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Note 17 - Segment Information - Summary of Reconciliation of Reportable Segment Revenues to Consolidated Revenues (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]        
Revenues $ 263 $ 267 $ 510 $ 516
All Other Revenues        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Revenues 4 4 8 8
Operating Segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Revenues $ 259 $ 263 $ 502 $ 508