Schedule II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2013

Schedule II Valuation and Qualifying Accounts

Schedule II

Valuation and Qualifying Accounts

For the Years Ended December 31, 2013, 2012 and 2011

(In millions) Description	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Deductions (a)		Other (b)		Balance at End of Period
Allowance for doubtful accounts - UAL:
2013	$	13	$	35	$	35	$	—	$	13
2012		7		12		6		—		13
2011		6		8		7		—		7
Allowance for doubtful accounts - United:
2013	$	13	$	35	$	35	$	—	$	13
2012		7		12		6		—		13
2011		6		8		7		—		7
Obsolescence allowance—spare parts - UAL:
2013	$	125	$	38	$	1	$	—	$	162
2012		89		40		4		—		125
2011		64		31		6		—		89
Obsolescence allowance—spare parts - United:
2013	$	125	$	38	$	1	$	—	$	162
2012		89		40		4		—		125
2011		64		31		6		—		89
Valuation allowance for deferred tax assets - UAL:
2013	$	4,603	$	7	$	888	$	84	$	3,806
2012		4,137		487		21		—		4,603
2011		4,171		333		367		—		4,137
Valuation allowance for deferred tax assets - United:
2013	$	4,503	$	8	$	898	$	163	$	3,776
2012		4,048		661		206		—		4,503
2011		4,008		371		331		—		4,048

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

(b) See Note 7 to the financial statements included in Part II, Item 8 of this report for additional information related to other valuation allowance adjustments.