Annual report pursuant to Section 13 and 15(d)

Income Taxes - Changes Occurred in Amount of Unrecognized Tax Benefits (Detail)

v3.20.4
Income Taxes - Changes Occurred in Amount of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Beginning balance of unrecognized tax benefits $ 48.9 $ 53.5 $ 50.6
Additions for current year tax positions 9.7 8.4 12.8
Additions for prior year tax positions 1.3 6.1 0.7
Reductions for prior year tax positions (0.6) (15.4) (2.1)
Reductions for audit settlements (4.7) (0.1) (0.5)
Reductions for the expiration of statutes of limitations (2.1) (3.6) (4.8)
Changes due to foreign currency translation adjustments 0.2   (3.2)
Ending balance of unrecognized tax benefits (excluding interest and penalties) 52.7 48.9 53.5
Interest and penalties associated with unrecognized tax benefits 13.2 11.0 11.7
Ending balance of unrecognized tax benefits (including interest and penalties) $ 65.9 $ 59.9 $ 65.2