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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, 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) |

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