Condensed Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Cash Flows from Operating Activities:
Net cash provided by (used in) operating activities		$ 3,122	$ (67)
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,305)	(1,998)
Purchases of short-term investments		0	(550)
Proceeds from sale of short-term investments		184	1,774
Other, net		11	14
Net cash used in investing activities		(1,110)	(760)
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		11,116	4,371
Proceeds from equity issuance		532	1,135
Payments of long-term debt, finance leases and other financing liabilities		(4,072)	(564)
Repurchases of common stock		0	(353)
Other, net		(22)	(18)
Net cash provided by financing activities		7,554	4,571
Net increase in cash, cash equivalents and restricted cash		9,566	3,744
Cash, cash equivalents and restricted cash at beginning of the period		11,742	2,868
Cash, cash equivalents and restricted cash at end of the period	[1]	21,308	6,612
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		761	626
Lease modifications and lease conversions		59	470
Right-of-use assets acquired through operating leases		214	48
Notes receivable and warrants received for entering into agreements		139	0
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by (used in) operating activities		3,101	(78)
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,305)	(1,998)
Purchases of short-term investments		0	(550)
Proceeds from sale of short-term investments		184	1,774
Other, net		11	14
Net cash used in investing activities		(1,110)	(760)
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		11,116	4,371
Proceeds from equity issuance		532	1,135
Payments of long-term debt, finance leases and other financing liabilities		(4,072)	(564)
Dividend to UAL		0	(353)
Other, net		(1)	(1)
Net cash provided by financing activities		7,575	4,588
Net increase in cash, cash equivalents and restricted cash		9,566	3,750
Cash, cash equivalents and restricted cash at beginning of the period		11,742	2,862
Cash, cash equivalents and restricted cash at end of the period	[2]	21,308	6,612
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		761	626
Lease modifications and lease conversions		59	470
Right-of-use assets acquired through operating leases		214	48
Notes receivable and warrants received for entering into agreements		$ 139	$ 0

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet: Current assets:Cash and cash equivalents$20,838 $6,505 Restricted cash — Current254 34 Restricted cash — Non-Current216 73 Total cash, cash equivalents and restricted cash $21,308 $6,612 

[2] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the consolidated balance sheet: Current assets:Cash and cash equivalents$20,838 $6,505 Restricted cash — Current254 34 Restricted cash — Non-Current216 73 Total cash, cash equivalents and restricted cash$21,308 $6,612