Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Significant Accounting Policies [Line Items]
Assets of managed investment entities	$ 29,048		$ 29,048		$ 28,831
Liabilities of managed investment entities	25,055		25,055		24,779
Operating lease liability	$ 190		$ 190		$ 116
Operating lease liability, current, Statement of Financial Position	Other Liabilities		Other Liabilities		Other Liabilities
Operating lease right-of-use asset	$ 167		$ 167		$ 103
Operating lease, right-of-use asset, Statement of Financial Position	Other Assets		Other Assets		Other Assets
Weighted average common shares adjustment related to stock-based compensation (shares)	100,000	200,000	100,000	600,000
Anti-dilutive potential common shares related to stock-based compensation plans (shares)	0	0	0	0
Maturities of short term investments			3 months
Lessee, Operating Lease, Renewal Term	10 years		10 years
New collateralized loan obligation temporary warehousing entities
Significant Accounting Policies [Line Items]
Assets of managed investment entities	$ 105		$ 105
Liabilities of managed investment entities	$ 86		$ 86