Commitments and Contingencies Commitments and Contingencies - Rotable Spare Inventory Purchase (Details) (USD $) In Millions, unless otherwise specified	Jul. 22, 2014
Commitments and Contingencies Disclosure [Abstract]
Other rotable inventory	$ 13.1

Gross amount of components used by the entity which are bought from another entity rather than produced by the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5

Name:	us-gaap_OtherInventoryPurchasedGoods
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant