Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Aug. 31, 2019	Nov. 30, 2018	Aug. 31, 2018	Nov. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents at fair value	$ 162.9	$ 96.6	$ 73.0	$ 186.8
Long-term debt	3,962.4	4,136.4	4,345.3
Long-term debt, fair value	4,153.7	4,039.4	4,294.5
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	3,475.0	3,172.7	3,218.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	678.7	866.7	1,076.5
Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Cash and cash equivalents		96.6	73.0
Insurance contracts	117.2	118.0	123.7
Bonds and other long-term investments	4.3	2.8	4.4
Assets, Fair Value Disclosure	328.8	221.8	203.2
Liabilities [Abstract]
Total	18.0	12.8	11.7
Fair Value, Measurements, Recurring [Member] | Level 1
Assets [Abstract]
Cash and cash equivalents	162.9	96.6	73.0
Insurance contracts	0.0	0.0	0.0
Bonds and other long-term investments	4.3	2.8	4.4
Interest Rate Derivative Assets, at Fair Value	0.0
Foreign currency derivatives	0.0	0.0	0.0
Assets, Fair Value Disclosure	167.2	99.4	77.4
Liabilities [Abstract]
Foreign currency derivatives	0.0	0.0	0.0
Interest rate derivatives	0.0	0.0	0.0
Total	0.0	0.0	0.0
Fair Value, Measurements, Recurring [Member] | Level 2
Assets [Abstract]
Cash and cash equivalents	0.0	0.0	0.0
Insurance contracts	117.2	118.0	123.7
Bonds and other long-term investments	0.0	0.0	0.0
Interest Rate Derivative Assets, at Fair Value	28.2
Foreign currency derivatives	2.2	4.4	2.1
Assets, Fair Value Disclosure	161.6	122.4	125.8
Liabilities [Abstract]
Foreign currency derivatives	4.6	6.4	5.7
Interest rate derivatives	13.4	6.4	6.0
Total	18.0	12.8	11.7
Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2
Liabilities [Abstract]
Cross currency contracts	14.0
Interest rate contracts | Other current assets
Assets [Abstract]
Interest rate contracts, Fair Value		0.0	0.0
Interest rate contracts | Other accrued liabilities
Assets [Abstract]
Interest rate contracts, Fair Value	0.0
Interest rate contracts | Other accrued liabilities | Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Interest rate contracts, Fair Value		6.4	6.0
Foreign exchange contracts | Other current assets | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	2.2	4.4	2.1
Foreign exchange contracts | Other accrued liabilities | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	4.6	$ 6.4	$ 5.7
Cross currency contracts | Assets [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	14.0
Cross currency contracts | Liability [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net	$ 13.4