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Schedule II - Condensed Financial Information of Registrant Statements of Cash Flows (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities: |  |  |
Amortization of right-of-use operating lease assets | $ 9,900,000 | $ 10,700,000 | $ 10,100,000
Change in right of lease assets | 0 | 0 | (6,700,000)
Change in operating lease liabilities | (15,900,000) | (15,500,000) | (15,500,000)
Net cash provided by/(used in) operating activities | 554,900,000 | 324,700,000 | (55,000,000.0)
Cash flows from investing activities: |  |  |
Proceeds from sales and maturities of fixed income securities — Trading | 850,100,000 | 474,000,000.0 | 293,600,000
Net cash (used in) investing activities | (352,800,000) | (172,200,000) | (196,500,000)
Cash flows from financing activities: |  |  |
Repayments of Short-Term Debt | 0 | (300,000,000.0) | 0
Proceeds from term loan facility | 0 | 300,000,000.0 | 0
Payments of Ordinary Dividends, Common Stock | (195,000,000.0) | (40,300,000) | (40,000,000.0)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock | 54,900,000 | 49,900,000 | 44,600,000
Net cash (used in) financing activities | (307,900,000) | (90,200,000) | (84,600,000)
(Decrease) in cash and cash equivalents | (113,900,000) | 68,900,000 | (354,900,000)
Cash and cash equivalents at beginning of period | 1,028,100,000 |  |
Cash and cash equivalents at end of period (2) | 914,200,000 | 1,028,100,000 |
Redemption of preference shares (1) | (275,000,000.0) | 0 | 0
Preference share issuance | 217,000,000.0 | 0 | 0
Parent |  |  |
Cash flows from financing activities: |  |  |
Proceeds from term loan facility | 0 | 300,000,000.0 | 0
Redemption of preference shares (1) | (275,000,000.0) | 0 | 0
Preference share issuance | 217,000,000.0 | 0 |
Parent Company |  |  |
Cash flows from operating activities: |  |  |
Net income (excluding equity in net earnings of subsidiaries) | 377,200,000 | 230,000,000.0 | 36,900,000
Realized and unrealized investment (gains)/losses | (400,000) | (14,800,000) | 19,700,000
Loss/(gain) on derivative contracts | 0 | 14,000,000.0 | (15,400,000)
Amortization of right-of-use operating lease assets | 700,000 | 500,000 | 500,000
Interest on operating lease liability | 100,000 | 100,000 | 100,000
Change in other assets | (39,000,000.0) | 300,000 | 2,100,000
Change in accrued expenses and other payables | (7,100,000) | 5,500,000 | (3,200,000)
Change in intercompany activities | (64,100,000) | (38,400,000) | 41,100,000
Change in operating lease liabilities | (500,000) | (500,000) | (600,000)
Net cash provided by/(used in) operating activities | 266,900,000 | 196,700,000 | 81,200,000
Cash flows from investing activities: |  |  |
(Purchases) of fixed income securities | (11,300,000) | (8,100,000) | (10,000,000.0)
Proceeds from sales and maturities of fixed income securities — Trading | 10,300,000 | 6,400,000 | 7,800,000
Investment in subsidiaries | 42,000,000.0 | (105,700,000) | 5,000,000.0
Net cash (used in) investing activities | 41,000,000.0 | (107,400,000) | 2,800,000
Cash flows from financing activities: |  |  |
Repayments of Short-Term Debt | 0 | (300,000,000.0) | 0
Net cash (used in) financing activities | (307,900,000) | (90,200,000) | (84,600,000)
(Decrease) in cash and cash equivalents | 0 | (900,000) | (600,000)
Cash and cash equivalents at beginning of period | 43,500,000 | 44,400,000 | 45,000,000.0
Cash and cash equivalents at end of period (2) | $ 43,500,000 | $ 43,500,000 | $ 44,400,000

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