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Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Income Tax Contingency [Line Items] |  |  |  |
Current Federal Tax Expense (Benefit) |  | $ 659 | $ 295 | $ 341
Current State and Local Tax Expense (Benefit) |  | 154 | 89 | 41
Current Foreign Tax Expense (Benefit) |  | 69 | 85 | 143
Current Income Tax Expense (Benefit) |  | 882 | 469 | 525
Deferred Federal Income Tax Expense (Benefit) |  | (822) | (28) | (1,003)
Deferred State and Local Income Tax Expense (Benefit) |  | (127) | (37) | 16
Deferred Foreign Income Tax Expense (Benefit) |  | (12) | (18) | (25)
Deferred Income Tax Expense (Benefit) |  | (961) | (83) | (1,012)
Income Tax Expense (Benefit) |  | (79) | 386 | (487)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |
Balance at beginning of fiscal year |  | 456 | 423 | 417
Additions for tax positions of the current year | $ 24 | 500 |  | 15
Additions for tax positions of prior years (1) | 39 | 78 |  | 141
Reductions for tax positions of prior years | (5) | (27) |  | (40)
Settlements with tax authorities (1) | (25) | (6) |  | (99)
Expiration of the statute of limitations (1) | 0 | (3) |  | (11)
Balance at end of fiscal year | $ 423 | $ 998 | $ 456 | 423
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)

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