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Contract Assets and Liabilities
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Contract Assets and Liabilities Contract Assets and Liabilities
The following summarizes information about our contract assets and liabilities:
December 31,
(in millions)20242023
Information about contract assets:
Contract assets
Unbilled receivables - reimbursable contracts$1,050 $854 
Contract work in progress - lump sum contracts88 137 
Contract assets$1,138 $991 
Year Ended December 31,
20242023
Information about contract liabilities:
Revenue recognized that was included in contract liabilities as of January 1$511 $616 
We periodically evaluate our project forecasts and the amounts recognized with respect to our claims and unapproved change orders. We include estimated amounts for claims and unapproved change orders in project revenue to the extent it is probable we will realize those amounts. As of December 31, 2024 and 2023, we had recorded $773 million and $531 million, respectively, of revenue associated with claims and unapproved change orders for costs incurred to date. Additional costs, which will increase this balance over time, are expected to be incurred in future periods. We had up to $23 million and $24 million of back charges that may be disputed as of December 31, 2024 and 2023.
Remaining Unsatisfied Performance Obligations
We estimate that our RUPO will be satisfied over the following periods:
(in millions)December 31, 2024
Within 1 year$15,917 
1 to 2 years7,111 
Thereafter3,256 
Total RUPO$26,284