v3.26.1
Note 12 - Employee Benefit Plans - Components of Net Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Amortization of actuarial loss   $ 7
Pension Plan [Member]    
Service cost $ 6 6
Interest cost 23 22
Expected return on assets (33) (31)
Amortization of prior service benefit (1) (1)
Amortization of actuarial loss 7 7
Settlement gain 0 (1)
Net periodic benefit cost 2 2
Other Postretirement Benefits Plan [Member]    
Service cost 0 0
Interest cost 1 1
Expected return on assets 0 0
Amortization of prior service benefit (1) (1)
Amortization of actuarial loss 0 0
Settlement gain 0 0
Net periodic benefit cost $ 0 $ 0