Condensed Statements of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Flows from Operating Activities:
Net cash provided by operating activities	$ 694	$ 393
Cash Flows from Investing Activities:
Capital expenditures	(364)	(375)
Increase in short-term and other investments, net	(111)	(77)
Proceeds from sale of property and equipment	35	9
Decrease in restricted cash, net	6	12
Other, net	7
Net cash used in investing activities	(427)	(431)
Cash Flows from Financing Activities:
Payments of long-term debt	(613)	(1,241)
Proceeds from issuance of long-term debt	147	109
Principal payments under capital leases	(24)	(29)
Other, net	12	(33)
Net cash used in financing activities	(478)	(1,194)
Net decrease in cash and cash equivalents	(211)	(1,232)
Cash and cash equivalents at beginning of the period	3,220	4,770
Cash and cash equivalents at end of the period	3,009	3,538
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt	375	146
Exchanges of certain convertible notes for common stock	202
Airport construction financing	2	5
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities	686	389
Cash Flows from Investing Activities:
Capital expenditures	(364)	(375)
Increase in short-term and other investments, net	(111)	(77)
Proceeds from sale of property and equipment	35	9
Decrease in restricted cash, net	6	12
Other, net	7
Net cash used in investing activities	(427)	(431)
Cash Flows from Financing Activities:
Payments of long-term debt	(613)	(1,241)
Proceeds from issuance of long-term debt	147	109
Principal payments under capital leases	(24)	(29)
Other, net	20	(30)
Net cash used in financing activities	(470)	(1,191)
Net decrease in cash and cash equivalents	(211)	(1,233)
Cash and cash equivalents at beginning of the period	3,214	4,765
Cash and cash equivalents at end of the period	3,003	3,532
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt	375	146
Transfer of UAL subsidiaries to United	186
Exchanges of certain convertible notes for common stock	156
Airport construction financing	$ 2	$ 5