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Leases - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leases [Line Items]
Operating leases expiration date	2028
Depreciation expense for continuing operations	$ 79.1	$ 76.6	$ 67.8
Assets Under Capital Lease [Member]
Leases [Line Items]
Depreciation expense for continuing operations	0.3	0.9	0.6
Continuing Operations [Member]
Leases [Line Items]
Rent expense, exclusive of related taxes	103.2	106.3	110.0
Discontinued Operations [Member]
Leases [Line Items]
Rent expense, exclusive of related taxes	$ 7.1	$ 13.6	$ 14.5
Minimum [Member]
Leases [Line Items]
Lease term range, years	5
Number of renewal options for extended terms	1
Maximum [Member]
Leases [Line Items]
Lease term range, years	10
Number of renewal options for extended terms	2

X

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X

- Definition

Operating Lease Expiration Date

+ References

No definition available.

+ Details

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X

- Definition

Operating leases general lease term.

+ References

No definition available.

+ Details

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X

- Definition

Operating leases number of renewal options for extended terms.

+ References

No definition available.

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X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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X

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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