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Schedule II Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ (16.7) |  | $ 20.4 | $ (4.2) | $ 20.3 | $ 46.9 |  | $ 20.2 | $ 54.2 | $ 49.1 | $ 45.0 |  | $ 19.8 | [1],[2] | $ 170.4 | [1],[2]
Changes in: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 53.9 |  | (109.4) | [2] | 4.5 | [2]
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  | 302.1 |  | 171.5 | [2] | 204.9 | [2]
Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of equity securities |  |  |  |  |  |  |  |  |  |  |  | (2.5) |  | (5.2) | [2] | (46.1) | [2]
Other, net |  |  |  |  |  |  |  |  |  |  |  | 9.2 |  | (9.6) |  | (10.2) |
Acquisition of business, net of cash acquired |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | (164.4) | [2] | 0.0 | [2]
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  | (107.4) |  | (214.6) | [2] | (302.0) | [2]
Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid to shareholders |  |  |  |  |  |  |  |  |  |  |  | (53.9) |  | (52.6) | [2] | (51.4) | [2]
Proceeds from issuance of 2023 Senior Notes due 2028 |  |  |  |  |  |  |  |  |  |  |  | 297.7 |  | 0.0 | [2] | 0.0 | [2]
Principal repayment on Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  | (249.0) |  | 0.0 |  | 0.0 |
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  | 0.3 |
Withholding tax payments on RSUs tendered |  |  |  |  |  |  |  |  |  |  |  | (1.8) |  | (2.4) | [2] | (2.0) | [2]
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | (207.8) |  | (47.8) | [2] | 208.5 | [2]
Net increase (decrease) in cash |  |  |  |  |  |  |  |  |  |  |  | (13.1) |  | (90.9) | [2] | 111.4 | [2]
Cash at beginning of year | [2] |  |  |  |  | 133.7 |  |  |  |  | 22.3 | 42.8 | [3] | 133.7 |  | 22.3 |
Cash at end of year |  | 42.8 | [2],[3] |  |  |  | 133.7 | [2] |  |  |  | 29.7 |  | 42.8 | [2],[3] | 133.7 | [2]
Parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  | 45.0 |  | 19.8 |  | 170.4 |
Equity in net income of subsidiaries |  |  |  |  |  |  |  |  |  |  |  | (72.7) |  | (41.3) |  | (190.1) |
Dividends received from subsidiaries |  |  |  |  |  |  |  |  |  |  |  | 132.1 |  | 184.3 |  | 66.0 |
Changes in: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  |  |  |  | (5.8) |  | 3.9 |  | 1.8 |
Other operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 6.0 |  | 0.8 |  | 8.4 |
Other |  |  |  |  |  |  |  |  |  |  |  | 1.2 |  | (1.5) |  | (2.6) |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  | 105.8 |  | 166.0 |  | 53.9 |
Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of equity securities |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  | 0.0 |
Other, net |  |  |  |  |  |  |  |  |  |  |  | (1.3) |  | (0.7) |  | 2.7 |
Capital contributions to subsidiaries |  |  |  |  |  |  |  |  |  |  |  | (98.0) |  | (35.0) |  | (5.0) |
Acquisition of business, net of cash acquired |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | (172.3) |  | 0.0 |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  |  |  | (99.3) |  | (208.0) |  | (2.3) |
Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid to shareholders |  |  |  |  |  |  |  |  |  |  |  | (53.9) |  | (52.6) |  | (51.4) |
Proceeds from issuance of 2023 Senior Notes due 2028 |  |  |  |  |  |  |  |  |  |  |  | 296.5 |  | 0.0 |  | 0.0 |
Principal borrowings on Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  | 114.0 |
Principal repayment on Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  | (249.0) |  | 0.0 |  | 0.0 |
Acquisition of treasury stock |  |  |  |  |  |  |  |  |  |  |  | (6.5) |  | (24.0) |  | (5.3) |
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  | 0.3 |
Withholding tax payments on RSUs tendered |  |  |  |  |  |  |  |  |  |  |  | (1.8) |  | (2.4) |  | (2.0) |
Proceeds for Share-based compensation |  |  |  |  |  |  |  |  |  |  |  | 8.0 |  | 7.1 |  | 6.7 |
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | (6.7) |  | (71.9) |  | 62.3 |
Net increase (decrease) in cash |  |  |  |  |  |  |  |  |  |  |  | (0.2) |  | (113.9) |  | 113.9 |
Cash at beginning of year |  |  |  |  |  | $ 114.2 |  |  |  |  | $ 0.3 | 0.3 |  | 114.2 |  | 0.3 |
Cash at end of year |  | $ 0.3 |  |  |  |  | $ 114.2 |  |  |  |  | $ 0.1 |  | $ 0.3 |  | $ 114.2 |
[1] | Recast for the adoption of ASU 2018-12. See Note 1 of the Consolidated Financial Statements
[2] | Recast for the adoption of ASU 2018-12. See Note 1 of the Consolidated Financial Statements
[3] | Recast for the adoption of ASU 2018-12. See Note 1 of the Consolidated Financial Statements

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