Discontinued Operations (Details) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended
	Feb. 29, 2016	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015	May. 31, 2015
Discontinued Operations
Recognized impairment charge				$ 46,400,000		$ 46,400,000
Interest Expense	$ 1,700,000			6,400,000	$ 5,200,000	19,400,000
Operating income from discontinued operations
Operating income (loss) from discontinued operations	(800,000)			(500,000)	(9,300,000)	4,100,000
Telair Cargo Group and PSM | Discontinued Operations, Held-for-sale or Disposed of by Sale
Discontinued Operations
Interest Expense	0			2,800,000	0	8,400,000
General corporate overhead					0
Liabilities of discontinued operations	5,800,000		$ 5,400,000		5,800,000		$ 5,400,000
Operating income from discontinued operations
Sales	12,600,000			91,800,000	34,300,000	252,600,000
Costs of Sales	(12,100,000)			(80,000,000)	(39,200,000)	(216,600,000)
Selling, general and administrative expenses	(1,300,000)			(9,300,000)	(4,400,000)	(22,700,000)
Interest expense, net				(3,000,000)		(9,200,000)
Operating income (loss) from discontinued operations	$ (800,000)			$ (500,000)	$ (9,300,000)	$ 4,100,000
Telair Cargo Group | Discontinued Operations, Disposed of by Sale
Discontinued Operations
Cash consideration received			705,000,000
Pre-tax gain on sale of business (net of transaction expenses and fees)			198,600,000
Telair Cargo Group | A400M | Discontinued Operations, Disposed of by Sale
Discontinued Operations
Gain recognized on sale of business		$ 27,700,000
Telair Cargo Group | A400M | Maximum | Discontinued Operations, Disposed of by Sale
Discontinued Operations
Contingent consideration			$ 35,000,000
Precision Systems Manufacturing | Discontinued Operations, Held-for-sale
Discontinued Operations
Recognized impairment charge							$ 57,500,000