Investments - JCP Funds - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014	Nov. 30, 2014
Schedule of Equity Method Investments [Line Items]
Unfunded portion of equity commitment to subsidiary	$ 89.6		$ 89.6
Total committed equity capitalization	1,200.0		1,200.0
JCP Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment	27.7		27.7		$ 48.9
Gain (loss) from investment	(3.4)	$ 0.9	(26.3)	$ (7.1)
Unfunded portion of equity commitment to subsidiary	11.8		11.8
Total committed equity capitalization	$ 85.0		$ 85.0		$ 85.0
Percent of financial information presented			100.00%
Ownership percentage	35.20%		35.20%