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Supplemental Information (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Jan. 26, 2017
Dec. 31, 2016
Dec. 31, 2015
Supplemental Information [Abstract]      
Income tax payments, net of refunds   $ 96.7 $ 66.9
Subsequent Event [Line Items]      
Dividends per share   $ 0.86 $ 0.81
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Dividends per share $ 0.95    
Dividends payable, date to be paid May 08, 2017    
Dividends payable, date of record Apr. 03, 2017