Condensed Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net cash provided by (used in) operating activities		$ 2,336	$ (1,956)
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,571)	(1,630)
Purchases of short-term and other investments		(47)	(552)
Proceeds from sale of short-term and other investments		271	2,182
Other, net		23	10
Net cash provided by (used in) investing activities		(1,324)	10
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		11,098	12,730
Proceeds from equity issuance		532	1,135
Payments of long-term debt, finance leases and other financing liabilities		(4,632)	(1,017)
Repurchases of common stock		0	(353)
Other, net		(27)	(19)
Net cash provided by financing activities		6,971	12,476
Net increase in cash, cash equivalents and restricted cash		7,983	10,530
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]	19,725	13,398
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		801	1,513
Lease modifications and lease conversions		111	503
Right-of-use assets acquired through operating leases		627	64
Notes receivable and warrants received for entering into aircraft and other ancillary business agreements		129	0
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by (used in) operating activities		2,309	(1,968)
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,571)	(1,630)
Purchases of short-term and other investments		(47)	(552)
Proceeds from sale of short-term and other investments		271	2,182
Other, net		23	10
Net cash provided by (used in) investing activities		(1,324)	10
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		11,098	12,730
Proceeds from equity issuance		532	1,135
Payments of long-term debt, finance leases and other financing liabilities		(4,632)	(1,017)
Dividend to UAL		0	(353)
Other, net		0	(1)
Net cash provided by financing activities		6,998	12,494
Net increase in cash, cash equivalents and restricted cash		7,983	10,536
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]	19,725	13,398
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		801	1,513
Lease modifications and lease conversions		111	503
Right-of-use assets acquired through operating leases		627	64
Notes receivable and warrants received for entering into aircraft and other ancillary business agreements		$ 129	$ 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$19,256 $13,150 Restricted cash — Current254 76 Restricted cash — Non-Current215 172 Total cash, cash equivalents and restricted cash $19,725 $13,398 

[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$19,256 $13,150 Restricted cash — Current254 76 Restricted cash — Non-Current215 172 Total cash, cash equivalents and restricted cash$19,725 $13,398