Shareholders' Equity - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
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Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
Beginning Balance | $ 196.3 | |||||||||||
Other comprehensive income (loss) before reclassifications, net of tax | $ 2.3 | $ (12.5) | 19.2 | $ 6.7 | ||||||||
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | (1.1) | [1] | (4.8) | [1] | (2.5) | [2] | (9.7) | [2] | ||||
Total other comprehensive income (loss) | 1.2 | (17.3) | 16.7 | (3.0) | ||||||||
Ending balance | 200.0 | 200.0 | ||||||||||
Foreign Currency Translation Adjustments [Member] | ||||||||||||
Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
Beginning Balance | (192.5) | (163.0) | (215.5) | (183.0) | ||||||||
Other comprehensive income (loss) before reclassifications, net of tax | 6.7 | (15.8) | 29.7 | 4.2 | ||||||||
Total other comprehensive income (loss) | 6.7 | (15.8) | 29.7 | 4.2 | ||||||||
Ending balance | (185.8) | (178.8) | (185.8) | (178.8) | ||||||||
Unrealized Gain (Loss) on Derivatives [Member] | ||||||||||||
Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
Beginning Balance | 2.9 | 11.8 | 10.4 | 17.4 | ||||||||
Other comprehensive income (loss) before reclassifications, net of tax | (4.4) | 3.3 | (10.5) | 2.5 | ||||||||
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | (1.1) | [1] | (4.8) | [1] | (2.5) | [2] | (9.6) | [2] | ||||
Total other comprehensive income (loss) | (5.5) | (1.5) | (13.0) | (7.1) | ||||||||
Ending balance | (2.6) | 10.3 | (2.6) | 10.3 | ||||||||
Other [Member] | ||||||||||||
Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
Beginning Balance | 0.1 | |||||||||||
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax | [2] | (0.1) | ||||||||||
Total other comprehensive income (loss) | (0.1) | |||||||||||
Accumulated Other Comprehensive Income (Loss) [Member] | ||||||||||||
Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
Beginning Balance | (189.6) | (151.2) | (205.1) | (165.5) | ||||||||
Ending balance | $ (188.4) | $ (168.5) | $ (188.4) | $ (168.5) | ||||||||
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