Income Taxes (Schedule of Components of Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Provision, Continuing Operations [Abstract]
Federal	$ 181	$ 110	$ 127
State, local and other	2	9	68
Total current	183	119	195
Deferred	534	283	386
Provision for income taxes	$ 717	$ 402	$ 581