Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss (gain)	$ 39.8	$ (6.4)
Amortization of actuarial loss	(3.3)	(6.5)
Prior service cost occurring during the year	4.2	0.0
Business divestiture	0.0	(42.6)
Other adjustments	(0.2)	1.3
Settlement/curtailment gain	(4.3)	(4.4)
Total recognized in other comprehensive loss	36.2	(58.6)
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss (gain)	8.6	2.3
Amortization of actuarial loss	(0.9)	(0.8)
Prior service cost occurring during the year	0.0	0.0
Business divestiture	0.0	0.0
Other adjustments	(0.1)	0.0
Settlement/curtailment gain	(1.6)	(2.1)
Total recognized in other comprehensive loss	6.0	(0.6)
International | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss (gain)	31.2	(8.7)
Amortization of actuarial loss	(2.4)	(5.7)
Prior service cost occurring during the year	4.2	0.0
Business divestiture	0.0	(42.6)
Other adjustments	(0.1)	1.3
Settlement/curtailment gain	(2.7)	(2.3)
Total recognized in other comprehensive loss	$ 30.2	$ (58.0)