Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of contract assets and liabilities

Total Contract assets and Contract liabilities at September 30, 2020 and December 31, 2019 are as follows:

(dollars in millions)	September 30, 2020		December 31, 2019
Contract assets, current	$	481	$	529
Total contract assets	481		529
Contract liabilities, current	2,503		2,270
Contract liabilities, noncurrent (included within Other long-term liabilities)	33		18
Total contract liabilities	2,536		2,288
Net contract liabilities	$	2,055	$	1,759