Components of Net Periodic Pension Cost (Detail) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5.8	$ 4.4	$ 11.6	$ 10.2
Interest cost on projected benefit obligation	7.7	6.8	15.4	13.9
Expected return on plan assets	(7.2)	(6.0)	(14.4)	(12.1)
Amortization of prior service costs	0.6	0.6	1.1	1.2
Recognized net actuarial loss	2.6	1.0	5.2	2.4
Net periodic cost	9.5	6.8	18.9	15.6
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.5	2.1	4.9	4.3
Interest cost on projected benefit obligation	3.9	3.6	7.8	7.4
Expected return on plan assets	(3.9)	(3.5)	(7.7)	(7.2)
Amortization of prior service costs	0.1	0.1	0.2	0.2
Recognized net actuarial loss	0.6	0.5	1.2	0.9
Net periodic cost	3.2	2.8	6.4	5.6
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	8.3	6.5	16.5	14.5
Interest cost on projected benefit obligation	11.6	10.4	23.2	21.3
Expected return on plan assets	(11.1)	(9.5)	(22.1)	(19.3)
Amortization of prior service costs	0.7	0.7	1.3	1.4
Recognized net actuarial loss	3.2	1.5	6.4	3.3
Net periodic cost	$ 12.7	$ 9.6	$ 25.3	$ 21.2