Unapproved Change Orders and Claims Against Clients and Estimated Recoveries of Claims Against Suppliers and Subcontractors (Tables)

12 Months Ended

Dec. 31, 2019

Contractors [Abstract]

Schedule of Unapproved Change Orders and Claims

The amounts of unapproved change orders and claims against clients and estimated recoveries of claims against suppliers and subcontractors included in determining the profit or loss on contracts are as follows:

Dollars in millions	2019			2018
Amounts included in project estimates-at-completion at January 1,	$	973		$	924
Increase, net of foreign currency effect	12			53
Approved change orders, net of foreign currency effect	(7		)	(4		)
Amounts included in project estimates-at-completion at December 31,	$	978		$	973
Amounts recognized over time based on progress at December 31,	$	974		$	945