Condensed Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net cash provided by operating activities		$ 4,625	$ 4,152	[1]
Cash Flows from Investing Activities:
Capital expenditures		(2,467)	(1,671)	[1]
Purchases of short-term and other investments		(1,443)	(1,326)	[1]
Proceeds from sale of short-term and other investments		1,484	1,455	[1]
Investment in affiliates		(27)	(139)	[1]
Loans made to others		0	(10)	[1]
Other, net		17	38	[1]
Net cash used in investing activities		(2,436)	(1,653)	[1]
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt		996	1,241	[1]
Payments of long-term debt		(473)	(1,294)	[1]
Repurchases of common stock		(1,062)	(969)	[1]
Principal payments under finance leases		(63)	(35)	[1]
Capitalized financing costs		(30)	(25)	[1]
Other, net		(30)	(17)	[1]
Net cash used in financing activities		(662)	(1,099)	[1]
Net increase in cash, cash equivalents and restricted cash		1,527	1,400	[1]
Cash, cash equivalents and restricted cash at beginning of the period		1,799	1,591	[1]
Cash, cash equivalents and restricted cash at end of the period	[2]	3,326	2,991	[1]
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt		220	125	[1]
Operating lease conversions to finance lease		36	0	[1]
Right-of-use assets acquired through operating leases		99	103	[1]
Property and equipment acquired through finance leases		8	0	[1]
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities		4,596	4,135	[3]
Cash Flows from Investing Activities:
Capital expenditures		(2,467)	(1,671)	[3]
Purchases of short-term and other investments		(1,443)	(1,326)	[3]
Proceeds from sale of short-term and other investments		1,484	1,455	[3]
Investment in affiliates		(27)	(139)	[3]
Loans made to others		0	(10)	[3]
Other, net		17	38	[3]
Net cash used in investing activities		(2,436)	(1,653)	[3]
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt		996	1,241	[3]
Payments of long-term debt		(473)	(1,294)	[3]
Dividend to UAL		(1,062)	(969)	[3]
Principal payments under finance leases		(63)	(35)	[3]
Capitalized financing costs		(30)	(25)	[3]
Other, net		(1)	0	[3]
Net cash used in financing activities		(633)	(1,082)	[3]
Net increase in cash, cash equivalents and restricted cash		1,527	1,400	[3]
Cash, cash equivalents and restricted cash at beginning of the period		1,793	1,585	[3]
Cash, cash equivalents and restricted cash at end of the period	[4]	3,320	2,985	[3]
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt		220	125	[3]
Operating lease conversions to finance lease		36	0	[3]
Right-of-use assets acquired through operating leases		99	103	[3]
Property and equipment acquired through finance leases		$ 8	$ 0	[3]

[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2016-02, Leases (Topic 842). See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.

[2] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet: Cash and cash equivalents $ 3,221
  $ 2,884
Restricted cash (included in Prepaid expenses and other) —
  13
Restricted cash 105
  94
Total cash, cash equivalents and restricted cash $ 3,326
  $ 2,991

[3] Amounts adjusted due to the adoption of Accounting Standards Update No. 2016-02, Leases (Topic 842). See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.

[4] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet: Cash and cash equivalents $ 3,215
  $ 2,878
Restricted cash (included in Prepaid expenses and other) —
  13
Restricted cash 105
  94
Total cash, cash equivalents and restricted cash $ 3,320
  $ 2,985