Condensed Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities:
Net cash provided by operating activities		$ 1,476	$ 447
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(402)	(444)
Purchases of short-term and other investments		(156)	0
Proceeds from sale of short-term and other investments		62	105
Proceeds from sale of property and equipment		66	11
Other, net		0	(1)
Net cash used in investing activities		(430)	(329)
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		0	1,336
Proceeds from issuance of parent company stock		0	532
Payments of long-term debt, finance leases and other financing liabilities		(783)	(569)
Other, net		(73)	(21)
Net cash provided by (used in) financing activities		(856)	1,278
Net increase in cash, cash equivalents and restricted cash		190	1,396
Cash, cash equivalents and restricted cash at beginning of the period		18,533	11,742
Cash, cash equivalents and restricted cash at end of the period	[1]	18,723	13,138
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		0	509
Lease modifications and lease conversions		59	22
Right-of-use assets acquired through operating leases		68	180
Equity interest received in consideration for the sale of aircraft		42	0
Warrants received for entering into ancillary business agreements		0	81
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities		1,405	426
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(402)	(444)
Purchases of short-term and other investments		(156)	0
Proceeds from sale of short-term and other investments		62	105
Proceeds from sale of property and equipment		66	11
Other, net		0	(1)
Net cash used in investing activities		(430)	(329)
Cash Flows from Financing Activities:
Proceeds from issuance of debt, net of discounts and fees		0	1,336
Proceeds from issuance of parent company stock		0	532
Payments of long-term debt, finance leases and other financing liabilities		(783)	(569)
Other, net		(2)	0
Net cash provided by (used in) financing activities		(785)	1,299
Net increase in cash, cash equivalents and restricted cash		190	1,396
Cash, cash equivalents and restricted cash at beginning of the period		18,533	11,742
Cash, cash equivalents and restricted cash at end of the period	[2]	18,723	13,138
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		0	509
Lease modifications and lease conversions		59	22
Right-of-use assets acquired through operating leases		68	180
Equity interest received in consideration for the sale of aircraft		42	0
Warrants received for entering into ancillary business agreements		$ 0	$ 81

[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$18,468 $12,666 Restricted cash — Current41 254 Restricted cash — Non-Current214 218 Total cash, cash equivalents and restricted cash $18,723 $13,138 

[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$18,468 $12,666 Restricted cash — Current41 254 Restricted cash — Non-Current214 218 Total cash, cash equivalents and restricted cash$18,723 $13,138