Inventories

12 Months Ended

Dec. 31, 2019

Inventories at December 31 consisted of the following:



	2019		2018
Long-term contracts in progress		$1,187		$2,129
Commercial aircraft programs	66,016		52,753
Commercial spare parts, used aircraft, general stock materials and other	9,419		7,685
Total		$76,622		$62,567

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 $176 and $227 at December 31, 2019 and 2018. See indemnifications to ULA in Note 15.

Included in inventories are capitalized precontract costs of $711 at December 31, 2019, primarily related to the KC-46A Tanker and Commercial Crew, and $644 at December 31, 2018 primarily related to KC-46A Tanker. See Note 14.

Commercial Aircraft Programs

At December 31, 2019 and 2018, commercial aircraft programs inventory included the following amounts related to the 737 program: $1,313 and $463 of deferred production costs and $521 and $471 of unamortized tooling and other non-recurring costs. At December 31, 2019, $1,829 of 737 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 $5 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

At December 31, 2019 and 2018, commercial aircraft programs inventory included the following amounts related to the 777X program: $5,628 and $3,067 of work in process and $2,914 and $2,512 of unamortized tooling and other non-recurring costs.

At December 31, 2019 and 2018, commercial aircraft programs inventory included the following amounts related to the 787 program: $24,772 and $27,852 of work in process (including deferred production costs of $18,716 and $22,967), $2,202 and $2,453 of supplier advances, and $2,092 and $2,638 of unamortized tooling and other non-recurring costs. At December 31, 2019, $14,386 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 $6,422 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

Commercial aircraft programs inventory included amounts credited in cash or other consideration (early issue sales consideration) to airline customers totaling $2,863 and $2,844 at December 31, 2019 and 2018.