Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Aug. 31, 2020	Nov. 30, 2019	Aug. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents at fair value	$ 221.0	$ 155.4	$ 162.9
Long-term debt	4,001.2	3,723.5	3,962.4
Long-term debt, fair value	4,339.3	3,859.0	4,153.7
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	4,162.9	3,437.5	3,475.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	176.4	421.5	678.7
Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Cash and cash equivalents		155.4	162.9
Insurance contracts	120.8	121.7	117.2
Bonds and other long-term investments	5.6	2.7	4.3
Assets, Fair Value Disclosure	411.1	307.2	328.8
Liabilities [Abstract]
Total	40.6	3.6	18.0
Fair Value, Measurements, Recurring [Member] | Level 1
Assets [Abstract]
Cash and cash equivalents	221.0	155.4	162.9
Insurance contracts	0.0	0.0	0.0
Bonds and other long-term investments	5.6	2.7	4.3
Interest Rate Derivative Assets, at Fair Value	0.0
Foreign currency derivatives	0.0	0.0	0.0
Assets, Fair Value Disclosure	226.6	158.1	167.2
Liabilities [Abstract]
Foreign currency derivatives	0.0	0.0	0.0
Interest rate derivatives	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	120.8	121.7	117.2
Bonds and other long-term investments	0.0	0.0	0.0
Interest Rate Derivative Assets, at Fair Value	45.6	20.9	28.2
Foreign currency derivatives	18.1	3.3	2.2
Assets, Fair Value Disclosure	184.5	149.1	161.6
Liabilities [Abstract]
Foreign currency derivatives	21.3	3.6	4.6
Cross currency contracts	19.3		13.4
Total	40.6	3.6	18.0
Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2
Liabilities [Abstract]
Cross currency contracts		3.2	14.0
Interest rate contracts | Other current assets / Other long-term assets
Assets [Abstract]
Interest rate contracts, Fair Value			28.2
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		0.0	0.0
Foreign exchange contracts | Other current assets / Other long-term 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	18.1	3.3	2.2
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	21.3	3.6	4.6
Cross currency contracts | Assets [Member] | Fair Value, Measurements, Recurring [Member]
Liabilities [Abstract]
Cross currency contracts	0.0	3.2	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		$ 0.0	13.4
Liabilities [Abstract]
Cross currency contracts	$ 19.3		$ 13.4