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Earnings Per Share (Antidilutive Securities) (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Outstanding Stock Awards        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share, shares (less than $0.1 million and $0.3 million) 0.2 0.3 0.1 0.3