Financial Instruments (Details) (Net investment hedge contracts [Member]) In Millions, unless otherwise specified	Dec. 31, 2012 Oct - 19 USD ($)	Dec. 31, 2012 Oct - 19 EUR (€)	Dec. 31, 2011 Oct - 19 USD ($)	Dec. 31, 2011 Oct - 19 EUR (€)	Dec. 31, 2012 Nov - 16 USD ($)	Dec. 31, 2012 Nov - 16 JPY (¥)	Dec. 31, 2011 Nov - 16 USD ($)	Dec. 31, 2011 Nov - 16 JPY (¥)
Derivative [Line Items]
Derivative, Notional Amount	$ 75.0	€ 58.5	$ 75.0	€ 58.5	$ 150.0	¥ 17,581.5	$ 150.0	¥ 17,581.5

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant