Accounting Policies - Adjustments for Adoption in Accounting Policies (Details) - USD ($) $ in Millions	Aug. 31, 2020	Dec. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance lease ROU assets	$ 124.3
Total lease liabilities	$ 134.6
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance lease ROU assets		$ 136.5
Total lease liabilities		$ 140.0