Variable Interest Entities - Narrative (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Assets	$ 338,481,000,000	$ 297,258,000,000
Total liabilities	312,653,000,000	273,459,000,000
Deferred contributions
Variable Interest Entity [Line Items]
Other commitment	124,000,000
LIHTC
Variable Interest Entity [Line Items]
Investment owned	736,000,000
Production tax credit investments
Variable Interest Entity [Line Items]
Investment owned	306,000,000
VIE - primary beneficiary
Variable Interest Entity [Line Items]
Assets	0	0
Total liabilities	0	0
VIE - not primary beneficiary | Unconsolidated Funds
Variable Interest Entity [Line Items]
Potential maximum loss exposure of unconsolidated funds	20,000,000	18,000,000
VIE - not primary beneficiary | Low-income housing, production and investment tax credit entities
Variable Interest Entity [Line Items]
Potential maximum loss exposure of unconsolidated funds	1,160,000,000	$ 1,330,000,000
Deferred contribution payments included in accrued expenses and other liabilities	$ 46,000,000