Earnings Per Share and Stock Issuances-Common Stock Activity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014	Mar. 25, 2015
Employee Stock Purchase Plan [Line Items]
Stock Repurchase Program, Authorized Amount	$ 400		$ 400		$ 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	0.6	0.7
Share Repurchase Program [Member]
Employee Stock Purchase Plan [Line Items]
Stock Repurchased During Period, Shares	0.0	0.7	1.0	2.6