Components of Company's Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
U.S. Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	$ 9.4	$ 8.2	$ 18.9	$ 16.4
Interest Cost	11.2	11.1	22.4	22.2
Expected Return on Plan Assets	(24.1)	(24.5)	(48.2)	(48.9)
Amortization
Net Actuarial Loss (Gain)	7.4	5.3	14.8	10.7
Prior Service Cost	(0.1)	(0.1)	(0.2)	(0.2)
Net Periodic Expense (Benefit)	3.8		7.7	0.2
Non U.S. Plans
Defined Benefit plan Net periodic benefit cost
Interest Cost	1.4	1.8	2.8	3.5
Expected Return on Plan Assets	(1.4)	(1.8)	(2.9)	(3.5)
Amortization
Net Actuarial Loss (Gain)	0.4	(0.4)	0.8	(0.8)
Net Periodic Expense (Benefit)	0.4	(0.4)	0.7	(0.8)
Supplemental Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	0.9	0.7	1.8	1.5
Interest Cost	1.2	1.2	2.5	2.4
Amortization
Net Actuarial Loss (Gain)	1.9	1.4	3.7	2.9
Prior Service Cost	0.1	0.1	0.1	0.2
Net Periodic Expense (Benefit)	4.1	3.4	8.1	7.0
Postretirement Health Care Plan
Defined Benefit plan Net periodic benefit cost
Service Cost	0.1	0.1	0.1	0.1
Interest Cost	0.4	0.3	0.7	0.7
Amortization
Net Actuarial Loss (Gain)		(0.2)		(0.3)
Net Periodic Expense (Benefit)	$ 0.5	$ 0.2	$ 0.8	$ 0.5