v3.26.1
POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - Components Of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits      
AMOUNTS RECOGNIZED IN NET PERIODIC BENEFIT COST/(CREDIT)      
Service cost $ 182 $ 173 $ 164
Interest cost 499 498 527
Expected return on plan assets (681) (657) (610)
Amortization of net actuarial loss/(gain) 71 63 95
Amortization of prior service cost/(credit) 39 40 37
Amortization of net actuarial loss/(gain) due to settlements (6) 5 (13)
Special termination benefits 11 3 4
NET PERIODIC BENEFIT COST/(CREDIT) 114 126 203
CHANGE IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN AOCI      
Net actuarial loss/(gain) - current year (1,044) 68  
Prior service cost/(credit) - current year 18 12  
Amortization of net actuarial (loss)/gain (71) (63)  
Amortization of prior service (cost)/credit (39) (40)  
Amortization of net actuarial (loss)/gain due to settlements 6 (5)  
Currency translation and other (20) 74  
TOTAL CHANGE IN AOCI (1,149) 46  
NET AMOUNTS RECOGNIZED IN PERIODIC BENEFIT COST/(CREDIT) AND AOCI (1,035) 171  
Other Retiree Benefits      
AMOUNTS RECOGNIZED IN NET PERIODIC BENEFIT COST/(CREDIT)      
Service cost 80 61 68
Interest cost 181 147 157
Expected return on plan assets (787) (745) (687)
Amortization of net actuarial loss/(gain) (4) (59) (38)
Amortization of prior service cost/(credit) (90) (128) (127)
Amortization of net actuarial loss/(gain) due to settlements 0 0 0
Special termination benefits 13 2 3
NET PERIODIC BENEFIT COST/(CREDIT) (607) (721) $ (623)
CHANGE IN PLAN ASSETS AND BENEFIT OBLIGATIONS RECOGNIZED IN AOCI      
Net actuarial loss/(gain) - current year 1,571 1,592  
Prior service cost/(credit) - current year 0 (4)  
Amortization of net actuarial (loss)/gain 4 59  
Amortization of prior service (cost)/credit 90 128  
Amortization of net actuarial (loss)/gain due to settlements 0 0  
Currency translation and other 7 (14)  
TOTAL CHANGE IN AOCI 1,672 1,761  
NET AMOUNTS RECOGNIZED IN PERIODIC BENEFIT COST/(CREDIT) AND AOCI $ 1,065 $ 1,040