Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	May 31, 2016	Nov. 30, 2015
Variable Interest Entity [Line Items]
Assets from entities consolidated during period	$ 122.1
Liabilities from entities consolidated during period	96.4
Consolidated VIEs assets	645.1	$ 652.3
Consolidated VIEs liabilities	146.5	84.4
Variable Interest Entity, Not Primary Beneficiary Including Third Parties
Variable Interest Entity [Line Items]
Decrease in consolidated inventory	75.7
Non-refundable option deposits and pre-acquisition costs	83.4	89.2
Financial Standby Letters of Credit | Variable Interest Entity, Not Primary Beneficiary Including Third Parties
Variable Interest Entity [Line Items]
Letters of credit outstanding	$ 73.9	$ 70.4