Schedule of Changes in Balance Sheet Position of Employee Related Restructuring Reserves for Continuing Operations (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Reserve at end of the period	$ 29.0
Restructuring employee-related
Restructuring Cost and Reserve [Line Items]
Reserve at beginning of the period	33.4	$ 39.6
Provision - charge	0.8	3.3
Provision - reversal	(0.1)
Cash payments	(5.1)	(2.9)
Translation difference	(0.5)	1.1
Reserve at end of the period	$ 28.5	$ 41.1

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 expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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