Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Cash Provided by (Used in) Operating Activities	$ 2,212	$ 1,463
Net Cash Provided by (Used in) Investing Activities [Abstract]
Flight Equipment, Including Advance Payments	(765)	(609)
Ground Property and Equipment, Including Technology	(220)	(395)
Purchase of Investments	(479)	(479)
Virgin Atlantic investment	(360)	0
Redemption of Investments	612	514
Other Investing Activities, Net	21	(32)
Net Cash Used in Investing Activities	(1,191)	(1,001)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments on Long-term Debt and Capital Lease Obligations	(621)	(741)
Fuel Card Obligation	149	158
Other Financing Activities, net	0	3
Net Cash Used in Financing Activities	(472)	(580)
Net Increase (Decrease) in Cash and Cash Equivalents	549	(118)
Cash and cash equivalents at beginning of period	2,416	2,657
Cash and cash equivalents at end of period	2,965	2,539
Other Noncash Investing and Financing Items [Abstract]
SkyMiles Used Pursuant to Advance Purchase Under American Express Agreements	167	167
Build-to-Suit Leased Facilities	$ 85	$ 154