Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Treasury shares withheld for payment of taxes, weighted average price per share (USD per share)	$ 49.75	$ 55.08

The weighted average price per treasury share withheld for payment of taxes.

No definition available.

Name:	dal_WeightedAveragePricePerTreasuryShareWithheldForTaxes
Namespace Prefix:	dal_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration