Contract Assets and Contract Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability

The table below presents the components of net contract assets.

	December 31, 2018			January 1, 2018
	(in millions)
Contract assets	$	1,590		$	1,349
Contract liabilities — current	(669		)	(565		)
Contract liabilities — non-current	(31		)	(28		)
Net contract assets	$	890		$	756

Components of Contract Assets

The components of contract assets are presented in the table below.

	December 31, 2018			January 1, 2018
	(in millions)
Unbilled contract receivables, gross	$	2,716		$	2,232
Unliquidated progress payments and advances	(1,126		)	(883		)
Total contract assets	$	1,590		$	1,349