Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Variable interest entities
Assets	$ 165,737	$ 165,883
Liabilities	160,235	160,016
Nonconsolidated VIEs [Member] | Investment in non-consolidated CLOs [Member]
Variable interest entities
Assets	1	3
Nonconsolidated VIEs [Member] | Property funds [Member]
Variable interest entities
Assets	23	23
Nonconsolidated VIEs [Member] | Sponsored hedge funds and private equity funds [Member]
Variable interest entities
Assets	0	0
Nonconsolidated VIEs [Member] | Non-U.S. series funds [Member]
Variable interest entities
Assets	17	20
Nonconsolidated VIEs [Member] | Affordable housing partnerships
Variable interest entities
Assets	187	200
Liabilities	9	9
Variable Interest Entity, Primary Beneficiary [Member]
Variable interest entities
UnfundedCommitments	$ 20	$ 13