Earnings Per Share and Stock Issuances-Common Stock Activity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Employee Stock Purchase Plan [Line Items]
Stock Repurchase Program, Authorized Amount	$ 600		$ 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	0.4	0.4	0.6	0.5
Share Repurchase Program [Member]
Employee Stock Purchase Plan [Line Items]
Stock Repurchased During Period, Shares	0.5	0.5	1.4	1.1