Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) € in Millions, $ in Millions	Feb. 28, 2018 USD ($)	Nov. 30, 2017 USD ($)	Feb. 28, 2017 USD ($)	Nov. 30, 2016 USD ($)	May 31, 2015 EUR (€)	May 31, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 4,454.2	$ 4,769.5	$ 1,054.2
Long-term debt, fair value	4,452.5	4,858.5	1,107.4
Liabilities [Abstract]
Contingent consideration related to D&A acquisition			29.3	$ 28.9	€ 25.2	$ 27.7
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	3,264.7	3,615.2
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	1,187.8	1,243.3
Recurring
Assets [Abstract]
Cash and cash equivalents	179.6	186.8	125.7
Insurance contracts	119.6	119.5	111.1
Bonds and other long-term investments	6.5	7.5	9.0
Foreign currency derivatives	11.0	12.7	3.5
Total assets	316.7	326.5	249.3
Liabilities [Abstract]
Foreign currency derivatives	4.8	4.7	8.5
Interest rate derivatives	5.7	2.5	2.1
Contingent consideration related to D&A acquisition			29.3
Total liabilities	10.5	7.2	39.9
Recurring | Level 1
Assets [Abstract]
Cash and cash equivalents	179.6	186.8	125.7
Insurance contracts	0.0	0.0	0.0
Bonds and other long-term investments	6.5	7.5	9.0
Foreign currency derivatives	0.0	0.0	0.0
Total assets	186.1	194.3	134.7
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	119.6	119.5	111.1
Bonds and other long-term investments	0.0	0.0	0.0
Foreign currency derivatives	11.0	12.7	3.5
Total assets	130.6	132.2	114.6
Liabilities [Abstract]
Foreign currency derivatives	4.8	4.7	8.5
Interest rate derivatives	5.7	2.5	2.1
Total liabilities	10.5	7.2	10.6
Recurring | Level 3
Assets [Abstract]
Cash and cash equivalents	0.0	0.0	0.0
Insurance contracts	0.0	0.0	0.0
Bonds and other long-term investments	0.0	0.0	0.0
Foreign currency derivatives	0.0	0.0	0.0
Total assets	0.0	0.0	0.0
Liabilities [Abstract]
Foreign currency derivatives	0.0	0.0	0.0
Interest rate derivatives	0.0
Contingent consideration related to D&A acquisition			29.3
Total liabilities	$ 0.0	$ 0.0	$ 29.3