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v3.25.1

Stockholders' Equity - AOCI and Noncontrolling Interest (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | $ 11,086.4 |
Balances | 11,216.8 |
Change in redeemable noncontrolling interest rollforward |  |
Redeemable noncontrolling interest, balance at beginning of period | 337.7 | $ 248.9
Net income (loss) attributable to redeemable noncontrolling interest | 11.5 | (2.0)
Redeemable noncontrolling interest of deconsolidated entities | (12.5) | (90.0)
Contributions from redeemable noncontrolling interest | 30.8 | 226.2
Distributions to redeemable noncontrolling interest | (31.8) | (14.2)
Purchase of subsidiary shares from redeemable noncontrolling interest | (1.6) |
Change in redemption value of redeemable noncontrolling interest |  | 2.1
Other comprehensive income (loss) attributable to redeemable noncontrolling interest | (7.4) | (0.2)
Redeemable noncontrolling interest, balance at end of period | 326.7 | 370.8
Accumulated other comprehensive income (loss) |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | (5,224.8) | (5,345.3)
Other comprehensive income (loss) during the period, net of adjustments | 387.1 | 51.9
Amounts reclassified from AOCI | 51.8 | 37.3
Other comprehensive income (loss) | 438.9 | 89.2
Balances | (4,785.9) | (5,256.1)
Net unrealized gains (losses) on available-for-sale securities |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | (4,692.9) | (4,014.8)
Other comprehensive income (loss) during the period, net of adjustments | 540.0 | (393.1)
Amounts reclassified from AOCI | 49.4 | 34.5
Other comprehensive income (loss) | 589.4 | (358.6)
Balances | (4,103.5) | (4,373.4)
Net unrealized gains (losses) on available-for-sale debt securities with allowance for credit losses | 4.0 | 2.5
Net unrealized gains (losses) on derivative instruments |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | 51.8 | (2.1)
Other comprehensive income (loss) during the period, net of adjustments | 14.6 | 18.2
Amounts reclassified from AOCI | (0.5) | (0.7)
Other comprehensive income (loss) | 14.1 | 17.5
Balances | 65.9 | 15.4
Liability for future policy benefits discount rate remeasurement gain (loss) |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | 1,438.2 | 428.2
Other comprehensive income (loss) during the period, net of adjustments | (249.8) | 554.7
Other comprehensive income (loss) | (249.8) | 554.7
Balances | 1,188.4 | 982.9
Market risk benefit nonperformance risk remeasurement gain (loss) |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | (15.0) | (6.9)
Other comprehensive income (loss) during the period, net of adjustments | 2.1 | (8.7)
Other comprehensive income (loss) | 2.1 | (8.7)
Balances | (12.9) | (15.6)
Foreign currency translation adjustment |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | (1,785.9) | (1,498.0)
Other comprehensive income (loss) during the period, net of adjustments | 80.2 | (119.2)
Other comprehensive income (loss) | 80.2 | (119.2)
Balances | (1,705.7) | (1,617.2)
Unrecognized postretirement benefit obligations |  |
Change in accumulated other comprehensive income (loss) rollforward |  |
Balances | (221.0) | (251.7)
Amounts reclassified from AOCI | 2.9 | 3.5
Other comprehensive income (loss) | 2.9 | 3.5
Balances | $ (218.1) | $ (248.2)

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