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Investment Components (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Jun. 30, 2022
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis $ 95,829  
Debt investments, Recorded Basis 91,109  
Derivative, net 46 $ 226
Cash and cash equivalents 15,646 13,931
Short-term Investments 83,862 90,826
Equity Investments 7,097 6,891
Cash, cash equivalents, and investments 106,605 111,648
Equity investments    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 8,179 8,025
Cash and cash equivalents 1,082 1,134
Short-term Investments 0 0
Equity Investments 7,097 6,891
Equity investments | Other    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 6,658 6,435
Cash and cash equivalents 0 0
Short-term Investments 0 0
Equity Investments 6,658 6,435
Equity investments | Level 1    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 1,521 1,590
Cash and cash equivalents 1,082 1,134
Short-term Investments 0 0
Equity Investments 439 456
Cash    
Cash Cash Equivalents And Investments [Line Items]    
Cash 7,304 8,258
Cash and cash equivalents 7,304 8,258
Short-term Investments 0 0
Equity Investments 0 0
Derivatives, net    
Cash Cash Equivalents And Investments [Line Items]    
Derivative, net [1] 13 8
Cash and cash equivalents [1] 0 0
Short-term Investments [1] 13 8
Equity Investments [1] 0 0
Debt Securities    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 95,829 98,118
Debt investments, Unrealized Gains 19 53
Debt investments, Unrealized Losses (4,739) (2,814)
Debt investments, Recorded Basis 91,109 95,357
Cash and cash equivalents 7,260 4,539
Short-term Investments 83,849 90,818
Equity Investments 0 0
Debt Securities | Commercial Paper | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 6,423 2,500
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 6,423 2,500
Cash and cash equivalents 3,307 2,498
Short-term Investments 3,116 2
Equity Investments 0 0
Debt Securities | Certificates of deposit | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 2,694 2,071
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 2,694 2,071
Cash and cash equivalents 2,250 2,032
Short-term Investments 444 39
Equity Investments 0 0
Debt Securities | U.S. government securities | Level 1    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 67,941 79,696
Debt investments, Unrealized Gains 0 29
Debt investments, Unrealized Losses (3,963) (2,178)
Debt investments, Recorded Basis 63,978 77,547
Cash and cash equivalents 1,029 9
Short-term Investments 62,949 77,538
Equity Investments 0 0
Debt Securities | U.S. agency securities | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 5,525 419
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses (6) (9)
Debt investments, Recorded Basis 5,519 410
Cash and cash equivalents 674 0
Short-term Investments 4,845 410
Equity Investments 0 0
Debt Securities | Foreign government bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 491 506
Debt investments, Unrealized Gains 1 0
Debt investments, Unrealized Losses (27) (24)
Debt investments, Recorded Basis 465 482
Cash and cash equivalents 0 0
Short-term Investments 465 482
Equity Investments 0 0
Debt Securities | Mortgage- and asset-backed securities | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 883 727
Debt investments, Unrealized Gains 1 1
Debt investments, Unrealized Losses (43) (30)
Debt investments, Recorded Basis 841 698
Cash and cash equivalents 0 0
Short-term Investments 841 698
Equity Investments 0 0
Debt Securities | Corporate notes and bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 11,310 11,661
Debt investments, Unrealized Gains 8 4
Debt investments, Unrealized Losses (676) (554)
Debt investments, Recorded Basis 10,642 11,111
Cash and cash equivalents 0 0
Short-term Investments 10,642 11,111
Equity Investments 0 0
Debt Securities | Corporate notes and bonds | Level 3    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 88 67
Debt investments, Unrealized Gains 1 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 89 67
Cash and cash equivalents 0 0
Short-term Investments 89 67
Equity Investments 0 0
Debt Securities | Municipal securities | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 370 368
Debt investments, Unrealized Gains 8 19
Debt investments, Unrealized Losses (17) (13)
Debt investments, Recorded Basis 361 374
Cash and cash equivalents 0 0
Short-term Investments 361 374
Equity Investments 0 0
Debt Securities | Municipal securities | Level 3    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 104 103
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses (7) (6)
Debt investments, Recorded Basis 97 97
Cash and cash equivalents 0 0
Short-term Investments 97 97
Equity Investments $ 0 $ 0
[1] Refer to Note 5 – Derivatives for further information on the fair value of our derivative instruments.