Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2009
Text Block [Abstract]
Non Cash Income Tax Expense Recorded In Other Comprehensive Income	$ 321

Non cash income tax expense recorded in other comprehensive income.

No definition available.

Name:	dal_NonCashIncomeTaxExpenseRecordedInOtherComprehensiveIncome
Namespace Prefix:	dal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration