Schedule of Changes in Balance Sheet Position of Restructuring Reserves (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$ 79.8us-gaap_RestructuringReserve	$ 94.2us-gaap_RestructuringReserve
Provision/ Charge	35.6us-gaap_RestructuringCharges	42.8us-gaap_RestructuringCharges
Provision/ Reversal	(0.9)	(2.3)
Cash payments	(26.2)us-gaap_PaymentsForRestructuring	(44.5)us-gaap_PaymentsForRestructuring
Translation difference	(9.0)	(10.4)
Restructuring reserve, ending balance	79.3us-gaap_RestructuringReserve	79.8us-gaap_RestructuringReserve
Restructuring employee-related
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	79.6	93.9
Provision/ Charge	35.5	42.6
Provision/ Reversal	(0.9)	(2.3)
Cash payments	(25.9)	(44.2)
Translation difference	(9.0)	(10.4)
Restructuring reserve, ending balance	79.3	79.6
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.2	0.3
Provision/ Charge	0.1	0.2
Provision/ Reversal		0
Cash payments	(0.3)	(0.3)
Translation difference		0
Restructuring reserve, ending balance		$ 0.2

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

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Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

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