Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Aug. 31, 2018	Nov. 30, 2017	Aug. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 4,345.3	$ 4,769.5	$ 5,027.8
Long-term debt, fair value	4,294.5	4,858.5	5,154.7
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	3,218.0	3,615.2	3,647.1
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	1,076.5	1,243.3	1,507.6
Recurring
Assets [Abstract]
Cash and cash equivalents	73.0	186.8	166.1
Insurance contracts	123.7	119.5	115.2
Bonds and other long-term investments	4.4	7.5	8.1
Interest Rate Derivative Assets, at Fair Value			0.3
Foreign currency derivatives	2.1	12.7	5.5
Total assets	203.2	326.5	295.2
Liabilities [Abstract]
Foreign currency derivatives	5.7	4.7	9.1
Interest rate derivatives	6.0	2.5
Total liabilities	11.7	7.2	9.1
Recurring | Level 1
Assets [Abstract]
Cash and cash equivalents	73.0	186.8	166.1
Insurance contracts	0.0	0.0	0.0
Bonds and other long-term investments	4.4	7.5	8.1
Interest Rate Derivative Assets, at Fair Value			0.0
Foreign currency derivatives	0.0	0.0	0.0
Total assets	77.4	194.3	174.2
Liabilities [Abstract]
Foreign currency derivatives	0.0	0.0	0.0
Interest rate derivatives	0.0
Total liabilities	0.0	0.0	0.0
Recurring | Level 2
Assets [Abstract]
Cash and cash equivalents	0.0	0.0	0.0
Insurance contracts	123.7	119.5	115.2
Bonds and other long-term investments	0.0	0.0	0.0
Interest Rate Derivative Assets, at Fair Value			0.3
Foreign currency derivatives	2.1	12.7	5.5
Total assets	125.8	132.2	121.0
Liabilities [Abstract]
Foreign currency derivatives	5.7	4.7	9.1
Interest rate derivatives	6.0	2.5
Total liabilities	$ 11.7	$ 7.2	$ 9.1