v3.25.2
Pension and Other Postretirement Benefits - Schedule of Projected Benefit Obligation, Changes in Fair Value of Plan Assets and Funded Status (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Change in the fair value of plan assets for the Company’s benefit plans:    
Grantor Trust assets $ 265 $ 266
Pension benefits    
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]    
Projected benefit obligation, beginning of the year 1,119 1,172
Service cost 23 27
Interest cost 57 61
Benefits paid (44) (43)
Settlements (37) (50)
Actuarial gains 37 (48)
Projected benefit obligation, end of the year 1,155 1,119
Change in the fair value of plan assets for the Company’s benefit plans:    
Fair value of plan assets, beginning of the year 891 853
Actual return on plan assets 54 45
Employer contributions 40 86
Benefits paid (44) (43)
Settlements (37) (50)
Fair value of plan assets, end of the year 904 891
Funded status (251) (228)
Grantor Trust assets 265 266
Postretirement benefits    
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]    
Projected benefit obligation, beginning of the year 45 47
Service cost 1 0
Interest cost 2 2
Benefits paid (3) (3)
Settlements 0 0
Actuarial gains (1) (1)
Projected benefit obligation, end of the year 44 45
Change in the fair value of plan assets for the Company’s benefit plans:    
Fair value of plan assets, beginning of the year 0 0
Actual return on plan assets 0 0
Employer contributions 3 3
Benefits paid (3) (3)
Settlements 0 0
Fair value of plan assets, end of the year 0 0
Funded status (44) (45)
Grantor Trust assets $ 0 $ 0