PENSION AND POST-RETIREMENT BENEFIT PLANS - Fair Values of the Company's Pension and Post-Retirement Plan Assets by Asset Category (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 1,554	$ 1,437
Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	647	470
Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	656	702
Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	20	18
Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	231	247
Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	1	2
Cash and cash equivalents \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	1	2
Cash and cash equivalents \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Cash and cash equivalents \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Cash and cash equivalents \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Short-term investment funds
Defined Benefit Plan Disclosure
Fair value of plan assets	28	11
Short-term investment funds \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Short-term investment funds \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	24	7
Short-term investment funds \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Short-term investment funds \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	4	4
Government and agency securities
Defined Benefit Plan Disclosure
Fair value of plan assets	296	144
Government and agency securities \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	296	144
Government and agency securities \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Government and agency securities \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Government and agency securities \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Commingled funds
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 1,129	1,178
Commingled funds \| Minimum
Defined Benefit Plan Disclosure
Monthly and/or quarterly redemption notice period	10 days
Commingled funds \| Maximum
Defined Benefit Plan Disclosure
Monthly and/or quarterly redemption notice period	14 days
Commingled funds \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 350	324
Commingled funds \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	632	695
Commingled funds \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Commingled funds \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	147	159
Insurance contracts
Defined Benefit Plan Disclosure
Fair value of plan assets	20	18
Insurance contracts \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Insurance contracts \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Insurance contracts \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	20	18	$ 14
Insurance contracts \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Interests in limited partnerships and hedge fund investments
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 80	84
Interests in limited partnerships and hedge fund investments \| Minimum
Defined Benefit Plan Disclosure
Monthly and/or quarterly redemption notice period	45 days
Interests in limited partnerships and hedge fund investments \| Maximum
Defined Benefit Plan Disclosure
Monthly and/or quarterly redemption notice period	90 days
Interests in limited partnerships and hedge fund investments \| Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	0
Interests in limited partnerships and hedge fund investments \| Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Interests in limited partnerships and hedge fund investments \| Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Interests in limited partnerships and hedge fund investments \| Assets Measured at Net Asset Value as a Practical Expedient
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 80	$ 84