Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Fair Value Measurments (Narrative) (Details)

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Fair Value Measurements Fair Value Measurments (Narrative) (Details) (Territory Ahead [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Jun. 30, 2012
Territory Ahead [Member]
 
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Discontinued Operation, Provision for Loss (Gain) on Disposal, before Income Tax $ 5.9
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax $ 3.7