Accounts Receivable

12 Months Ended

Dec. 31, 2016

Accounts Receivable, Net [Abstract]

Accounts Receivable

Accounts Receivable, net

Accounts receivable at December 31 consisted of the following:

	2016			2015
U.S. government contracts		$4,639			$4,864
Commercial Airplanes	2,432			2,250
Defense, Space & Security customers (1)	733			889
Reinsurance receivables	526			550
Other	567			254
Less valuation allowance	(65		)	(94		)
Total		$8,832			$8,713

⁽¹⁾  Excludes U.S. government contracts

The following table summarizes our accounts receivable under long-term contracts that were unbillable or related to outstanding claims as of December 31:

	Unbillable				Claims
	2016		2015		2016		2015
Current		$1,919		$2,024	$38
Expected to be collected after one year	2,011		2,001			$91	70
Total		$3,930		$4,025		$129		$70

Under contract accounting unbillable receivables on long-term contracts arise when the sales or revenues based on performance attainment, though appropriately recognized, cannot be billed yet under terms of the contract as of the balance sheet date. Any adjustment for the credit quality of unbillable receivables, if required, would be recorded as a direct reduction of revenue. Factors considered in assessing the collectability of unbillable receivables include, but are not limited to, a customer’s extended delinquency, requests for restructuring and filings for bankruptcy. Unbillable receivables related to commercial customers expected to be collected after one year were$172 and $178 at December 31, 2016 and 2015. Accounts receivable related to claims are items that we believe are earned, but are subject to uncertainty concerning their determination or ultimate realization.

Accounts receivable, other than those described above, expected to be collected after one year are not material.