Accumulated Other Comprehensive Income (Loss) - Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income	$ (125.3)	$ (138.5)	$ (122.4)	$ (125.3)	$ (138.5)
Other comprehensive income (loss) before reclassifications			(37.6)	(1.4)	15.5
Amounts reclassified from accumulated other comprehensive income (loss)			21.2	4.3	(2.3)
Accumulated other comprehensive (loss) income			(138.8)	(122.4)	(125.3)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income	(23.1)	(29.6)	(32.6)	(23.1)	(29.6)
Other comprehensive income (loss) before reclassifications			(4.3)	(9.5)	12.8
Amounts reclassified from accumulated other comprehensive income (loss)	0.0	0.0	17.9	0.0	(6.3)
Accumulated other comprehensive (loss) income			(19.0)	(32.6)	(23.1)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income	$ (102.2)	$ (108.9)	(89.8)	(102.2)	(108.9)
Other comprehensive income (loss) before reclassifications			(33.3)	8.1	2.7
Amounts reclassified from accumulated other comprehensive income (loss)			3.3	4.3	4.0
Accumulated other comprehensive (loss) income			$ (119.8)	$ (89.8)	$ (102.2)