Inventory (Details 1) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 26, 2013	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Inventory By Platform [Abstract]
Inventory In Process			$ 1,100.9	$ 1,132.3
Non-recurring production cost included in inventory			73.0	54.6
Total capitalized pre-production			167.8	223.4
Deferred production			1,315.4	1,244.3
Forward loss provision			(882.7)	(901.6)
Total inventory, net			1,774.4	1,753.0
Net Forward Loss Charge Recorded	$ 590.0
B787 [Member]
Inventory By Platform [Abstract]
Inventory In Process			222.7	227.9
Non-recurring production cost included in inventory			9.8	0.0
Total capitalized pre-production			42.1	102.7
Deferred production			558.5	551.6
Forward loss provision			(606.0)	(606.0)
Total inventory, net			227.1	276.2
Net Forward Loss Charge Recorded		$ 422.0
Boeing - All Other Platforms [Member]
Inventory By Platform [Abstract]
Inventory In Process			491.9	497.4
Non-recurring production cost included in inventory			23.0	7.7
Total capitalized pre-production			5.6	7.4
Deferred production			(32.8)	(8.9)
Forward loss provision			(28.8)	(38.8)
Total inventory, net			458.9	464.8
Contract Liability			0.0	2.1
A350 XWB [Member]
Inventory By Platform [Abstract]
Inventory In Process			148.7	148.7
Non-recurring production cost included in inventory			35.3	35.6
Total capitalized pre-production			94.2	76.4
Deferred production			679.4	607.6
Forward loss provision			(113.8)	(120.1)
Total inventory, net			843.8	748.2
Airbus - All Other Platforms [Member]
Inventory By Platform [Abstract]
Inventory In Process			90.8	82.1
Non-recurring production cost included in inventory			0.0	0.0
Total capitalized pre-production			0.0	0.0
Deferred production			9.2	5.6
Forward loss provision			0.0	0.0
Total inventory, net			100.0	87.7
Rolls-Royce [Member]
Inventory By Platform [Abstract]
Inventory In Process			12.5	17.5
Non-recurring production cost included in inventory			0.0	0.0
Total capitalized pre-production			25.9	35.4
Deferred production			95.7	83.8
Forward loss provision			(134.1)	(136.7)
Total inventory, net			0.0	0.0
Aftermarket [Member]
Inventory By Platform [Abstract]
Inventory In Process			54.3	45.2
Non-recurring production cost included in inventory			0.0	0.2
Total capitalized pre-production			0.0	0.0
Deferred production			0.0	0.0
Forward loss provision			0.0	0.0
Total inventory, net			54.3	45.4
Other Platforms [Member]
Inventory By Platform [Abstract]
Inventory In Process			80.0	113.5
Non-recurring production cost included in inventory			4.9	11.1
Total capitalized pre-production			0.0	1.5
Deferred production			5.4	4.6
Forward loss provision			0.0	0.0
Total inventory, net			$ 90.3	130.7
Rolls-Royce [Member]
Inventory By Platform [Abstract]
Contract Liability				$ 12.2