Accrued Restructuring Costs Activity (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Accrual Balance, at Beginning of Period		$ 10.8	$ 30.0
Restructuring costs, net		12.1	7.7	$ 22.0
Payments		(11.6)	(26.6)
Foreign Currency and Other		(0.6)	(0.3)
Accrual Balance, at End of Period		10.7	10.8	30.0
Severance and Other Employee-Related
Restructuring Cost and Reserve [Line Items]
Accrual Balance, at Beginning of Period	[1]	5.4	16.6
Restructuring costs, net	[1]	6.7	6.3
Payments	[1]	(5.6)	(17.2)
Foreign Currency and Other	[1]	(0.4)	(0.3)
Accrual Balance, at End of Period	[1]	6.1	5.4	16.6
Other Costs
Restructuring Cost and Reserve [Line Items]
Accrual Balance, at Beginning of Period	[2]	5.4	13.4
Restructuring costs, net	[2]	5.4	1.4
Payments	[2]	(6.0)	(9.4)
Foreign Currency and Other	[2]	(0.2)
Accrual Balance, at End of Period	[2]	$ 4.6	$ 5.4	$ 13.4

[1] For 2015 and 2014, the total headcount underlying these costs is approximately 204 and 2,850, respectively. At December 31, 2015, approximately 70 employees have not been terminated under the plans. The amounts accrued at December 31, 2015 for severance and other employee-related are expected to be paid through 2016.

[2] Amounts accrued at December 31, 2015 for other costs (principally lease and contract termination costs) are expected to be paid through 2019.