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Schedule II - Condensed Financial Information of Registrant Statements of Cash Flows (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2021 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash flows (used in)/from operating activities: |  |  |  |  |  |
Amortization of right-of-use operating lease assets |  | $ 5.1 | $ 5.2 | $ 10.1 | $ 12.0 | $ 11.8
Interest on operating lease liability |  |  |  | (5.4) | (5.5) |
Change in right of lease assets |  |  |  | (6.7) | 0.4 | 12.9
Change in operating lease liabilities |  |  |  | (15.5) | (17.5) | (17.3)
Net cash (used in)/from operating activities |  | 264.6 | 104.8 | (55.0) | 524.7 | (672.7)
Cash flows (used in)/from investing activities: |  |  |  |  |  |
Proceeds/(purchases) of short term investments |  | (15.0) | 0.0 | (7.0) | (26.8) | (58.3)
Payments for acquisitions and investments, net of cash acquired |  | (0.4) |  | (2.0) | (3.2) |
(Purchases) of other investments |  | (3.0) | (46.6) | (62.5) | (20.0) | 0.0
Net cash (used in)/from investing activities |  | (124.5) | (92.9) | (196.5) | (950.3) | 1,151.2
Cash flows used in/from financing activities: |  |  |  |  |  |
Net cash (used in)/from financing activities |  | (42.2) | (42.2) | (84.6) | 0.5 | 223.5
Cash and cash equivalents at beginning of period |  | 959.2 | 1,314.1 | 1,314.1 |  |
Cash and cash equivalents at end of period (1) |  | 1,061.5 |  | 959.2 | 1,314.1 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect |  | 102.3 | (49.2) | (354.9) | (433.2) | 716.8
Proceeds from sales and maturities of fixed income securities — Trading |  | 283.9 | 134.8 | 293.6 | 548.2 | 554.4
Parent Company |  |  |  |  |  |
Cash flows (used in)/from operating activities: |  |  |  |  |  |
Net income (excluding equity in net earnings of subsidiaries) |  |  |  | 36.9 | 120.3 | 52.0
Realized and unrealized losses/(gains) |  |  |  | 19.7 | (6.7) | 1.5
(Gain)/loss on derivative contracts |  |  |  | (15.4) | 6.2 | (0.3)
Amortization of right-of-use operating lease assets |  |  |  | 0.5 | 0.5 | 0.4
Interest on operating lease liability |  |  |  | 0.1 | 0.1 | (0.4)
Change in other assets |  |  |  | 2.1 | (1.6) | 0.5
Change in right of lease assets |  |  |  | 0.0 | (2.0) | 0.0
Change in accrued expenses and other payables |  |  |  | (3.2) | 1.4 | 15.9
Change in intercompany activities |  |  |  | 41.1 | 35.0 | 41.6
Change in operating lease liabilities |  |  |  | (0.6) | 1.5 | 0.0
Net cash (used in)/from operating activities |  |  |  | 81.2 | 154.7 | 111.2
Cash flows (used in)/from investing activities: |  |  |  |  |  |
(Purchases) of fixed income securities |  |  |  | (10.0) | (42.6) | 75.6
Investment in subsidiaries |  |  |  | 5.0 | (115.0) | (87.3)
Net cash (used in)/from investing activities |  |  |  | 2.8 | (157.6) | (11.7)
Cash flows used in/from financing activities: |  |  |  |  |  |
Net cash (used in)/from financing activities |  |  |  | (84.6) | (44.5) | (44.5)
Cash and cash equivalents at beginning of period |  | 44.4 | $ 45.0 | 45.0 | 92.4 | 37.4
Cash and cash equivalents at end of period (1) |  |  |  | 44.4 | 45.0 | 92.4
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect |  |  |  | (0.6) | (47.4) | 55.0
Proceeds from sales and maturities of fixed income securities — Trading |  |  |  | 7.8 | 0.0 | $ 0.0
MVI |  |  |  |  |  |
Cash flows (used in)/from investing activities: |  |  |  |  |  |
Payments for acquisitions and investments, net of cash acquired | $ (0.8) | $ 0.0 |  | $ (0.4) | $ (0.4) |

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