Contract Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Contract Assets and Liabilities

The following summarizes information about our contract assets and liabilities:

(in millions)	March 31, 2020		December 31, 2019
Information about contract assets:
Contract assets
Unbilled receivables	$	840	$	851
Contract work in progress	471		387
Contract assets	$	1,311	$	1,238
Advance billings deducted from contract assets	$	515	$	574
	Three Months Ended March 31,
(in millions)	2020		2019
Information about contract liabilities:
Revenue recognized during the year that was included in contract liabilities as of January 1	$	543	$	581