XML 42 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1
Earnings Per Share (Narrative) (Details) - shares
shares in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Stock Options [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount 0.2 0.8
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 0.5 0.9