Plan Status of U.S. Plan, Non-U.S. Plan, and supplemental Plan (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 903.4	$ 974.8
Projected Benefit Obligation	1,006.5	1,091.5	$ 919.7
Plan Assets at Fair Value	1,342.0	1,440.8	1,342.1
Funded Status at end of year	$ 335.5	$ 349.3
Weighted-Average Assumptions:
Discount Rates	4.71%	4.25%
Rate of Increase in Compensation Level	4.25%	4.25%
Expected Long-Term Rate of Return on Assets	7.00%	7.25%
Non U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 156.5	$ 184.6
Projected Benefit Obligation	156.5	184.6	164.7
Plan Assets at Fair Value	144.3	157.6	148.5
Funded Status at end of year	$ (12.2)	$ (27.0)
Weighted-Average Assumptions:
Discount Rates	3.39%	3.20%
Expected Long-Term Rate of Return on Assets	3.73%	4.00%
Supplemental Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 102.1	$ 109.2
Projected Benefit Obligation	113.9	123.0	$ 101.5
Plan Assets at Fair Value	0.0	0.0
Funded Status at end of year	$ (113.9)	$ (123.0)
Weighted-Average Assumptions:
Discount Rates	4.71%	4.25%
Rate of Increase in Compensation Level	4.25%	4.25%