Earnings Per Share and Stock Issuances-Common Stock Activity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Employee Stock Purchase Plan [Line Items]
Stock Repurchase Program, Authorized Amount	$ 600
Stock Options And Restricted Stock Units [Member]
Employee Stock Purchase Plan [Line Items]
Shares issued under stock option, employee stock purchase plans and RSUs	0.2	0.1
Share Repurchase Program [Member]
Employee Stock Purchase Plan [Line Items]
Stock Repurchased During Period, Shares	0.9	0.6