Contracts with Customers Contracts with Customers

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Long-term Contracts or Programs Disclosure

Contracts with Customers

Unbilled receivables increased from $7,995 at December 31, 2020 to $9,203 at June 30, 2021, primarily driven by revenue recognized at Defense, Space & Security (BDS) and Global Services (BGS) in excess of billings.

Advances and progress billings increased from $50,488 at December 31, 2020 to $50,738 at June 30, 2021, primarily driven by advances on orders received at Commercial Airplanes (BCA), BDS, and BGS, partially offset by revenue recognized and the return of customer advances at BCA.

Revenues recognized during the six months ended June 30, 2021 and 2020 from amounts recorded as Advances and progress billings at the beginning of each year were $7,315 and $5,255. Revenues recognized during the three months ended June 30, 2021 and 2020 from amounts recorded as Advances and progress billings at the beginning of each year were $2,597 and $1,465.