Variable Interest Entities - Schedule of Statements of Operations Activity of the Consolidated VIEs (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Net Investment Income [Line Items]
Net recognized investment gains (losses) on trading securities	$ (231)	$ 21
Net recognized investment gains on mortgage loans	(756)	1,014
Net other gains	409	(893)
Total Revenues	5,059	5,548
Retirement Services
Net Investment Income [Line Items]
Net investment income	5,139	4,341
Net gains (losses) from investment activities	(2,078)	(828)
Total Revenues	4,048	4,502
VIE, Primary Beneficiary \| Retirement Services
Net Investment Income [Line Items]
Net investment income	79	84
Net recognized investment gains (losses) on trading securities	(45)	2
Net recognized investment gains on mortgage loans	2	20
Net recognized investment gains on investment funds	442	485
Net other gains	7	1
Net gains (losses) from investment activities	406	508
Total Revenues	485	592
VIE, Primary Beneficiary \| Trading securities \| Retirement Services
Net Investment Income [Line Items]
Net investment income	54	47
VIE, Primary Beneficiary \| Mortgage loans \| Retirement Services
Net Investment Income [Line Items]
Net investment income	32	43
VIE, Primary Beneficiary \| Investment funds \| Retirement Services
Net Investment Income [Line Items]
Net investment income	4	1
VIE, Primary Beneficiary \| Other \| Retirement Services
Net Investment Income [Line Items]
Net investment income	$ (11)	$ (7)

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