v3.26.3
RETIREMENT PLANS (Tables)
4 Months Ended
Sep. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost
Net periodic benefit cost of the pension and postretirement healthcare plans for the periods ended September 30, 2026 and 2025 included the following components (in millions):
Three Months Ended

Pension
Plans

Postretirement Healthcare Plans

2026

2025

20262025
Service cost
$107 

$108 

$7 

$7 
Interest cost
384 

370 

16 

17 
Expected return on plan assets
(484)

(436)

— 

— 
Amortization of prior service cost (credit)
10 

(2)

(1)

(1)
Actuarial losses (gains) and other
— — — — 
Net periodic benefit (income) cost
$17 

$40 

$22 

$23 

Four Months Ended

Pension
Plans

Postretirement Healthcare Plans

2026

2025

2026

2025
Service cost$146 

$146 

$9 

$9 
Interest cost518 

490 

21 

22 
Expected return on plan assets(637)

(582)

— 

— 
Amortization of prior service cost (credit)9 

(3)

(1)

(1)
Actuarial losses (gains) and other
(141)— — — 
Net periodic benefit (income) cost$(105)

$51 

$29 

$30