Segment Reporting (Revenues and Other Financial Information by Business Segment) (Details) - USD ($)	1 Months Ended	3 Months Ended								12 Months Ended
	Jan. 31, 2015	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jan. 31, 2016	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 133,000,000	$ 358.20	$ 365.00	$ 412.70	$ 431.50	$ 440,700,000	$ 453,200,000	$ 430,900,000	$ 370,900,000	$ 1,567,400,000	$ 1,695,700,000	$ 1,291,600,000
Operating earnings	17,700,000									(536,800,000)	246,800,000	238,500,000
Total assets	4,224,600,000	3,691,000,000				4,280,600,000				3,691,000,000	4,280,600,000	3,064,000,000
Goodwill	1,286,500,000	954,900,000				1,328,700,000				954,900,000	1,328,700,000	1,069,800,000
Capital expenditures	6,200,000									130,500,000	136,800,000	29,400,000
Depreciation and amortization	7,300,000									75,000,000	68,000,000	27,800,000
Aerospace Solutions Group
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	93,100,000									1,312,500,000	1,310,200,000	1,268,100,000
Operating earnings	12,900,000									211,600,000	192,000,000	240,200,000
Total assets	3,252,200,000	3,422,800,000				3,298,400,000				3,422,800,000	3,298,400,000	2,937,300,000
Goodwill	965,800,000	952,400,000				986,300,000				952,400,000	986,300,000	1,027,700,000
Capital expenditures	1,700,000									30,400,000	17,700,000	25,300,000
Depreciation and amortization	2,400,000									28,100,000	28,000,000	25,800,000
Energy Services Group
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	39,900,000									254,900,000	385,500,000	23,500,000
Operating earnings	4,800,000									(748,400,000)	54,800,000	(1,700,000)
Total assets	972,400,000	268,200,000				982,200,000				268,200,000	982,200,000	126,700,000
Goodwill	320,700,000	2,500,000				342,400,000				2,500,000	342,400,000	42,100,000
Capital expenditures	4,500,000									100,100,000	119,100,000	4,100,000
Depreciation and amortization	4,900,000									46,900,000	40,000,000	2,000,000
Corporate, Non-Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total assets	$ 451,600,000	$ 559,500,000				$ 508,400,000				$ 559,500,000	$ 508,400,000	$ 0