Changes in Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Beginning Balance	$ (301.5)	$ (322.4)	$ (339.5)	$ (235.2)
Net unrealized gain (losses) on cash flow - Net of Tax	(2.9)		(1.7)
Reclassification gain (losses) on cash flow - Net of Tax	1.7		0.3
Gains/(Losses) on cash flow hedges - Net of Tax	(1.2)		(1.4)
Pension and other retirement benefit plans before reclassification - Net of Tax	3.3	6.7	3.3	6.7
Reclassification adjustment from AOCI, Pension and Other Postretirement Benefit Plans - Net of Tax	1.4	2.0	3.0	4.3
Pension and other retirement benefit - Net of Tax	4.7	8.7	6.3	11.0
Foreign currency translation adjustments before reclassification - Net of Tax	(19.4)	32.1	16.6	(58.4)
Amount reclassified from AOCI, Foreign Currency Translation Adjustment - Net of Tax				(0.1)
Foreign currency translation adjustments - Net of Tax	(19.4)	32.1	16.6	(58.5)
Available for sale securities before reclassification - Net of Tax	0.6	1.0	1.2	2.1
Amount reclassified from AOCI, Available fo Sale Securities - Net of Tax		(0.2)		(0.2)
Gains on Available for sale securities - Net of Tax	0.6	0.8	1.2	1.9
Other comprehensive income/(loss) before reclassifications	(18.4)	39.8	19.4	(49.6)
Amounts reclassified from AOCI	3.1	1.8	3.3	4.0
Total other comprehensive income (loss) - Net of Tax	(15.3)	41.6	22.7	(45.6)
Ending Balance	(316.8)	(280.8)	(316.8)	(280.8)
Gains Losses On Net Investment Hedges [Member]
Beginning Balance	(1.3)		(1.1)
Ending Balance	(2.5)		(2.5)
Pension and Other Retirement Benefits [Member]
Beginning Balance	(84.1)	(103.1)	(85.7)	(105.4)
Ending Balance	(79.4)	(94.4)	(79.4)	(94.4)
Foreign Currency Translation Adjustments [Member]
Beginning Balance	(220.0)	(221.3)	(256.0)	(130.7)
Ending Balance	(239.4)	(189.2)	(239.4)	(189.2)
Gains on Available for Sale Securities [Member]
Beginning Balance	3.9	2.0	3.3	0.9
Ending Balance	$ 4.5	$ 2.8	$ 4.5	$ 2.8