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Income Per Share (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted $ 1.7 $ 0.0 $ 0.3
Earnings Per Share, Diluted, Undistributed $ 0.01    
Antidilutive weighted average shares 3.4 3.0 1.8