Impact of the COVID-19 Pandemic - CARES Act (Details) - USD ($) $ / shares in Units, shares in Millions			1 Months Ended	60 Months Ended
	Apr. 20, 2020	Mar. 27, 2020	Apr. 22, 2020	Apr. 30, 2030
Impact Of Global Pandemic [Line Items]
CARES Act relief grants available to airline industry		$ 25,000,000,000
CARES Act secured loans available to airline industry		25,000,000,000
Expected eligibility amount for secured loans through CARES Act		$ 4,600,000,000
CARES Act deferred employer portion of social security taxes, deferred percentage due in first year after deferral (percent)		50.00%
CARES Act deferred employer portion of social security taxes, deferred percentage due in second year after deferral (percent)		50.00%
Expected additional liquidity through deferred payment of employer portion of social security taxes		$ 200,000,000
Subsequent Event
Impact Of Global Pandemic [Line Items]
Total amount of relief received through payroll support program of CARES Act			$ 5,400,000,000
Grants received through payroll support program of CARES Act			$ 3,800,000,000
Proceeds from payroll support program grant	$ 2,700,000,000
Subsequent Event | Delta Common Stock Warrants
Impact Of Global Pandemic [Line Items]
Number of warrants (in shares)			6.5
Warrant exercise price (USD per share)			$ 24.39
Warrants term (in years)			5 years
Unsecured Debt | CARES Act Unsecured Loan | Subsequent Event
Impact Of Global Pandemic [Line Items]
Debt instrument amount			$ 1,600,000,000
Debt instrument term			10 years
Interest rate per annum (percent)			1.00%
Unsecured Debt | CARES Act Unsecured Loan | SOFR | Forecast
Impact Of Global Pandemic [Line Items]
Basis spread on variable rate (percent)				2.00%