Airport Redevelopment (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended		60 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2010	Dec. 31, 2021	Jan. 31, 2022	Dec. 31, 2017
Financial Guarantee | Revolving Credit Facility
Agreements and Obligations [Line Items]
Aggregate commitments guaranteed		$ 800		$ 800
Financial Guarantee | Revolving Credit Facility | Subsequent event
Agreements and Obligations [Line Items]
Aggregate commitments guaranteed					$ 1,100
JFK IAT Member LLC
Agreements and Obligations [Line Items]
Lease agreement, term			33 years
Increase in lease obligation		1,200
Port Authority
Agreements and Obligations [Line Items]
Special project bonds face amount			$ 800
NYTDC
Agreements and Obligations [Line Items]
Special project bonds face amount	$ 611
JFK Terminal Redevelopment Project
Agreements and Obligations [Line Items]
Total expected project costs		1,500		1,500
LAX Redevelopment Project
Agreements and Obligations [Line Items]
Total expected project costs		2,300		2,300
Expected net projects costs		500		500
Project costs reflected as investing cash flows				250
Amount spent on project costs		487
Project costs paid by credit facility		450
Project costs paid by company		37
LAX Redevelopment Project | City of Los Angeles
Agreements and Obligations [Line Items]
Total appropriation to date by city		1,800		1,800
Maximum reimbursement by city		1,800		1,800
LaGuardia Airport Redevelopment Project
Agreements and Obligations [Line Items]
Expected net projects costs		3,500		3,500
Amount spent on project costs		$ 950		$ 2,500
Port Authority contribution to redevelopment project						$ 500