Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Variable Interest Entity [Line Items]
Other comprehensive income (loss), net of tax	$ (409)	$ 730
Other investments	8,742		$ 8,105
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Other comprehensive income (loss), net of tax	0	$ 0
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Other investments	5,700		5,800
Variable Interest Entity, Not Primary Beneficiary | Sponsored Investment Funds
Variable Interest Entity [Line Items]
Carrying value	$ 161		$ 135