Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Beginning Balance	$ (280.8)	$ (47.3)	$ (235.2)	$ (54.6)
Other comprehensive income/(loss), Pension and Retirement Benefit Plans - Net of Tax			6.7	(4.1)
Reclassification adjustment from AOCI, Pension and Other Postretirement Benefit Plans - Net of Tax	$ 2.1	$ 1.1	6.4	2.5
Other comprehensive income (loss), Foreign Currency Translation Adjustment - Net of Tax	$ (41.7)	$ (87.4)	(100.1)	(81.8)
Amount reclassified from AOCI, Foreign Currency Translation Adjustment - Net of Tax			(0.1)	$ 4.4
Other comprehensive income (loss), Available for Sale Securities - Net of Tax	$ 0.7		2.8
Amount reclassified from AOCI, Available fo Sale Securities - Net of Tax	(0.6)		(0.8)
Other comprehensive income/(loss) before reclassifications	(41.0)	$ (87.4)	(90.6)	$ (85.9)
Amounts reclassified from AOCI	1.5	1.1	5.5	6.9
Total other comprehensive income (loss) - Net of Tax	(39.5)	(86.3)	(85.1)	(79.0)
Ending Balance	(320.3)	(133.6)	(320.3)	(133.6)
Pension And Other Postretirement Plans Costs [Member]
Beginning Balance	(94.4)	(55.9)	(105.4)	(53.2)
Total other comprehensive income (loss) - Net of Tax	2.1	1.1	13.1	(1.6)
Ending Balance	(92.3)	(54.8)	(92.3)	(54.8)
Foreign Currency Gain Loss [Member]
Beginning Balance	(189.2)	8.6	(130.7)	(1.4)
Total other comprehensive income (loss) - Net of Tax	(41.7)	(87.4)	(100.2)	(77.4)
Ending Balance	(230.9)	$ (78.8)	(230.9)	$ (78.8)
Available for sale Securities [Member]
Beginning Balance	2.8		0.9
Total other comprehensive income (loss) - Net of Tax	0.1		2.0
Ending Balance	$ 2.9		$ 2.9