Retirement Benefits, (As Restated for fiscal 2014 and 2013) - Summary of Company's Plan Assets, Benefit Obligations, and Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Nov. 30, 2015		Nov. 30, 2014		Nov. 30, 2013	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014
Change in fair value of plan assets:
Fair value - beginning of year		$ 1,163.1
(Loss) gain on plan assets		(64.2)		$ 63.5		$ 141.4
Fair value - end of year		964.1		1,163.1
Amounts recognized in the consolidated balance sheets:
Pension benefits, noncurrent		(566.2)		(482.8)			$ (471.9)	$ (475.5)	$ (479.1)	$ (257.7)	$ (262.1)	$ (266.5)
Net liability recognized in the consolidated balance sheets		(2,180.4)		(2,092.5)			$ (2,066.9)	$ (1,997.4)	$ (2,024.5)	$ (1,802.9)	$ (1,733.3)	$ (1,682.2)
Pension Benefits [Member]
Change in fair value of plan assets:
Fair value - beginning of year		1,163.1		1,249.2
(Loss) gain on plan assets		(64.2)		63.5
Employer contributions		1.3		1.2
Benefits paid	[1]	(136.1)		(133.7)
Lump sum distributions	[2]	0.0		(17.1)
Fair value - end of year		964.1		1,163.1		1,249.2
Change in benefit obligation:
Benefit obligation - beginning of year		1,666.3	[3]	1,538.6
Service cost		10.8		8.8		6.3
Interest cost		63.6		67.1		61.0
Plan amendments		2.5		0.0
Actuarial losses (gains)		(57.6)		202.6
Benefits paid	[1]	(136.1)		(133.7)
Lump sum distributions	[2]	0.0		(17.1)
Benefit obligation - end of year		1,549.5	[3]	1,666.3	[3]	1,538.6
Funded status of the plans		(585.4)		(503.2)
Amounts recognized in the consolidated balance sheets:
Postretirement medical and life insurance benefits, current		0.0		0.0
Postretirement medical and life insurance benefits, noncurrent		0.0		0.0
Pension benefits, noncurrent		(566.2)	[3]	(482.8)
Net liability recognized in the consolidated balance sheets		(585.4)		(503.2)
Pension Benefits [Member] | Other Current Liabilities [Member]
Amounts recognized in the consolidated balance sheets:
Pension liability, non-qualified current (component of other current liabilities)		(1.3)		(1.3)
Pension Benefits [Member] | Other Noncurrent Liabilities [Member]
Amounts recognized in the consolidated balance sheets:
Pension benefits, noncurrent		(17.9)		(19.1)
Medical and Life Insurance Benefits [Member]
Change in fair value of plan assets:
Fair value - beginning of year		0.0		0.0
(Loss) gain on plan assets		0.0		0.0
Employer contributions		4.8		5.3
Benefits paid	[1]	(4.8)		(5.3)
Lump sum distributions	[2]	0.0		0.0
Fair value - end of year		0.0		0.0		0.0
Change in benefit obligation:
Benefit obligation - beginning of year		58.1	[3]	66.6
Service cost		0.0		0.1		0.1
Interest cost		1.9		2.5		2.4
Plan amendments		0.0		0.0
Actuarial losses (gains)		(3.7)		(5.8)
Benefits paid	[1]	(4.8)		(5.3)
Lump sum distributions	[2]	0.0		0.0
Benefit obligation - end of year		51.5	[3]	58.1	[3]	$ 66.6
Funded status of the plans		(51.5)		(58.1)
Amounts recognized in the consolidated balance sheets:
Postretirement medical and life insurance benefits, current		(6.0)		(6.4)
Postretirement medical and life insurance benefits, noncurrent		(45.5)		(51.7)
Pension benefits, noncurrent		0.0		0.0
Net liability recognized in the consolidated balance sheets		(51.5)		(58.1)
Medical and Life Insurance Benefits [Member] | Other Current Liabilities [Member]
Amounts recognized in the consolidated balance sheets:
Pension liability, non-qualified current (component of other current liabilities)		0.0		0.0
Medical and Life Insurance Benefits [Member] | Other Noncurrent Liabilities [Member]
Amounts recognized in the consolidated balance sheets:
Pension benefits, noncurrent		$ 0.0		$ 0.0

[1] Benefits paid for medical and life insurance benefits are net of the Medicare Part D Subsidy of $0.2 million received in fiscal 2015 and 2014.

[2] During fiscal 2014, the Company offered and distributed lump sum pension payouts to terminated vested participants in the pension plan with a lump sum present value of less than $25,000.

[3] Pension benefit obligation includes $19.2 million and $20.4 million as of November 30, 2015 and 2014, respectively, for the non-qualified plan.