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Earnings Per Share Earnings Per Share, Textuals (Details)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1.4 1.3 1.7 1.8