Employee Benefit Plans Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
U.S. Plans
Defined Benefit Plan and Other Postretirement Benefit Plans Disclosure
Service Cost	$ 0.9	$ 14.9
Interest Cost	22.5	21.9
Expected Return on Plan Assets	(29.5)	(25.5)
Amortization of Net Actuarial Loss	1.3	14.6
Prior Service Credit	0	0
Net Periodic Benefit Cost	(4.8)	25.9
U.K. Plans
Defined Benefit Plan and Other Postretirement Benefit Plans Disclosure
Service Cost	1.1	1.1
Interest Cost	2.3	2.1
Expected Return on Plan Assets	(3.4)	(3.0)
Amortization of Net Actuarial Loss	0.1	0.3
Prior Service Credit	0	0
Net Periodic Benefit Cost	0.1	0.5
OPEB Plan
Defined Benefit Plan and Other Postretirement Benefit Plans Disclosure
Service Cost	0.1	0.2
Interest Cost	2.0	2.0
Expected Return on Plan Assets	(0.2)	(0.2)
Amortization of Net Actuarial Loss	0	0
Prior Service Credit	(0.4)	(1.2)
Net Periodic Benefit Cost	$ 1.5	$ 0.8