Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	May 31, 2015 EUR (€)	Nov. 30, 2017 EUR (€)	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)	May 31, 2017 EUR (€)	May 31, 2017 USD ($)	May 31, 2015 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			$ 0.3	$ 1.8
Foreign Currency Transaction Gain (Loss), before Tax			1.7	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3			(30.9)
Contingent consideration, liability	€ 25.2		0.0	28.9	$ 27.1	€ 26.1	$ 29.3	$ 27.7
Payments of contingent consideration	€ 5.0	€ 17.6	19.7	0.0	$ 0.0
Change in unrealized gain (loss)			1.6
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents			186.8	118.4
Insurance contracts			119.5	106.0
Bonds and other long-term investments			7.5	10.2
Foreign currency derivatives			12.7	4.9
Total			326.5	239.5
Foreign currency derivatives			4.7	5.4
Interest rate derivatives			2.5	1.2
Total			7.2	35.5
Contingent consideration, liability				28.9
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents			186.8	118.4
Insurance contracts			0.0	0.0
Bonds and other long-term investments			7.5	10.2
Foreign currency derivatives			0.0	0.0
Total			194.3	128.6
Foreign currency derivatives			0.0	0.0
Interest rate derivatives			0.0
Total			0.0	0.0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents			0.0	0.0
Insurance contracts			119.5	106.0
Bonds and other long-term investments			0.0	0.0
Foreign currency derivatives			12.7	4.9
Total			132.2	110.9
Foreign currency derivatives			4.7	5.4
Interest rate derivatives			2.5	1.2
Total			7.2	6.6
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents			0.0	0.0
Insurance contracts			0.0	0.0
Bonds and other long-term investments			0.0	0.0
Foreign currency derivatives			0.0	0.0
Total			0.0	0.0
Foreign currency derivatives			0.0	0.0
Interest rate derivatives			0.0
Total			$ 0.0	28.9
Contingent consideration, liability				$ 28.9