Fair Value (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets Held For Sale Carrying Value Fair Value	$ 8.0
Assets and Liabilities Measured at fair value on a recurring basis
Restricted cash	15.3	15.1
Long Lived Fixed Assets Held and Used at Fair Value	(1.2)
Assets Held-for-sale, Long Lived, Fair Value Disclosure	6.8
Long Lived Fixed Assets Held and Used at Carrying Value	112.5
Long Lived Assets Held and Used Fair Value Adjustment	(97.6)
Long Lived Fixed Assets Held and Used at Fair Value	14.9
Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	238.2	384.6
Restricted cash	15.3	15.1
Short-term investments	9.6	13.9
Foreign currency hedges	7.2	0.9
Total Assets	270.3	414.5
Foreign currency hedges	0	9.3
Total Liabilities	0	9.3
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	189.0	320.4
Restricted cash	0	0
Short-term investments	0	0
Foreign currency hedges	0	0
Total Assets	189.0	320.4
Foreign currency hedges	0	0
Total Liabilities	0	0
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	49.2	64.2
Restricted cash	15.3	15.1
Short-term investments	9.6	13.9
Foreign currency hedges	7.2	0.9
Total Assets	81.3	94.1
Foreign currency hedges	0	9.3
Total Liabilities	0	9.3
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Restricted cash	0	0
Short-term investments	0	0
Foreign currency hedges	0	0
Total Assets	0	0
Foreign currency hedges	0	0
Total Liabilities	0	0
Aerospace Overhaul [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Long Lived Fixed Assets Held and Used at Fair Value	(1.2)
Assets Held-for-sale, Long Lived, Fair Value Disclosure	6.8
Goodwill [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Long Lived Fixed Assets Held and Used at Carrying Value	92.5
Long Lived Assets Held and Used Fair Value Adjustment	(86.3)
Long Lived Fixed Assets Held and Used at Fair Value	6.2
Indefinite-lived Intangible Assets [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Long Lived Fixed Assets Held and Used at Carrying Value	14.2
Long Lived Assets Held and Used Fair Value Adjustment	(5.5)
Long Lived Fixed Assets Held and Used at Fair Value	8.7
Other Intangible Assets [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Long Lived Fixed Assets Held and Used at Carrying Value	4.4
Long Lived Assets Held and Used Fair Value Adjustment	(4.4)
Long Lived Fixed Assets Held and Used at Fair Value	0
Property, Plant and Equipment [Member]
Assets and Liabilities Measured at fair value on a recurring basis
Long Lived Fixed Assets Held and Used at Carrying Value	1.4
Long Lived Assets Held and Used Fair Value Adjustment	(1.4)
Long Lived Fixed Assets Held and Used at Fair Value	$ 0