Income Tax (Narrative) (USD $) In Millions	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Income Tax Abstract
Unrecognized Tax Benefits That Would Impact Effective Tax Rate	$ 24.8	$ 19.3
Change In Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns	8.2	(42.6)
Change In Unrecognized Tax Benefits That Would Impact Effective Tax Rate	$ 3.5	$ 2.0

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph b

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant