v3.25.2
Derivative Financial Instruments - Effect of Hedges on Consolidated Statements of Operations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Gains (losses) recognized for hedging relationships        
Net investment income (loss) $ 1,162.8 $ 1,086.1 $ 2,328.5 $ 2,158.3
Net realized capital gains (losses) [1] 5.4 (15.2) (111.7) (16.1)
Benefits, claims and settlement expenses 1,839.9 2,077.9 4,059.9 4,147.6
Fair Value Hedges | Net investment income        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships 10.7 16.6 23.4 33.6
Fair Value Hedges | Net realized capital gains (losses)        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships   (0.3)   (0.3)
Fair Value Hedges | Benefits, claims and settlement expenses        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships (9.4) (6.7) (14.7) (9.8)
Fair Value Hedges | Interest rate contracts | Net investment income        
Gains (losses) recognized for hedging relationships        
Gain (loss) recognized on hedged item 15.0 1.5 42.4 (16.2)
Gain (loss) recognized on derivatives (16.4) (2.4) (42.5) 15.1
Amortization of hedged item basis adjustments 1.3 0.6 1.9 1.0
Amounts related to periodic settlements on derivatives 10.0 16.1 20.1 32.2
Fair Value Hedges | Interest rate contracts | Benefits, claims and settlement expenses        
Gains (losses) recognized for hedging relationships        
Gain (loss) recognized on hedged item 16.2 (3.5) 51.7 (18.3)
Gain (loss) recognized on derivatives (20.6) 2.4 (56.6) 18.6
Amounts related to periodic settlements on derivatives (5.0) (5.6) (9.8) (10.1)
Fair Value Hedges | Foreign exchange contracts | Net investment income        
Gains (losses) recognized for hedging relationships        
Amounts related to periodic settlements on derivatives 0.8 0.8 1.5 1.5
Fair Value Hedges | Foreign exchange contracts | Net realized capital gains (losses)        
Gains (losses) recognized for hedging relationships        
Gain (loss) recognized on hedged item 17.2 (1.6) 25.0 (5.7)
Gain (loss) recognized on derivatives (17.2) 1.3 (25.0) 5.4
Cash Flow Hedges | Net investment income        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships 9.5 7.4 18.6 14.1
Cash Flow Hedges | Net realized capital gains (losses)        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships 2.7 0.1 2.7 0.1
Cash Flow Hedges | Benefits, claims and settlement expenses        
Gains (losses) recognized for hedging relationships        
Total gain (loss) recognized for hedging relationships   3.7 (0.1) 7.5
Cash Flow Hedges | Interest rate contracts | Gain (loss) reclassified from AOCI on derivatives        
Gains (losses) recognized for hedging relationships        
Net investment income (loss) 0.6 0.9 1.3 1.8
Benefits, claims and settlement expenses   (0.1) (0.1) (0.1)
Cash Flow Hedges | Interest rate contracts | Net investment income        
Gains (losses) recognized for hedging relationships        
Amounts related to periodic settlements on derivatives (0.2)   (0.3)  
Cash Flow Hedges | Interest rate contracts | Net realized capital gains (losses)        
Gains (losses) recognized for hedging relationships        
Gain (loss) reclassified from AOCI into net income as a result that a forecasted transaction is no longer probable of occurring   0.1   0.1
Cash Flow Hedges | Interest rate contracts | Benefits, claims and settlement expenses        
Gains (losses) recognized for hedging relationships        
Amounts related to periodic settlements on derivatives   3.8   7.6
Cash Flow Hedges | Foreign exchange contracts | Gain (loss) reclassified from AOCI on derivatives        
Gains (losses) recognized for hedging relationships        
Net realized capital gains (losses) 2.7   2.7  
Cash Flow Hedges | Foreign exchange contracts | Net investment income        
Gains (losses) recognized for hedging relationships        
Amounts related to periodic settlements on derivatives 9.1 6.5 17.6 12.3
Net investment hedging relationships        
Gains (losses) recognized for hedging relationships        
Amount of gain (loss) recognized in AOCI on derivatives (2.5) 0.8 (3.6) 1.5
Net investment hedging relationships | Foreign exchange contracts        
Gains (losses) recognized for hedging relationships        
Amount of gain (loss) recognized in AOCI on derivatives $ (2.5) $ 0.8 $ (3.6) $ 1.5
[1] Includes realized and unrealized gains (losses). See Note 4, Investments, for further details.