Contract Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability

The following summarizes information about our contract assets and liabilities:

(in millions)	September 30, 2021		December 31, 2020
Information about contract assets:
Contract assets
Unbilled receivables - reimbursable contracts	$	724	$	590
Contract work in progress - lump-sum contracts	288		270
Contract assets	$	1,012	$	860
Advance billings deducted from contract assets	$	234	$	308
	9ME September 30,
(in millions)	2021		2020
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1	$	836	$	674