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Profit on Disposal, Net - Summary of Profit on Disposal, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Gain Loss On Disposition [Line Items]
Profit on disposal, net		$ 0	$ 0.1	$ 0
United Kingdom Real Estate [Member]
Gain Loss On Disposition [Line Items]
Profit on disposal, net	0.1	0	0.1	0
US Real Estate [Member]
Gain Loss On Disposition [Line Items]
Profit on disposal, net		$ 0	$ 0	$ 0

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

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