Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of fiscal year	$ 417	$ 527	$ 542
Additions for tax positions of the current year	15	29	22
Additions for tax positions of prior years (1)	141	23	42
Reductions for tax positions of prior years	(40)	(8)	(48)
Settlements with tax authorities (1)	(99)	(154)	(30)
Expiration of the statute of limitations (1)	(11)	0	(1)
Balance at end of fiscal year	423	$ 417	$ 527
Patient Recovery Business [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Additions for tax positions of prior years (1)	110
Settlements with tax authorities (1)	(81)
Expiration of the statute of limitations (1)	$ (11)