Unbilled Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2020

Unbilled Receivables, Net [Abstract]

Unbilled receivables

Unbilled receivables, net consisted of the following:

	December 31
$ in millions	2020		2019
Due from U.S. government (1)
Unbilled receivables	$	19,315	$	17,347
Progress and performance-based payments received	(14,615)		(12,838)
Total due from U.S. government	4,700		4,509
Due from international and other customers
Unbilled receivables	3,361		4,063
Progress and performance-based payments received	(2,881)		(3,193)
Total due from international and other customers	480		870
Unbilled receivables, net of progress and performance-based payments received	5,180		5,379
Allowance for expected credit losses	(40)		(45)
Unbilled receivables, net	$	5,140	$	5,334

(1)Includes unbilled receivables due from the U.S. government associated with FMS sales. For FMS, we contract with and are paid by the U.S. government.