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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 + Details
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