Schedule II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2016

Schedule II

Valuation and Qualifying Accounts

For the Years Ended December 31, 2016, 2015 and 2014


(In millions) Description	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Deductions (a)		Other		Balance at End of Period
Allowance for doubtful accounts—UAL and United:
2016	$	18	$	18	$	26	$	—	$	10
2015		22		25		29		—		18
2014		13		45		36		—		22
Obsolescence allowance—spare parts—UAL and United:
2016	$	235	$	61	$	16	$	15	$	295
2015		169		38		—		28		235
2014		162		35		28		—		169
Valuation allowance for deferred tax assets—UAL:
2016	$	48	$	47	$	27	$	—	$	68
2015		4,751		—		4,703		—		48
2014		4,591		156		—		4		4,751
Valuation allowance for deferred tax assets—United:
2016	$	48	$	47	$	27	$	—	$	68
2015		4,721		—		4,673		—		48
2014		4,561		167		—		(7)		4,721

(a) Deduction from reserve for purpose for which reserve was created.