Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance And Reserves, Balance, Beginning Balance	$ 195.3	$ 152.4	$ 192.4	$ 195.5
Charged to costs and expenses	(10.3)	(58.2)	(22.0)	8.3
Deduction				(0.1)
Charged to unredeemed capital expenditure		222.8
Foreign currency translation adjustment	7.4	7.4	(18.0)	(8.4)
Valuation Allowance And Reserves, Balance, Ending Balance	$ 192.4	$ 324.4	$ 152.4	$ 195.3

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.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

Reference 2: 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=6881521&loc=d3e24092-122690

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