Employee Benefit And Retirement Plans (Change In Fair Value Of Level 3 Pension Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 0.0	$ 0.0
Fair value of plan assets at end of year	0.0	0.0
Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	42.5	59.7
Realized gains	(0.3)	2.7
Unrealized gains (losses)	0.5	(2.4)
Net, purchases and sales	2.1	(17.5)
Fair value of plan assets at end of year	44.8	42.5
Level 3 [Member] | Hedge Fund Of Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	37.6	54.7
Realized gains	(1.1)	2.0
Unrealized gains (losses)	1.0	(2.3)
Net, purchases and sales	3.2	(16.8)
Fair value of plan assets at end of year	40.7	37.6
Level 3 [Member] | Private Equity Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	4.9	5.0
Realized gains	0.8	0.7
Unrealized gains (losses)	(0.5)	(0.1)
Net, purchases and sales	(1.1)	(0.7)
Fair value of plan assets at end of year	$ 4.1	$ 4.9