Financial Instruments and Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below presents disclosures about the financial assets and liabilities measured at fair value on a recurring basis in UAL's financial statements (in millions):

	June 30, 2021								December 31, 2020
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Cash and cash equivalents	$	20,838	$	20,838	$	—	$	—	$	11,269	$	11,269	$	—	$	—
Restricted cash - current	254		254		—		—		255		255		—		—
Restricted cash - non-current	216		216		—		—		218		218		—		—
Short-term investments:
Corporate debt	199		—		199		—		330		—		330		—
Asset-backed securities	23		—		23		—		51		—		51		—
U.S. government and agency notes	8		—		8		—		33		—		33		—
Long-term investments:
Equity securities	269		269		—		—		205		205		—		—
Warrants	176		96		80		—		36		—		—		36

Carrying Values and Estimated Fair Values of Financial Instruments

The table below presents the carrying values and estimated fair values of financial instruments not presented in the tables above (in millions). Carrying amounts include any related discounts, premiums and issuance costs:

	June 30, 2021										December 31, 2020
	Carrying Amount		Fair Value								Carrying Amount		Fair Value
			Total		Level 1		Level 2		Level 3				Total		Level 1		Level 2		Level 3
Long-term debt	$	34,184	$	35,798	$	—	$	30,268	$	5,530	$	26,747	$	27,441	$	—	$	21,985	$	5,456