Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Assets (Liabilities) Measured at Fair Value on a Recurring Basis

Assets (Liabilities) Measured at Fair Value on a Recurring Basis

(in millions)	June 30, 2014			Level 1		Level 2
Cash equivalents	$	2,813		$	2,813	$	—
Short-term investments	719			719		—
Restricted cash equivalents and investments	99			99		—
Long-term investments	127			97		30
Hedge derivatives, net
Fuel hedge contracts	255			19		236
Interest rate contracts	(33		)	—		(33		)
Foreign currency exchange contracts	146			—		146

(in millions)	December 31, 2013			Level 1		Level 2
Cash equivalents	$	2,487		$	2,487	$	—
Short-term investments	959			959		—
Restricted cash equivalents and investments	118			118		—
Long-term investments	109			80		29
Hedge derivatives, net
Fuel hedge contracts	314			16		298
Interest rate contracts	(67		)	—		(67		)
Foreign currency exchange contracts	257			—		257