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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Schedule of Revenues, Expenses, and Operating Earnings by Segment and Reconciliation to Earnings before Taxes
Revenues, expenses, and operating earnings by segment and the reconciliation to earnings before taxes for the periods ended March 31, 2025 and 2024 consists of the following:
Three Months Ended March 31,
(Dollars in millions)20252024
Revenues
ASC$511 $433 
IMS291 261 
Corporate & Eliminations(3)(6)
Total revenues$799 $688 
Cost of revenues
ASC$392 $329 
IMS229 212 
Corporate & Eliminations(3)(6)
Total cost of revenues$618 $535 
General and administrative
ASC$66 $60 
IMS23 20 
Corporate & Eliminations— 1 
Total general and administrative$89 $81 
Company-funded research and development
ASC$23 $16 
IMS5 4 
Corporate & Eliminations— — 
Total company-funded research and development$28 $20 
Amortization of intangibles
ASC$5 $5 
IMS— — 
Corporate & Eliminations— — 
Total amortization of intangibles$5 $5 
Other segment items
ASC$— $4 
IMS— — 
Corporate & Eliminations— — 
Total other segment items(1)
$— $4 
Operating earnings
ASC$25 $19 
IMS34 25 
Corporate & Eliminations— (1)
Total operating earnings$59 $43 
Interest expense(1)(5)
Other, net— (1)
Earnings before taxes$58 $37 
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(1)Includes ASC restructuring costs for the three months ended March 31, 2024.
Total intersegment revenues by segment for the periods ended March 31, 2025 and 2024 consists of the following:
Three Months Ended March 31,
(Dollars in millions)20252024
ASC$3 $6 
IMS— — 
Total intersegment revenues $3 $6 
Schedule of Depreciation, Assets by Segment
Depreciation by segment for the periods ended March 31, 2025 and 2024 consists of the following:
Three Months Ended March 31,
(Dollars in millions)20252024
ASC$12 $12 
IMS6 5 
Total depreciation $18 $17 
Total assets by segment as of March 31, 2025 and December 31, 2024, consists of the following:
(Dollars in millions)March 31, 2025December 31, 2024
ASC$2,389 $2,249 
IMS1,248 1,225 
Corporate & Eliminations459 710 
Total assets $4,096 $4,184