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Contract Assets and Liabilities
 6 Months Ended
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]  
Contract Assets and Liabilities Contract Assets and Liabilities
The following summarizes information about our contract assets and liabilities:
(in millions)June 30, 2022December 31, 2021
Information about contract assets:
Contract assets
Unbilled receivables - reimbursable contracts$817 $822 
Contract work in progress - lump-sum contracts230 244 
Contract assets$1,047 $1,066 
Advance billings deducted from contract assets$228 $208 
6ME
June 30,
(in millions)20222021
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1$741 $840 
Remaining Unsatisfied Performance Obligations
We estimate that our RUPO will be satisfied over the following periods:
(in millions)June 30, 2022
Within 1 year$10,028 
1 to 2 years5,368 
Thereafter2,512 
Total RUPO$17,908