Redeemable Noncontrolling Interests (Changes in Redeemable Noncontrolling Interests) (Details) - USD ($) $ in Millions	12 Months Ended			34 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period	$ 12
Net purchase of redeemable noncontrolling interests		$ (19)	$ (1)	$ (103)
Balance at end of period	0	12		12
naviHealth [Member]
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period	12	118	117
Net earnings attributable to redeemable noncontrolling interest		2	4
Net purchase of redeemable noncontrolling interests		(103)	(3)
Noncontrolling Interest, Change in Redemption Value		(5)
Balance at end of period	0	$ 12	$ 118	$ 12
naviHealth [Member]
Increase (Decrease) in Temporary Equity [Roll Forward]
Redeemable Non Controlling Interest Divested	$ (12)