Employee Benefits - Change In Plan Assets (Detail) - Pension Plans, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value at beginning of year	$ 1,506.4
Fair Value at end of year	1,380.1	$ 1,506.4
U.S. Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value at beginning of year	1,506.4	1,393.5
Actual Return on Assets	(85.1)	192.5
Employer Contributions	50.0	0.0
Employee Contributions	0.0	0.0
Settlement	0.0	0.0
Acquisitions/Divestitures	0.0	0.0
Benefits Paid	(91.2)	(79.6)
Foreign Exchange Rate Changes	0.0	0.0
Fair Value at end of year	1,380.1	1,506.4
Non U.S. Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value at beginning of year	178.7	139.3
Actual Return on Assets	(2.3)	12.4
Employer Contributions	2.6	3.0
Employee Contributions	0.4	0.1
Settlement	(2.7)	(6.8)
Acquisitions/Divestitures	0.0	18.5
Benefits Paid	(1.1)	(3.0)
Foreign Exchange Rate Changes	(8.9)	15.2
Fair Value at end of year	$ 166.7	$ 178.7