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Variable Interest Entities - Consolidated VIEs (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Carrying amounts of consolidated VIE assets and liabilities
Total assets	$ 295,634.6	$ 296,627.7
Total liabilities	279,908.8	279,754.8
Redeemable noncontrolling interest	263.5	255.6	$ 239.7	$ 264.9
Aggregate consolidated variable interest entities
Carrying amounts of consolidated VIE assets and liabilities
Total assets	43,306.7	43,233.5
Total liabilities	41,221.9	41,552.4
Redeemable noncontrolling interest	226.8	226.8
Mandatory retirement savings funds
Carrying amounts of consolidated VIE assets and liabilities
Total assets	41,627.9	41,995.2
Total liabilities	41,177.8	41,527.9
Real estate VIE
Carrying amounts of consolidated VIE assets and liabilities
Total assets	543.4	499.0
Total liabilities	34.2	21.3
Sponsored investment funds
Carrying amounts of consolidated VIE assets and liabilities
Total assets	449.0	419.5
Total liabilities	9.9	3.2
Redeemable noncontrolling interest	226.8	226.8
Residential mortgage loans
Carrying amounts of consolidated VIE assets and liabilities
Total assets	$ 686.4	$ 319.8

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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