Shareholders' Equity (Deficit) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning Balance | $ (151.2) | $ (128.2) | $ (165.5) | $ (78.2) | ||||||||
| Other comprehensive income (loss) before reclassifications, net of tax | (12.5) | 13.1 | 6.7 | (37.1) | ||||||||
| Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | (4.8) | [1] | (3.3) | [1] | (9.7) | [2] | (3.1) | [2] | ||||
| Total other comprehensive (loss) income | (17.3) | 9.8 | (3.0) | (40.2) | ||||||||
| Ending balance | (168.5) | (118.4) | (168.5) | (118.4) | ||||||||
| Foreign Currency Translation Adjustments [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning Balance | (163.0) | (151.3) | (183.0) | (96.4) | ||||||||
| Other comprehensive income (loss) before reclassifications, net of tax | (15.8) | 10.5 | 4.2 | (44.4) | ||||||||
| Total other comprehensive (loss) income | (15.8) | 10.5 | 4.2 | (44.4) | ||||||||
| Ending balance | (178.8) | (140.8) | (178.8) | (140.8) | ||||||||
| Unrealized Gain (Loss) on Derivatives [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning Balance | 11.8 | 23.2 | 17.4 | 18.0 | ||||||||
| Other comprehensive income (loss) before reclassifications, net of tax | 3.3 | 2.6 | 2.5 | 9.1 | ||||||||
| Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | (4.8) | [1] | (3.3) | [1] | (9.6) | [2] | (4.6) | [2] | ||||
| Total other comprehensive (loss) income | (1.5) | (0.7) | (7.1) | 4.5 | ||||||||
| Ending balance | $ 10.3 | 22.5 | 10.3 | 22.5 | ||||||||
| Unrealized Gain (Loss) on Available-For-Sale Investments [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning Balance | (0.1) | 0.1 | 0.2 | |||||||||
| Other comprehensive income (loss) before reclassifications, net of tax | (1.8) | |||||||||||
| Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | [2] | (0.1) | 1.5 | |||||||||
| Total other comprehensive (loss) income | $ (0.1) | (0.3) | ||||||||||
| Ending balance | $ (0.1) | $ (0.1) | ||||||||||
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