DEBT (Long-term Debt, Net of Unamortized Discounts or Premiums) (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	May 31, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Debt Instrument [Line Items]
Long-term debt	$ 2,784,000,000	$ 2,780,000,000
Less: Current maturities of long-term debt	300,000,000	0
Long-term debt, noncurrent	$ 2,484,000,000	2,780,000,000		$ 2,287,000,000	$ 2,284,000,000	$ 1,391,000,000
Senior Long-Term Notes and Debentures; 3.80%, $300 Due November 2021
Debt Instrument [Line Items]
Annual fixed interest rate	3.80%
Face value	$ 300,000,000
Long-term debt	$ 300,000,000	299,000,000
Senior Long-Term Notes and Debentures; 3.05%, $600 Due September 2022
Debt Instrument [Line Items]
Annual fixed interest rate	3.05%
Face value	$ 600,000,000
Long-term debt	$ 599,000,000	599,000,000
Senior Long-Term Notes and Debentures; 3.50%, $500 Due December 2024
Debt Instrument [Line Items]
Annual fixed interest rate	3.50%
Face value	$ 500,000,000
Long-term debt	$ 498,000,000	498,000,000
Senior Long-Term Notes And Debentures; 3.10%, $400 Due October 2027
Debt Instrument [Line Items]
Annual fixed interest rate	3.10%
Face value	$ 400,000,000
Long-term debt	$ 398,000,000	397,000,000
Senior Long-Term Notes And Debentures; 3.90%, $500 Due May 2028
Debt Instrument [Line Items]
Annual fixed interest rate	3.90%
Face value	$ 500,000,000
Long-term debt	$ 497,000,000	496,000,000
Senior Long-Term Notes And Debentures; 1.80%, $500 Due May 2030
Debt Instrument [Line Items]
Annual fixed interest rate	1.80%		1.80%
Face value	$ 500,000,000		$ 500,000,000
Long-term debt	$ 492,000,000	$ 491,000,000