v3.26.1
Retirement Benefits - Schedule of Defined Benefit Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Pension Plan | United States      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 25 $ 28 $ 29
Interest cost 167 184 190
Expected return on plan assets (232) (245) (258)
Amortization of prior service cost 3 3 1
Amortization of net actuarial loss (gain) 5 7 2
Settlements 0 3 0
Net periodic benefit cost (credit) (32) (20) (36)
Pension Plan | Non-U.S. Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 22 22 22
Interest cost 72 76 80
Expected return on plan assets (89) (87) (95)
Amortization of prior service cost 0 0 0
Amortization of net actuarial loss (gain) 6 7 6
Settlements 3 0 0
Net periodic benefit cost (credit) 14 18 13
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0 0 0
Interest cost 3 4 4
Expected return on plan assets 0 0 0
Amortization of prior service cost 0 0 0
Amortization of net actuarial loss (gain) (2) (2) (2)
Settlements 0 0 0
Net periodic benefit cost (credit) $ 1 $ 2 $ 2