Inventory (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Inventory By Platform [Abstract]
Inventory	$ 1,080.3	$ 1,100.9
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	65.4	73.0
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	147.9	167.8
Deferred Production Costs	1,389.6	1,315.4
Forward loss provision	(875.2)	(882.7)
Total inventory, net	1,808.0	1,774.4
Reduction In Previously Reported Forward-Loss	15.0
B787 [Member]
Inventory By Platform [Abstract]
Inventory	213.8	222.7
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	9.9	9.8
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	26.6	42.1
Deferred Production Costs	591.8	558.5
Forward loss provision	(606.0)	(606.0)
Total inventory, net	236.1	227.1
Airbus Three Hundred Fifty XWB [Member]
Inventory By Platform [Abstract]
Inventory	153.3	148.7
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	37.3	35.3
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	92.2	94.2
Deferred Production Costs	685.2	679.4
Forward loss provision	(113.7)	(113.8)
Total inventory, net	854.3	843.8
Airbus - All other platforms [Member]
Inventory By Platform [Abstract]
Inventory	89.6	90.8
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	0.0	0.0
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	0.0	0.0
Deferred Production Costs	9.0	9.2
Forward loss provision	0.0	0.0
Total inventory, net	98.6	100.0
Rolls-Royce
Inventory By Platform [Abstract]
Inventory	15.4	12.5
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	0.0	0.0
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	23.7	25.9
Deferred Production Costs	99.1	95.7
Forward loss provision	(138.2)	(134.1)
Total inventory, net	0.0	0.0
Contract Liability	4.6	12.2
Aftermarket [Member]
Inventory By Platform [Abstract]
Inventory	56.1	54.3
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	0.0	0.0
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	0.0	0.0
Deferred Production Costs	0.0	0.0
Forward loss provision	0.0	0.0
Total inventory, net	56.1	54.3
Other platforms [Member]
Inventory By Platform [Abstract]
Inventory	67.3	80.0
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	1.2	4.9
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	0.0	0.0
Deferred Production Costs	6.4	5.4
Forward loss provision	0.0	0.0
Total inventory, net	74.9	90.3
Boeing - All other platforms [Member]
Inventory By Platform [Abstract]
Inventory	484.8	491.9
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	17.0	23.0
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	5.4	5.6
Deferred Production Costs	(1.9)	(32.8)
Forward loss provision	(17.3)	(28.8)
Total inventory, net	$ 488.0	$ 458.9