Components of Company's Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 37.8	$ 32.7	$ 30.3
Interest Cost	44.7	44.4	42.1
Expected Return on Plan Assets	(96.5)	(97.7)	(93.3)
Amortization:
Net Loss (Gain)	29.7	21.5	42.5
Prior Service Cost	(0.4)	(0.4)	(0.4)
Net Periodic Pension Expense (Benefit)	$ 15.3	$ 0.5	$ 21.2
Weighted-Average Assumptions:
Discount Rates	4.25%	5.00%	4.25%
Rate of Increase in Compensation Level	4.25%	4.25%	4.02%
Expected Long-Term Rate of Return on Assets	7.25%	7.75%	7.75%
Non U.S. Plans
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 0.0	$ 0.0	$ 0.0
Interest Cost	5.7	6.9	6.6
Expected Return on Plan Assets	(5.9)	(7.0)	(6.2)
Amortization:
Net Loss (Gain)	1.5	(1.6)	1.0
Prior Service Cost	0.0	0.0	0.0
Net Periodic Pension Expense (Benefit)	$ 1.3	$ (1.7)	$ 1.4
Weighted-Average Assumptions:
Discount Rates	3.20%	4.31%	4.42%
Expected Long-Term Rate of Return on Assets	4.00%	4.84%	4.76%
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 3.6	$ 3.1	$ 1.6
Interest Cost	5.0	4.8	4.4
Amortization:
Net Loss (Gain)	7.3	5.8	6.7
Prior Service Cost	0.2	0.5	0.5
Net Periodic Pension Expense (Benefit)	$ 16.1	$ 14.2	$ 13.2
Weighted-Average Assumptions:
Discount Rates	4.25%	5.00%	4.25%
Rate of Increase in Compensation Level	4.25%	4.25%	4.02%