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EMPLOYEE BENEFIT PLANS (Retirement Income Plan's Assets Carried at Fair Value) (Details) - Retirement Income - Retirement Income - USD ($)
$ in Millions
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value $ 412 $ 506 $ 507
Bond funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 391 459  
International equity funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 14 28  
Domestic equity funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0 14  
Short-term investment fund | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 4 3  
Real estate fund | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value $ 3 $ 2