Assets Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2015
Property, Plant and Equipment Assets Held-for-sale Disclosure [Abstract]
Impairment charges and other	$ 1.3	$ 9.8
Proceeds received, net of selling costs from Sale of Assets Held for Sale			$ 12.2
Deferred tax liabilites related to aircraft classified as assets held for sale	$ 2.6		$ 2.6