct-23)
Variable Interest Entity [Line Items]
Total VIE Assets		186	$ 186
Remaining Coverage, Amount	[1]	$ 47

[1] Coverage from a separate panel of reinsurers remaining at June 30, 2024.