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Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Income Tax Contingency [Line Items]      
Current Federal Tax Expense (Benefit) $ 34 $ (989) $ 659
Current State and Local Tax Expense (Benefit) 29 92 154
Current Foreign Tax Expense (Benefit) 93 112 69
Current Income Tax Expense (Benefit) 156 (785) 882
Deferred Federal Income Tax Expense (Benefit) 30 539 (822)
Deferred State and Local Income Tax Expense (Benefit) (22) (28) (127)
Deferred Foreign Income Tax Expense (Benefit) (1) (15) (12)
Deferred Income Tax Expense (Benefit) 7 496 (961)
Income Tax Expense (Benefit) 163 (289) (79)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at beginning of fiscal year 932 998 456
Additions for tax positions of the current year 7 121 500
Additions for tax positions of prior years 39 223 78
Reductions for tax positions of prior years (19) (138) (27)
Settlements with tax authorities (12) (271) (6)
Expiration of the statute of limitations (4) (1) (3)
Balance at end of fiscal year $ 943 $ 932 $ 998