The following table provides information about receivables and contract liabilities from our contracts with customers, which reflects the aggregate amount of the transaction price allocated to the performance obligations that are unsatisfied as of May 5, 2018, and February 4, 2018 ($ in millions):



	May 5, 2018		February 4, 2018
Receivables, net of an allowance for doubtful accounts of $26 and $24, respectively	$	582	$	674
Short-term contract liabilities included in:
Unredeemed gift cards	285		316
Deferred revenue	371		408
Accrued liabilities	139		151
Long-term contract liabilities included in:
Long-term liabilities	20		22

We establish allowances for uncollectible receivables based on historical collection trends and write-off history. The following table summarizes our allowance for doubtful account activity related to contracts with customers during the three months ended May 5, 2018 ($ in millions):



	Allowance for Doubtful Accounts
Balances at February 4, 2018	$	24
Charged to expenses or other accounts	11
Other⁽¹⁾	(9		)
Balances at May 5, 2018	$	26


(1)	Includes bad debt write-offs and recoveries and the effect of foreign currency fluctuations.

The following table summarizes significant changes in our contract liability balances during the three months ended May 5, 2018 ($ in millions):



	Three Months Ended
	May 5, 2018
Revenue recognized that was included in the contract liability balance(s) as of February 4, 2018	$	455
Revenue recognized from performance obligations satisfied in previous periods	—
Adjustments⁽¹⁾	(2		)


(1)	Includes changes in the measure of progress, changes in the estimate of the transaction price or contract modifications.

The following table includes estimated revenue from our contract liability balances expected to be recognized in future periods if performance of the contract is expected to have a duration of more than one year ($ in millions):



	May 5, 2018⁽¹⁾
Remainder of fiscal 2019	$	20
Fiscal 2020	15
Fiscal 2021	6
Fiscal 2022	2
Fiscal 2023 and thereafter	1

(1)

We have elected to exclude unsatisfied performance obligations from contract liability balances with a duration of one year or less. The estimated transaction price disclosed above also does not include amounts of variable consideration attributable to contracts where the consideration is constrained at May 5, 2018. Further information about our forms of variable consideration are disclosed below.