Changes in Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Beginning Balance	$ (235.2)	$ (54.6)	$ (82.1)
Net unrealized gain (losses) on cash flow - Net of Tax	(1.1)
Reclassification gain (losses) on cash flow hedges - Net of Tax			0.7
Gains/(Losses) on cash flow hedges	(1.1)		0.7
Pension and other retirement benefit plans before reclassification - Net of Tax	11.4	(56.7)	29.9
Reclassification adjustment from AOCI, pension and other retirement benefit plans - Net of Tax	8.3	4.5	7.0
Pension and other post retirement benefit - Net of Tax	19.7	(52.2)	36.9
Foreign currency translation adjustments before reclassification - Net of Tax	(125.2)	(133.7)	(11.5)
Amount reclassified from AOCI, Foreign currency translation adjustment - Net of Tax	(0.1)	4.4	1.4
Foreign currency translation adjustments - Net of Tax	(125.3)	(129.3)	(10.1)
Available for sale securities before reclassification - Net of Tax	3.3	1.0
Amount reclassified from AOCI, available for sale securities - Net of Tax	(0.9)	(0.1)
Available for sale securities - Net of Tax	2.4	0.9
Other comprehensive income/(loss) before reclassifications	(111.6)	(189.4)	18.4
Total other comprehensive income (loss) - Net of Tax	(104.3)	(180.6)	27.5
Amounts reclassified from AOCI	7.3	8.8	9.1
Ending Balance	(339.5)	(235.2)	(54.6)
Gains/(Losses) on Cash Flow Hedges [Member]
Beginning Balance			(0.7)
Ending Balance	(1.1)
Pension and Other Postretirement Plans Costs [Member]
Beginning Balance	(105.4)	(53.2)	(90.1)
Ending Balance	(85.7)	(105.4)	(53.2)
Foreign Currency Gain (Loss) [Member]
Beginning Balance	(130.7)	(1.4)	8.7
Ending Balance	(256.0)	(130.7)	$ (1.4)
Available for Sale Securities [Member]
Beginning Balance	0.9
Ending Balance	$ 3.3	$ 0.9