v3.25.4
Employee Benefits, Net Periodic Benefit Cost and Other Comprehensive Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other changes in plan assets and benefit obligations recognized in other comprehensive income:      
Net actuarial loss (gain) $ 1 $ (99) $ 22
Amortization of net actuarial gain (loss) (102) (109) (109)
Total recognized in other comprehensive income (101) (208) (87)
Pension benefits qualified [Member]      
Components of net periodic benefit cost [Abstract]      
Service cost 34 29 25
Interest cost 390 387 403
Expected return on plan assets (492) (472) (503)
Amortization of net actuarial loss (gain) 133 138 139
Amortization of prior service credit 0 0 0
Settlement loss 0 0 0
Curtailment gain 0 (3) 0
Net periodic benefit cost 65 79 64
Other changes in plan assets and benefit obligations recognized in other comprehensive income:      
Net actuarial loss (gain) (17) (74) 41
Amortization of net actuarial gain (loss) (133) (138) (139)
Prior service cost 1 0 0
Amortization of prior service credit 0 0 0
Settlement loss 0 0 0
Total recognized in other comprehensive income (149) (212) (98)
Total recognized in net periodic benefit cost and other comprehensive income (84) (133) (34)
Pension benefits nonqualified [Member]      
Components of net periodic benefit cost [Abstract]      
Service cost 0 0 0
Interest cost 15 17 18
Expected return on plan assets 0 0 0
Amortization of net actuarial loss (gain) 2 5 5
Amortization of prior service credit 0 0 0
Settlement loss 1 0 0
Curtailment gain 0 0 0
Net periodic benefit cost 18 22 23
Other changes in plan assets and benefit obligations recognized in other comprehensive income:      
Net actuarial loss (gain) 18 (27) 8
Amortization of net actuarial gain (loss) (2) (5) (5)
Prior service cost 0 0 0
Amortization of prior service credit 0 0 0
Settlement loss (1) 0 0
Total recognized in other comprehensive income 15 (32) 3
Total recognized in net periodic benefit cost and other comprehensive income 33 (10) 26
Other benefits [Member]      
Components of net periodic benefit cost [Abstract]      
Service cost 0 0 0
Interest cost 13 13 15
Expected return on plan assets (28) (25) (25)
Amortization of net actuarial loss (gain) (25) (24) (25)
Amortization of prior service credit (9) (10) (10)
Settlement loss 0 0 0
Curtailment gain 0 0 0
Net periodic benefit cost (49) (46) (45)
Other changes in plan assets and benefit obligations recognized in other comprehensive income:      
Net actuarial loss (gain) (22) (2) (27)
Amortization of net actuarial gain (loss) 25 24 25
Prior service cost 21 4 0
Amortization of prior service credit 9 10 10
Settlement loss 0 0 0
Total recognized in other comprehensive income 33 36 8
Total recognized in net periodic benefit cost and other comprehensive income $ (16) $ (10) $ (37)