Acquisitions - Cost Expensed (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017	Nov. 30, 2017
Business Acquisition [Line Items]
Business Combination, Acquisition Expenses Included in Cost of Good Sold		$ 5.9		$ 5.9
Other debt costs	$ 0.0	15.4	$ 0.0	$ 15.4
RB Foods
Business Acquisition [Line Items]
Business Combination, Acquisition Expenses Included in Cost of Good Sold	0.0	5.9	0.0
Anticipated Transaction Cost			100.0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory					$ 20.9
Transaction expenses included in cost of goods sold	0.1	22.3	0.3
Business Combination, Acquisition Expenses Included in Other Debt Cost	0.0	15.4	0.0
Integration expenses	5.5	2.2	21.8
Total	$ 5.6	$ 45.8	$ 22.1		77.1
Other debt costs					$ 15.4