v3.26.1
Variable Interest Entities - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value $ 352,752.3 $ 341,376.5
Money Market Funds    
Total assets of unconsolidated money market mutual funds 6,400.0 5,900.0
Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Carrying value used if distributions received are in excess of investment 0.0 0.0
Corporate debt securities | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 263.1 289.4
Maximum exposure to loss 310.7 361.7
Residential mortgage-backed pass-through securities | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 3,662.8 3,805.1
Maximum exposure to loss 3,769.7 3,868.4
Residential mortgage-backed pass-through securities | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 7.8 8.4
Maximum exposure to loss 7.8 8.4
Commercial mortgage-backed securities | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 5,620.6 5,371.6
Maximum exposure to loss 5,938.5 5,659.6
Commercial mortgage-backed securities | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 69.7 70.7
Maximum exposure to loss 69.7 70.7
Collateralized debt obligations | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 5,871.3 6,422.3
Maximum exposure to loss 5,880.3 6,417.4
Collateralized debt obligations | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 207.3 211.0
Maximum exposure to loss 207.3 211.0
Other debt obligations | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 11,121.1 10,681.3
Maximum exposure to loss 12,857.1 12,167.2
Other debt obligations | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 260.2 338.8
Maximum exposure to loss 260.2 338.8
Equity securities | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 119.0 109.5
Maximum exposure to loss 119.0 109.5
Other investments: Other limited partnership and fund interests | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 3,651.5 3,498.4
Maximum exposure to loss 5,512.2 5,500.7
Fully secured debt of international real estate funds with recourse to the investment manager, included in maximum loss exposure $ 249.3 $ 256.1