Derivatives (Details 2) In Millions, unless otherwise specified	Sep. 30, 2012 Brazilian Real [Member] BRL	Dec. 31, 2011 Brazilian Real [Member] BRL	Sep. 30, 2012 Mexican Peso [Member] MXN	Dec. 31, 2011 Mexican Peso [Member] MXN	Sep. 30, 2012 Euro [Member] EUR (€)	Dec. 31, 2011 Euro [Member] EUR (€)	Sep. 30, 2012 British Pound [Member] GBP (£)	Dec. 31, 2011 British Pound [Member] GBP (£)	Sep. 30, 2012 Indian Rupee [Member] INR	Dec. 31, 2011 Indian Rupee [Member] INR
Outstanding foreign currency forward contracts not designated as cash flow hedges
Notional amounts	14.3	4.5	143.7	199.0	€ 10.0	€ 7.8	£ 4.4	£ 6.5	78.0	0

Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

Name:	us-gaap_NotionalAmountOfForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant