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Income Taxes (Schedule of Deferred Tax Assets and Liabilities After Netting by Tax Jurisdiction) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Jun. 30, 2019
Income Tax Disclosure [Abstract]    
Deferred Income Taxes and Other Assets, Noncurrent $ 39 $ 36
Deferred Income Taxes and Other Tax Liabilities, Noncurrent 1,258 1,749
Net deferred income tax liability $ (1,219) $ (1,713)