Employee Benefit And Retirement Plans-Additional Information (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Nov. 30, 2015	Aug. 23, 2017	Aug. 17, 2017	Feb. 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation						$ 77.7
Pension Contributions	$ 10.9	$ 22.1	$ 25.1
RB Foods
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Funded Status of Plan					$ (19.9)
Defined Benefit Plan, Benefit Obligation					48.1
Defined Benefit Plan, Fair Value of Plan Assets					28.2
Defined Benefit Plan, Accumulated Benefit Obligation					40.8
Defined Benefit Plan Expected Future Employer Contributions Remainder Of Fiscal Year					$ 5.0
United States Pension Plan of US Entity
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation						$ 69.9
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation				$ 27.1