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Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance And Reserves, Balance, Beginning Balance	$ 324.4	$ 152.4	$ 192.4
Valuation allowance reversed		(58.2)	(22.0)
Valuation allowance raised	1.1
Arising on acquisition/ disposal of subsidiaries	(5.4)
Charged to unredeemed capital expenditure	60.2	222.8
Foreign currency translation adjustment	(50.1)	7.4	(18.0)
Valuation Allowance And Reserves, Balance, Ending Balance	$ 330.2	$ 324.4	$ 152.4

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Increase Decrease In Valuation Allowance

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- Definition

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- Definition

Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to accounts other than costs and expenses in a given period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, acquired in a business combination.

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

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-Topic 235

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-Section S99

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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



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