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Earnings Per Share Earnings Per Share (Narrative) (Details)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock Options [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   1.8 1.1
Contingently Issuable Shares [Member]
     
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0.7 0.7 0.8