Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Tax Contingency [Line Items]
Current Federal Tax Expense (Benefit)		$ 295	$ 341	$ 273
Current State and Local Tax Expense (Benefit)		89	41	10
Current Foreign Tax Expense (Benefit)		85	143	56
Current Income Tax Expense (Benefit)		469	525	339
Deferred Federal Income Tax Expense (Benefit)		(28)	(1,003)	258
Deferred State and Local Income Tax Expense (Benefit)		(37)	16	37
Deferred Foreign Income Tax Expense (Benefit)		(18)	(25)	(4)
Deferred Income Tax Expense (Benefit)		(83)	(1,012)	291
Income Tax Expense (Benefit)		386	(487)	630
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of fiscal year		423	417	527
Additions for tax positions of the current year	$ 15	24		29
Additions for tax positions of prior years (1)	141	39		23
Reductions for tax positions of prior years	(40)	(5)		(8)
Settlements with tax authorities (1)	(99)	(25)		(154)
Expiration of the statute of limitations (1)	(11)	0		0
Balance at end of fiscal year	$ 423	$ 456	423	$ 417
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)