Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Beginning balance | $ (334.7) | |||
| Net income | $ 94.4 | $ 137.6 | 176.5 | $ 222.8 |
| Additional paid-in capital from share-based compensation | 20.2 | |||
| Repurchases of common shares | (681.4) | (286.2) | ||
| Foreign currency translation adjustment | (50.8) | $ 6.7 | (29.6) | $ 29.7 |
| Increase in additional paid-in capital due to partial unwind of Capped Call Transactions | 55.9 | |||
| Ending balance | $ (779.4) | (779.4) | ||
| 2024 Convertible Notes [Member] | ||||
| Increase in additional paid-in capital due to issuance of Convertible Notes | 136.7 | |||
| 2019 Convertible Notes [Member] | ||||
| Decrease in additional paid-in capital due to repurchase of Convertible Notes | $ (123.0) | |||
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- Definition Adjustment to additional paid in capital decrease in due to repurchase of convertible notes. No definition available.
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- Definition Adjustment to additional paid in capital increase in due to issuance of convertible notes. No definition available.
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- Definition Adjustment to additional paid in capital increase in due to partial unwind of capped call transactions. No definition available.
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- Definition Repurchase of common stock. No definition available.
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- Definition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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/presentationRef
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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