CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS (UNAUDITED) (UA) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net cash provided by operating activities		$ 2,847	$ 3,142
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,366)	(1,843)
Purchases of short-term and other investments		(866)	(4,193)
Proceeds from sale of short-term and other investments		3,657	4,061
Proceeds from sale of property and equipment		20	1
Other, net		(4)	6
Net cash provided by (used in) investing activities		1,441	(1,968)
Cash Flows from Financing Activities:
Proceeds from issuance of debt and other financing liabilities, net of discounts and fees		3,111	288
Payments of long-term debt, finance leases and other financing liabilities		(5,031)	(820)
Net cash used in financing activities		(1,938)	(563)
Net increase in cash, cash equivalents and restricted cash		2,350	611
Cash, cash equivalents and restricted cash at beginning of the period		6,335	7,421
Cash, cash equivalents and restricted cash at end of the period	[1]	8,685	8,032
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		0	200
Right-of-use assets acquired through operating leases		132	295
Lease modifications and lease conversions		14	23
Investment interests received in exchange for loans, goods and services		18	21
United Airlines, Inc.
Cash Flows from Operating Activities:
Net cash provided by operating activities		2,829	3,111
Cash Flows from Investing Activities:
Capital expenditures, net of flight equipment purchase deposit returns		(1,366)	(1,843)
Purchases of short-term and other investments		(866)	(4,193)
Proceeds from sale of short-term and other investments		3,657	4,061
Proceeds from sale of property and equipment		20	1
Other, net		(4)	6
Net cash provided by (used in) investing activities		1,441	(1,968)
Cash Flows from Financing Activities:
Proceeds from issuance of debt and other financing liabilities, net of discounts and fees		3,111	288
Payments of long-term debt, finance leases and other financing liabilities		(5,031)	(820)
Net cash used in financing activities		(1,920)	(532)
Net increase in cash, cash equivalents and restricted cash		2,350	611
Cash, cash equivalents and restricted cash at beginning of the period		6,335	7,421
Cash, cash equivalents and restricted cash at end of the period	[2]	8,685	8,032
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through the issuance of debt, finance leases and other		0	200
Right-of-use assets acquired through operating leases		132	295
Lease modifications and lease conversions		14	23
Investment interests received in exchange for loans, goods and services		$ 18	$ 21

[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$8,401 $7,634 Restricted cash — Current40 173 Restricted cash — Non-Current244 225 Total cash, cash equivalents and restricted cash $8,685 $8,032 

[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$8,401 $7,634 Restricted cash — Current40 173 Restricted cash — Non-Current244 225 Total cash, cash equivalents and restricted cash$8,685 $8,032