Earnings Per Share and Stock Issuances - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Aug. 17, 2017	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock				$ 0.0	$ 554.9
Stock repurchase program, remaining authorized repurchase amount		$ 149.3		149.3
Stock repurchase program, authorized amount		$ 600.0		$ 600.0
RB Foods
Class of Stock [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	6,353,591
Proceeds from Issuance of Common Stock	$ 554.0
Over-Allotment Option [Member] | RB Foods
Class of Stock [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	828,729
Stock Options And Restricted Stock Units
Class of Stock [Line Items]
Stock Issued During Period, Shares, Acquisitions		0	6,400,000	0	6,400,000