Variable Interest Entities - Narrative (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Assets	$ 297,258,000,000	$ 301,450,000,000
Liabilities	273,459,000,000	276,259,000,000
Contingent Commitment for Tax Credit Investments
Variable Interest Entity [Line Items]
Other commitment	50,000,000
Low Income Housing Tax Credit
Variable Interest Entity [Line Items]
Investment owned, cost	819,000,000
Production Tax Credit
Variable Interest Entity [Line Items]
Investment owned, cost	381,000,000
VIE - primary beneficiary
Variable Interest Entity [Line Items]
Assets	0	0
Liabilities	0	0
VIE - not primary beneficiary
Variable Interest Entity [Line Items]
Potential maximum loss exposure of unconsolidated funds	18,000,000	15,000,000
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	1,330,000,000	$ 1,600,000,000
Deferred contribution payments	$ 169,000,000