Notional Amounts of Derivative Financial Instruments and Related Fair Values Measured on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Total derivative financial instruments, notional amounts	$ 378.9	$ 311.4
Total derivative financial instruments, fair value (net)	(7.4)	(3.9)
Designated as Hedging Instrument \| Cash Flow Hedging \| Interest rate swap contract \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Notional Amounts of Derivative Instruments, Liability	186.3	300.0
Fair value of Derivative Instruments, Liability	(4.5)	(4.6)
Not Designated as Hedging Instrument \| Cash Flow Hedging \| Interest rate swap contract \| Accrued expense
Derivatives, Fair Value [Line Items]
Notional Amounts of Derivative Instruments, Liability	180.0
Fair value of Derivative Instruments, Liability	(1.6)
Not Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign exchange contracts \| Accrued expense
Derivatives, Fair Value [Line Items]
Fair value of Derivative Instruments, Liability	(1.3)
Not Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign exchange contracts \| Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Notional Amounts of Derivative Instruments, Asset	12.6	11.4
Fair value of Derivative Instruments, Asset		$ 0.7

Monetary amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

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Total monetary amount specified by the derivative asset(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

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-Name Accounting Standards Codification

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Statement of Financial Accounting Standard (FAS)

-Number 133

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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Total monetary amount specified by the derivative liability (or liabilities). Expressed as an absolute value.

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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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