Employee Benefit Plans - Reconciliation of Level 3 Pension Plan Assets (Details) - Pension Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	$ 217.2	$ 197.1
Fair Value of Plan Assets at End of Year	207.5	217.2
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	0.3
Fair Value of Plan Assets at End of Year	0.0	0.3
Defined Benefit Plan, Real Estate [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	0.3
Fair Value of Plan Assets at End of Year		0.3
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value of plan assets at beginning of year	0.3	0.3
Redemptions	0.2	0.0
Realized net gains or losses included in funded status	(0.1)	0.0
Fair Value of Plan Assets at End of Year	$ 0.0	$ 0.3