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Commitments and Contingencies (Details)	3 Months Ended		12 Months Ended
	Jun. 30, 2012 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2015 USD ($) aircraft	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Airport Project [Line Items]
Assets constructed for others			$ 915,000,000	$ 621,000,000
Depreciation and amortization			1,015,000,000	$ 938,000,000	$ 867,000,000
LAX
Airport Project [Line Items]
Expected total airport modernization project cost			526,000,000
Assets constructed for others			196,000,000
FLL
Airport Project [Line Items]
Expected total airport modernization project cost			295,000,000
Assets constructed for others			25,000,000
DAL
Airport Project [Line Items]
Municipal bonds issued	$ 146,000,000	$ 310,000,000
Assets constructed for others			548,000,000
Airport construction obligation			536,000,000
Depreciation and amortization			36,000,000
HOU
Airport Project [Line Items]
Expected total airport modernization project cost			156,000,000
Assets constructed for others			$ 146,000,000
B-737-800
Airport Project [Line Items]
Number of Aircrafts Purchased | aircraft			19
B-737-700
Airport Project [Line Items]
Number of Aircrafts Purchased | aircraft			8
Number of aircrafts leased | aircraft			16
B737-300
Airport Project [Line Items]
Number of aircrafts retired from service | aircraft			2
B737-500
Airport Project [Line Items]
Number of aircrafts retired from service | aircraft			2

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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