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PENSION, DEFERRED COMPENSATION 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, 2025
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan Disclosure      
Fair value of plan assets $ 1,437 $ 1,368  
Level 1      
Defined Benefit Plan Disclosure      
Fair value of plan assets 470 440  
Level 2      
Defined Benefit Plan Disclosure      
Fair value of plan assets 702 670  
Level 3      
Defined Benefit Plan Disclosure      
Fair value of plan assets 18 14  
Assets Measured at Net Asset Value      
Defined Benefit Plan Disclosure      
Fair value of plan assets 247 244  
Cash and cash equivalents      
Defined Benefit Plan Disclosure      
Fair value of plan assets 2 2  
Cash and cash equivalents | Level 1      
Defined Benefit Plan Disclosure      
Fair value of plan assets 2 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      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Short-term investment funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets 11 31  
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 7 28  
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      
Defined Benefit Plan Disclosure      
Fair value of plan assets 4 3  
Government and agency securities      
Defined Benefit Plan Disclosure      
Fair value of plan assets 144 137  
Government and agency securities | Level 1      
Defined Benefit Plan Disclosure      
Fair value of plan assets 144 137  
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      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Commingled funds      
Defined Benefit Plan Disclosure      
Fair value of plan assets $ 1,178 1,091  
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 $ 324 301  
Commingled funds | Level 2      
Defined Benefit Plan Disclosure      
Fair value of plan assets 695 642  
Commingled funds | Level 3      
Defined Benefit Plan Disclosure      
Fair value of plan assets 0 0  
Commingled funds | Assets Measured at Net Asset Value      
Defined Benefit Plan Disclosure      
Fair value of plan assets 159 148  
Insurance contracts      
Defined Benefit Plan Disclosure      
Fair value of plan assets 18 14  
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 18 14 $ 8
Insurance contracts | Assets Measured at Net Asset Value      
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 $ 84 93  
Interests in limited partnerships and hedge fund investments | Minimum      
Defined Benefit Plan Disclosure      
Monthly and/or quarterly redemption notice period 30 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      
Defined Benefit Plan Disclosure      
Fair value of plan assets $ 84 $ 93