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STATEMENT OF CASH FLOWS (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash:    
Cash paid during the period for interest $ 63 $ 66
Cash paid during the period for income taxes 314 217
Non-cash investing and financing activities:    
Capital lease, capitalized interest and asset retirement obligations incurred   8
Property, plant and equipment accrued but unpaid $ 53 $ 35