Components of Company's Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 32.7	$ 30.3	$ 35.3
Interest Cost	44.4	42.1	41.4
Expected Return on Plan Assets	(97.7)	(93.3)	(87.0)
Amortization:
Net Loss (Gain)	21.5	42.5	34.3
Prior Service Cost	0.4	(0.4)	(0.4)
Net Periodic Pension Expense (Benefit)	0.5	21.2	23.6
Weighted-Average Assumptions:
Discount Rates	5.00%	4.25%	4.75%
Rate of Increase in Compensation Level	4.25%	4.02%	4.02%
Expected Long-Term Rate of Return on Assets	7.75%	7.75%	8.00%
Non U.S. Plans
Defined Benefit plan Net periodic benefit cost
Interest Cost	6.9	6.6	6.2
Expected Return on Plan Assets	(7.0)	(6.2)	(6.8)
Amortization:
Net Loss (Gain)	(1.6)	1.0	0.7
Net Periodic Pension Expense (Benefit)	(1.7)	1.4	0.1
Weighted-Average Assumptions:
Discount Rates	4.31%	4.42%	5.02%
Expected Long-Term Rate of Return on Assets	4.84%	4.76%	5.28%
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	3.1	1.6	3.0
Interest Cost	4.8	4.4	4.5
Amortization:
Net Loss (Gain)	5.8	6.7	6.1
Prior Service Cost	0.5	0.5	0.6
Net Periodic Pension Expense (Benefit)	$ 14.2	$ 13.2	$ 14.2
Weighted-Average Assumptions:
Discount Rates	5.00%	4.25%	4.75%
Rate of Increase in Compensation Level	4.25%	4.02%	4.02%