Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Estimated Useful Lives and Depreciation Expense For the Company’s Property and Equipment

Estimated useful lives and residual values for the Company’s property and equipment are as follows:

	Estimated Useful Life	Residual Value
Aircraft	25 years	10%
Flight equipment leasehold improvements	Lesser of lease term or economic life	0%
Aircraft rotable parts	Fleet life	10%
Ground property and equipment	3 – 10 years	0%
Ground equipment leasehold improvements	Lesser of lease term or 10 years	0%
Internal-use software	3 – 10 years	0%
Capitalized maintenance	Lesser of lease term or economic life	0%
Buildings	Lesser of 40 years or economic life	10%

The components of depreciation and amortization expense are as follows (in millions):

	Year Ended December 31,
	2022		2021		2020
Depreciation	$	44	$	38	$	32
Intangible amortization	1		—		1
Total depreciation and amortization	$	45	$	38	$	33

The components of property and equipment, net are as follows (in millions):

	December 31,
	2022		2021
Flight equipment	$	255	$	212
Ground and other equipment	122		104
Less: accumulated depreciation	(151)		(130)
Total property and equipment, net	$	226	$	186