Airport Redevelopment - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) concourse terminal_gate	Jan. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2010 USD ($)
New lease standard
Agreements and Obligations [Line Items]
Derecognition of construction assets and liabilities and increase to equity upon adoption		$ 40
Financial Guarantee | Revolving Credit Facility
Agreements and Obligations [Line Items]
Aggregate commitments guaranteed	$ 800
JFK IAT Member LLC
Agreements and Obligations [Line Items]
Lease agreement, term				33 years
Port Authority
Agreements and Obligations [Line Items]
Special project bonds face amount				$ 800
LAX Redevelopment Project
Agreements and Obligations [Line Items]
Amount spent on project costs	176
LAX Redevelopment Project | City of Los Angeles
Agreements and Obligations [Line Items]
Total appropriation to date by city	1,600
Maximum reimbursement by city	1,800
LaGuardia Airport Redevelopment Project
Agreements and Obligations [Line Items]
Amount spent on project costs	$ 562
Number of new gates in redeveloped terminal | terminal_gate	37
Number of new concourses in redeveloped terminal | concourse	4
Increase in concessions space (percent)	30.00%
Port Authority contribution to redevelopment project			$ 600
Expected net projects costs	$ 3,300