Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning of period		$ (122.6)	$ (122.5)	$ (122.4)	$ (125.3)
Other comprehensive income (loss) before reclassifications		(2.5)	(5.5)	(4.2)	(4.9)
Amounts reclassified to earnings (a)	[1]	0.6	1.2	2.1	3.4
Accumulated Other Comprehensive Income (Loss), Net of Tax, end of period		(124.5)	(126.8)	(124.5)	(126.8)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning of period		(34.3)	(22.5)	(32.6)	(23.1)
Other comprehensive income (loss) before reclassifications		(2.5)	(5.5)	(4.2)	(4.9)
Amounts reclassified to earnings (a)	[1]	0.0	0.0	0.0	0.0
Accumulated Other Comprehensive Income (Loss), Net of Tax, end of period		(36.8)	(28.0)	(36.8)	(28.0)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, beginning of period		(88.3)	(100.0)	(89.8)	(102.2)
Other comprehensive income (loss) before reclassifications		0.0	0.0	0.0	0.0
Amounts reclassified to earnings (a)	[1]	0.6	1.2	2.1	3.4
Accumulated Other Comprehensive Income (Loss), Net of Tax, end of period		$ (87.7)	$ (98.8)	$ (87.7)	$ (98.8)

[1] Amounts reclassified from accumulated other comprehensive income (loss) related to defined benefit plans were included in net periodic benefit expense.