Earnings Per Share and Stock Issuances - Common Stock Activity (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Stock Options And Restricted Stock Units
Employee Stock Purchase Plan [Line Items]
Shares issued, net of shares withheld for taxes, under stock options, RSUs, LTPP and employee stock purchase plans	0.7	0.2	0.8	0.5
Share Repurchase Program
Employee Stock Purchase Plan [Line Items]
Shares repurchased under the stock repurchase program	0.2	0.1	0.4	0.3