Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Summary of Adjustments to Balance Sheet due to Adoption of Guidance (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts payable and accrued expenses	$ 681.8	$ 662.1	$ 659.1
Income taxes payable	8.7	4.3	5.0
Retained earnings	3,650.6	3,477.3	3,479.0
Accumulated other comprehensive loss	$ (49.3)	(37.0)	$ (36.4)	$ (41.3)	$ (63.8)
ASU 2014-09
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts payable and accrued expenses		3.0
Income taxes payable		(0.7)
Retained earnings		(2.3)
Accumulated other comprehensive loss		0.0
ASU 2018-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts payable and accrued expenses		0.0
Income taxes payable		0.0
Retained earnings		0.6
Accumulated other comprehensive loss		$ (0.6)