v3.25.2
Variable Interest Entities - Unconsolidated VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value $ 323,103.8 $ 313,663.6
Money Market Funds    
Total assets of unconsolidated money market mutual funds 5,100.0 4,500.0
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 297.8 308.2
Maximum exposure to loss 361.0 359.7
Residential mortgage-backed pass-through securities | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 3,705.8 3,674.2
Maximum exposure to loss 3,838.2 3,881.3
Residential mortgage-backed pass-through securities | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 8.7 9.0
Maximum exposure to loss 8.7 9.0
Commercial mortgage-backed securities | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 5,168.5 5,188.0
Maximum exposure to loss 5,507.7 5,634.3
Commercial mortgage-backed securities | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 73.2 44.2
Maximum exposure to loss 73.2 44.2
Collateralized debt obligations | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 6,838.8 6,560.4
Maximum exposure to loss 6,827.5 6,518.7
Collateralized debt obligations | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 212.7 135.3
Maximum exposure to loss 212.7 135.3
Other debt obligations | Available-for-sale | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 9,979.7 8,904.0
Maximum exposure to loss 11,479.1 10,580.8
Other debt obligations | Trading | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 299.5 210.0
Maximum exposure to loss 299.5 210.0
Equity securities | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 99.0 85.1
Maximum exposure to loss 99.0 85.1
Other investments: Other limited partnership and fund interests | Variable Interest Entity    
Unconsolidated Variable Interest Entity disclosures    
Asset carrying value 3,098.3 2,766.4
Maximum exposure to loss 5,168.6 4,804.6
Fully secured debt of international real estate funds with recourse to the investment manager, included in maximum loss exposure $ 259.5 $ 236.1