Employee Benefit Plans Net Periodic Benefit Cost (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Pension Benefits, U.S. Plans USD ($)	Dec. 31, 2013 Pension Benefits, U.S. Plans USD ($)	Dec. 31, 2012 Pension Benefits, U.S. Plans USD ($)	Dec. 31, 2014 Pension Benefits, Non U.S. Plans USD ($)	Dec. 31, 2013 Pension Benefits, Non U.S. Plans USD ($)	Dec. 31, 2013 Pension Benefits, Non U.S. Plans GBP (£)	Dec. 31, 2012 Pension Benefits, Non U.S. Plans USD ($)	Dec. 31, 2014 Other Postretirement Benefit Plans USD ($)	Dec. 31, 2013 Other Postretirement Benefit Plans USD ($)	Dec. 31, 2012 Other Postretirement Benefit Plans USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans
Service Cost	$ 3.7	$ 59.4	$ 48.8	$ 2.3	$ 4.3		$ 4.2	$ 0.3	$ 0.7	$ 1.6
Interest Cost	89.9	86.3	84.4	9.1	8.6		8.5	7.9	8.0	9.6
Expected Return on Plan Assets	(117.8)	(105.5)	(88.8)	(13.7)	(12.5)		(11.1)	(0.7)	(0.6)	(0.7)
Amortization of Net Actuarial Loss	5.2	31.7	45.9	0.4	1.2		0.5	0	0	0
Amortization of Prior Service Cost (Credit)	0	(0.1)	(0.4)	0	0		0	(1.7)	(4.9)	(2.6)
Recognized Net Gain (Loss) Due to Curtailments	0	0.7	0	0	(3.7)	(2.3)	0	0	0	0
Pension Settlement Costs	64.4	0	0	0	0		0	0	0	0
Net Periodic Benefit Cost	$ 45.4	$ 72.5	$ 89.9	$ (1.9)	$ (2.1)		$ 2.1	$ 5.8	$ 3.2	$ 7.9