Contract Asset & Liability (Tables)

12 Months Ended

Dec. 31, 2019

Contract with Customer, Asset and Liability [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

Total contract assets and contract liabilities as of December 31, 2019 and 2018 are as follows:

(dollars in millions)	December 31, 2019		December 31, 2018
Total contract assets	$	4,462	$	3,666
Total contract liabilities	(9,014)		(7,818)
Net contract liabilities	$	(4,552)	$	(4,152)