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Financial Instruments - Net Investment Hedge Derivative Instruments on OCI (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ 0.8	$ 0.5
Amount of Gain (Loss) Reclassified from Accumulated OCI (Effective Portion)	0	0
Euro-denominated [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	0	0.1
Amount of Gain (Loss) Reclassified from Accumulated OCI (Effective Portion)	0	0
Canadian dollar-denominated [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	0.8	0.4
Amount of Gain (Loss) Reclassified from Accumulated OCI (Effective Portion)	$ 0	$ 0

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- Definition

Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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- Definition

Amounts reclassified from other comprehensive income to earnings during the period as a result of the sale or complete or substantially complete liquidation of an investment in a foreign entity. Net of tax effect.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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