Annual report pursuant to Section 13 and 15(d)

Shareholders' Deficit - Summary of Changes in Accumulated Other Comprehensive Loss (Detail)

v3.10.0.1
Shareholders' Deficit - Summary of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (334.7) $ 196.3 $ (53.5)
Other comprehensive (loss) income before reclassifications, net of tax (44.6) 37.0 (24.1)
Amounts reclassified from accumulated other comprehensive loss to income, net of tax [1] 0.2 2.7 (15.5)
Total other comprehensive (loss) income (44.4) 39.7 (39.6)
Ending balance (723.4) (334.7) 196.3
Foreign Currency Translation Adjustments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (170.6) (215.5) (183.0)
Other comprehensive (loss) income before reclassifications, net of tax (41.0) 44.9 (32.5)
Total other comprehensive (loss) income (41.0) 44.9 (32.5)
Ending balance (211.6) (170.6) (215.5)
Unrealized Gain (Loss) on Derivatives [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance 5.2 10.4 17.4
Other comprehensive (loss) income before reclassifications, net of tax (3.6) (7.9) 8.4
Amounts reclassified from accumulated other comprehensive loss to income, net of tax [1] 0.2 2.7 (15.4)
Total other comprehensive (loss) income (3.4) (5.2) (7.0)
Ending balance 1.8 5.2 10.4
Unrealized Gain (Loss) on Available-For-Sale Investments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance     0.1
Amounts reclassified from accumulated other comprehensive loss to income, net of tax [1]     (0.1)
Total other comprehensive (loss) income     (0.1)
Accumulated Other Comprehensive Loss [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance (165.4) (205.1) (165.5)
Ending balance $ (209.8) $ (165.4) $ (205.1)
[1] See Note 2, Basis of Presentation, and Note 11, Derivative Instruments and Hedging Activities, for information regarding the location in the consolidated statements of income of gains (losses) reclassified from accumulated other comprehensive loss to income during the years ended December 31, 2018, 2017, and 2016.