Earnings (Loss) Per Common Share - Summary of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Earnings (loss) per common share—basic | |||||||||||
| Net income from continuing operations | $ 38.8 | $ 93.4 | $ 99.5 | ||||||||
| Income (loss) from discontinued operations, net of tax | (448.1) | (1,541.1) | (4.5) | ||||||||
| Net income (loss) | $ (417.0) | $ (14.7) | $ 20.3 | $ 2.1 | $ (1,512.7) | $ (3.6) | $ 62.1 | $ 6.5 | $ (409.3) | $ (1,447.7) | $ 95.0 |
| Weighted-average common shares outstanding—basic (in shares) | 183.7 | 183.7 | 185.0 | ||||||||
| Basic earnings (loss) per common share: | |||||||||||
| Continuing operations (in dollars per share) | $ (0.36) | $ (0.02) | $ 0.25 | $ 0.35 | $ (0.51) | $ 0.17 | $ 0.54 | $ 0.31 | $ 0.21 | $ 0.51 | $ 0.54 |
| Discontinued operations (in dollars per share) | (1.91) | (0.06) | (0.14) | (0.33) | (7.72) | (0.19) | (0.20) | (0.27) | (2.44) | (8.39) | (0.02) |
| Basic earnings (loss) per common share (in dollars per share) | (2.27) | (0.08) | 0.11 | 0.01 | (8.23) | (0.02) | 0.34 | 0.04 | $ (2.23) | $ (7.88) | $ 0.51 |
| Diluted earnings (loss) per common share: | |||||||||||
| Add: Interest expense attributable to convertible notes, net of tax | $ 0.0 | $ 6.5 | $ 6.5 | ||||||||
| Income (loss) from continuing operations and assumed conversions | 38.8 | 99.9 | 106.0 | ||||||||
| Net (loss) income attributable to earnings per common share | $ (409.3) | $ (1,441.2) | $ 101.5 | ||||||||
| Incremental shares for assumed conversion of Convertible Notes (in shares) | 0.0 | 14.7 | 14.7 | ||||||||
| Outstanding options, restricted stock units and performance share units (in shares) | 2.0 | 0.9 | 1.4 | ||||||||
| Weighted-average common shares outstanding—diluted (in shares) | 185.7 | 199.3 | 201.1 | ||||||||
| Diluted earnings (loss) per common share: | |||||||||||
| Continuing operations (in dollars per share) | (0.36) | (0.02) | 0.24 | 0.33 | (0.51) | 0.16 | 0.51 | 0.29 | $ 0.21 | $ 0.50 | $ 0.53 |
| Discontinued operations, diluted (in dollars per share) | (1.91) | (0.06) | (0.12) | (0.30) | (7.72) | (0.17) | (0.18) | (0.25) | (2.41) | (7.73) | (0.02) |
| Diluted earnings (loss) per common share (in dollars per share) | $ (2.27) | $ (0.08) | $ 0.11 | $ 0.02 | $ (8.23) | $ (0.01) | $ 0.32 | $ 0.04 | $ (2.20) | $ (7.23) | $ 0.50 |
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- Definition Income (Loss) From Continuing Operations And Interest On Convertible Debt, Net Of Tax, Attributable To Parent No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- References No definition available.
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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after tax, of interest recognized on convertible debt instrument excluding interest on principal required to be paid in cash. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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