Inventories

12 Months Ended

Dec. 31, 2018

Inventories at December 31 consisted of the following:



	2018		2017
Long-term contracts in progress		$2,129		$1,854
Commercial aircraft programs	52,753		52,861
Commercial spare parts, used aircraft, general stock materials and other	7,685		6,673
Total		$62,567		$61,388

Long-Term Contracts in Progress

Long-term contracts in progress includes Delta launch program inventory that is being sold at cost to United Launch Alliance (ULA) under an inventory supply agreement that terminates on March 31, 2021. The inventory balance was $227 and $284 at December 31, 2018 and 2017. See indemnifications to ULA in Note 15.

Included in inventories are capitalized precontract costs of $644 at December 31, 2018 primarily related to the KC-46A Tanker and $933 at December 31, 2017 primarily related to KC-46A Tanker, C-17 and F/A-18. See Note 14.

Commercial Aircraft Programs

At December 31, 2018 and 2017, commercial aircraft programs inventory included the following amounts related to the 787 program: $27,852 and $30,695 of work in process (including deferred production costs of $22,967 and $25,358), $2,453 and $3,189 of supplier advances, and $2,638 and $3,173 of unamortized tooling and other non-recurring costs. At December 31, 2018, $17,320 of 787 deferred production costs, unamortized tooling and other non-recurring costs are expected to be recovered from units included in the program accounting quantity that have firm orders and $8,285 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

At December 31, 2018 and 2017, commercial aircraft programs inventory included $116 and $151 of unamortized tooling costs related to the 747 program. At December 31, 2018, $111 of 747 unamortized tooling costs are expected to be recovered from units included in the program accounting quantity that have firm orders or commitments. The program accounting quantity includes one already completed aircraft which is being remarketed.

Commercial aircraft programs inventory included amounts credited in cash or other consideration (early issue sales consideration) to airline customers totaling $2,844 and $2,976 at December 31, 2018 and 2017.