v3.22.2.2
Business Segments
 9 Months Ended
Sep. 30, 2022
Segment Reporting [Abstract]  
Business Segments
Note 10–Business Segments
Our operations and reportable segments are organized around the customers and markets we serve. We define our reportable segments based on the way the chief operating decision maker ("CODM"), currently our Chairman and Chief Executive Officer, manages operations for the purposes of allocating resources and assessing performance.
During fiscal 2021, certain contracts were reassigned from the Defense Solutions reportable segment to the Civil reportable segment. Impact on prior year segment results were determined to be immaterial and have not been recast to reflect this change.
The segment information for the periods presented was as follows:
Three Months EndedNine Months Ended
September 30,
2022		October 1,
2021		September 30,
2022		October 1,
2021
(in millions)
Revenues:
Defense Solutions$2,075 $2,009 $6,176 $5,971 
Civil874 792 2,526 2,357 
Health659 682 1,997 1,918 
Total revenues$3,608 $3,483 $10,699 $10,246 
Operating income (loss):
Defense Solutions$137 $140 $409 $429 
Civil79 58 160 187 
Health91 130 335 339 
Corporate(26)(23)(81)(73)
Total operating income $281 $305 $823 $882 
The income statement performance measures used to evaluate segment performance are revenues and operating income. As a result, "Interest expense, net," "Other (expense) income, net" and "Income tax expense" as reported in the condensed consolidated statements of income are not allocated to our segments. Under U.S. Government Cost Accounting Standards, indirect costs including depreciation expense are collected in indirect cost pools, which are then collectively allocated to the reportable segments based on a representative causal or beneficial relationship of the costs in the pool to the costs in the base. As such, depreciation expense is not separately disclosed on the condensed consolidated statements of income.
Asset information by segment is not a key measure of performance used by the CODM.