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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows (used in)/from operating activities: |  |  |
Net income/(loss) | $ 534,700,000 | $ 51,100,000 | $ 29,800,000
Adjustments to reconcile net income/(loss) to net cash flows from operating activities: |  |  |
Depreciation and amortization | 11,000,000.0 | 43,300,000 | 53,300,000
Impairment of lease assets | 0 | (6,700,000) | 400,000
Amortization of right-of-use operating lease assets | 10,700,000 | 10,100,000 | 12,000,000.0
Interest on operating lease liabilities | 4,500,000 | 5,400,000 | 5,500,000
Realized and unrealized investment gains | (75,900,000) | (5,000,000.0) | (56,200,000)
Realized and unrealized investment losses | 61,400,000 | 182,600,000 | 47,400,000
Deferred tax expense/(benefit) | (197,700,000) | (104,600,000) | (3,200,000)
Net realized and unrealized investment foreign exchange (gains)/losses | (5,300,000) | 15,900,000 | 13,000,000.0
Net change from current period hedged transactions | (14,000,000.0) | 15,400,000 | (6,200,000)
Unrealized (gain)/loss on real estate fund in net investment income | 17,900,000 | (14,500,000) | (20,500,000)
Insurance reserves: |  |  |
Losses and loss adjustment expenses | 99,700,000 | 99,100,000 | 483,300,000
Unearned premiums | (31,200,000) | 345,200,000 | 310,200,000
Reinsurance recoverables: |  |  |
Unpaid losses | (319,900,000) | 1,599,600,000 | 109,500,000
Ceded unearned premiums | 3,800,000 | (141,200,000) | (143,100,000)
Other receivables | 11,700,000 | (26,400,000) | (19,400,000)
Deferred acquisition costs | 22,800,000 | (28,200,000) | 13,200,000
Reinsurance premiums payable | (563,500,000) | 1,404,400,000 | 1,200,000
Funds withheld | 43,600,000 | 1,100,000 | (5,700,000)
Premiums receivable | 47,100,000 | (177,800,000) | (142,900,000)
Income tax payable | 3,500,000 | (1,300,000) | (7,600,000)
Accrued expenses and other payable | 13,200,000 | (87,000,000.0) | 73,500,000
Fair value of derivatives and settlement of liabilities under derivatives | 15,400,000 | (21,700,000) | 13,600,000
Operating lease liabilities | (15,500,000) | (15,500,000) | (17,500,000)
Other assets | 6,900,000 | 900,000 | 100,000
Net cash (used in)/from operating activities | 324,700,000 | (55,000,000.0) | 524,700,000
Cash flows (used in)/from investing activities: |  |  |
(Purchases) of fixed income securities — Available for sale | (1,554,800,000) | (1,613,900,000) | (2,217,300,000)
(Purchases) of fixed income securities — Trading | (418,500,000) | (724,600,000) | (866,400,000)
Proceeds from sales and maturities of fixed income securities — Available for sale | 1,326,700,000 | 2,212,500,000 | 1,538,100,000
Proceeds from sales and maturities of fixed income securities — Trading | 474,000,000.0 | 293,600,000 | 548,200,000
Net proceeds from catastrophe bonds — Trading | 1,500,000 | 500,000 | 14,300,000
(Purchases) of short-term investments — Available for sale | (265,900,000) | (55,900,000) | (17,200,000)
Proceeds from sale of short-term investments — Available for sale | 231,000,000.0 | 13,600,000 | 99,600,000
(Purchases) of short-term investments — Trading | (15,100,000) | (7,000,000.0) | (26,800,000)
Proceeds from sale of short-term investments — Trading | 19,500,000 | 2,600,000 | 60,800,000
(Purchases) of privately-held investments - Available for sale | (14,700,000) | 0 | 0
(Purchases) of privately-held investments — Trading | (99,000,000.0) | (377,900,000) | (205,100,000)
Proceeds from sale of privately-held investments — Trading | 136,900,000 | 147,400,000 | 182,100,000
Net change in (payable)/receivable for securities (purchased)/sold | 19,900,000 | (31,800,000) | 26,600,000
(Purchases) of other investments | (9,300,000) | (62,500,000) | (20,000,000.0)
Net proceeds from sales of other investments | 4,900,000 | 5,900,000 | 0
Net (purchases)/sales of fixed assets | 8,900,000 | (3,000,000.0) | 64,500,000
Net (purchases)/sales of investments, equity method | (400,000) | (2,000,000.0) | (2,700,000)
Net cash (used in)/from investing activities | (172,200,000) | (196,500,000) | (950,300,000)
Cash flows used in/from financing activities: |  |  |
Repayments of Short-Term Debt | (300,000,000.0) | 0 | 0
Proceeds from term loan facility | 300,000,000.0 | 0 | 0
Capital contribution | 0 | 0 | 45,000,000.0
Dividends paid on ordinary shares | 40,300,000 | 40,000,000.0 | 0
Dividends paid on preference shares | (49,900,000) | (44,600,000) | (44,500,000)
Net cash (used in)/from financing activities | (90,200,000) | (84,600,000) | 500,000
Effect of exchange rate movements on cash and cash equivalents | 6,600,000 | (18,800,000) | (8,100,000)
(Decrease)/increase in cash and cash equivalents | 68,900,000 | (354,900,000) | (433,200,000)
Cash and cash equivalents at beginning of period | 959,200,000 | 1,314,100,000 | 1,747,300,000
Cash and cash equivalents at end of period (1) | 1,028,100,000 | 959,200,000 | 1,314,100,000
Restricted cash | 323,200,000 | 232,100,000 | 364,900,000
Supplemental disclosure of cash flow information: |  |  |
Net cash paid during the period for income taxes | 60,900,000 | 29,100,000 | 15,700,000
Cash paid during the period for interest | $ 15,600,000 | $ 14,300,000 | $ 14,000,000.0

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- Definition Amount of increase (decrease) in receivables classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The change in the premium receivable balance on the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The change in prepaid reinsurance premiums recorded on the balance sheet, which is needed to adjust net income to arrive at net cash flows provided by or used in operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The increase (decrease) during the reporting period in the amount due to other insurance companies when the reporting entity has assumed a portion of the cedant's insurance risk which has resulted in insurance losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition Amount of increase (decrease) unearned premiums written. Excludes portion of unearned premiums amortized into income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-24 + Details
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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-24 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-25 + Details
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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479365/842-20-25-6 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 12 -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-12 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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- Definition Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-11 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-11 + Details
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- Definition The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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- Definition The cash outflow to acquire securities classified as trading securities and held for investment purposes. Excludes payments for trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 + Details
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- Definition The cash inflow associated with the amount received by a corporation from a shareholder during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 + Details
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