Statements of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities:
Net income (loss)	$ 1,132	$ 571	$ (723)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities -
Depreciation and amortization	1,679	1,689	1,522
Special charges, non-cash portion	78	50	389
Deferred income taxes	13	(14)	13
Other operating activities	(21)	18	(115)
Changes in operating assets and liabilities -
Increase in fuel hedge collateral	(577)
Unrealized (gain) loss on fuel derivatives and change in related pending settlements	436	(56)	120
Increase in advance ticket sales	296	45	246
Increase (decrease) in accounts payable	(251)	(265)	285
(Increase) decrease in receivables	209	(142)	(21)
Decrease in frequent flyer deferred revenue and advanced purchase of miles	(88)	(415)	(712)
Increase (decrease) in other liabilities	(238)	(201)	415
(Increase) decrease in other assets	(34)	164	(484)
Net cash provided by operating activities	2,634	1,444	935
Cash Flows from Investing Activities:
Capital expenditures	(2,005)	(2,164)	(2,016)
Purchases of short-term and other investments	(1,041)	(575)	(742)
Redemptions of short-term and other investments	584	455	497
Proceeds from sale of property and equipment	94	152	183
Decrease in restricted cash, net	75	52	122
Other, net	37	58	(1)
Net cash used in investing activities	(2,256)	(2,022)	(1,957)
Cash Flows from Financing Activities:
Payments of long-term debt	(2,503)	(2,185)	(1,392)
Proceeds from issuance of long-term debt	1,432	1,423	1,121
Repurchases of common stock	(312)
Principal payments under capital leases	(127)	(134)	(125)
Capitalized financing costs	(104)	(103)	(71)
Proceeds from the exercise of stock options	60	29	17
Other	(42)	(2)	(4)
Net cash used in financing activities	(1,596)	(972)	(454)
Net decrease in cash and cash equivalents	(1,218)	(1,550)	(1,476)
Cash and cash equivalents at beginning of year	3,220	4,770	6,246
Cash and cash equivalents at end of year	2,002	3,220	4,770
United Airlines, Inc.
Cash Flows from Operating Activities:
Net income (loss)	1,114	654	(661)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities -
Depreciation and amortization	1,679	1,689	1,522
Special charges, non-cash portion	78	50	389
Deferred income taxes	13	1	13
Other operating activities	4	(41)	(151)
Changes in operating assets and liabilities -
Increase in fuel hedge collateral	(577)
Unrealized (gain) loss on fuel derivatives and change in related pending settlements	436	(56)	120
Increase in advance ticket sales	296	45	246
Increase (decrease) in accounts payable	(251)	(265)	285
(Increase) decrease in receivables	209	(142)	(21)
Decrease in frequent flyer deferred revenue and advanced purchase of miles	(88)	(415)	(712)
Increase (decrease) in other liabilities	(236)	(203)	422
(Increase) decrease in other assets	(34)	163	(484)
Decrease in intercompany payables	(118)	(34)	(28)
Increase in intercompany receivables		(5)	(9)
Net cash provided by operating activities	2,525	1,441	931
Cash Flows from Investing Activities:
Capital expenditures	(2,005)	(2,164)	(2,016)
Purchases of short-term and other investments	(1,041)	(575)	(737)
Redemptions of short-term and other investments	584	455	497
Proceeds from sale of property and equipment	94	152	183
Decrease in restricted cash, net	75	52	121
Other, net	37	57
Net cash used in investing activities	(2,256)	(2,023)	(1,952)
Cash Flows from Financing Activities:
Payments of long-term debt	(2,503)	(2,185)	(1,392)
Proceeds from issuance of long-term debt	1,432	1,423	1,121
Dividend to UAL	(212)
Principal payments under capital leases	(127)	(134)	(125)
Capitalized financing costs	(104)	(103)	(71)
Proceeds from the exercise of stock options	60	29	17
Other	(33)	1	(4)
Net cash used in financing activities	(1,487)	(969)	(454)
Net decrease in cash and cash equivalents	(1,218)	(1,551)	(1,475)
Cash and cash equivalents at beginning of year	3,214	4,765	6,240
Cash and cash equivalents at end of year	$ 1,996	$ 3,214	$ 4,765