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Investment Components (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Jun. 30, 2022
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis $ 104,013  
Debt investments, Recorded Basis 98,860  
Derivative, net 286 $ 226
Cash and cash equivalents 22,884 13,931
Short-term Investments 84,378 90,826
Equity Investments 6,839 6,891
Cash, cash equivalents, and investments 114,101 111,648
Equity investments    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 7,986 8,025
Cash and cash equivalents 1,147 1,134
Short-term Investments 0 0
Equity Investments 6,839 6,891
Equity investments | Other    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 6,370 6,435
Cash and cash equivalents 0 0
Short-term Investments 0 0
Equity Investments 6,370 6,435
Equity investments | Level 1    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 1,616 1,590
Cash and cash equivalents 1,147 1,134
Short-term Investments 0 0
Equity Investments 469 456
Cash    
Cash Cash Equivalents And Investments [Line Items]    
Cash 7,237 8,258
Cash and cash equivalents 7,237 8,258
Short-term Investments 0 0
Equity Investments 0 0
Derivatives, net    
Cash Cash Equivalents And Investments [Line Items]    
Derivative, net [1] 18 8
Cash and cash equivalents [1] 0 0
Short-term Investments [1] 18 8
Equity Investments [1] 0 0
Debt Securities    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 104,013 98,118
Debt investments, Unrealized Gains 23 53
Debt investments, Unrealized Losses (5,176) (2,814)
Debt investments, Recorded Basis 98,860 95,357
Cash and cash equivalents 14,500 4,539
Short-term Investments 84,360 90,818
Equity Investments 0 0
Debt Securities | Commercial Paper | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 6,286 2,500
Debt investments, Unrealized Gains 2 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 6,288 2,500
Cash and cash equivalents 5,662 2,498
Short-term Investments 626 2
Equity Investments 0 0
Debt Securities | Certificates of deposit | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 2,570 2,071
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 2,570 2,071
Cash and cash equivalents 2,531 2,032
Short-term Investments 39 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 76,079 79,696
Debt investments, Unrealized Gains 7 29
Debt investments, Unrealized Losses (4,232) (2,178)
Debt investments, Recorded Basis 71,854 77,547
Cash and cash equivalents 1,955 9
Short-term Investments 69,899 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 5,815 419
Debt investments, Unrealized Gains 5 0
Debt investments, Unrealized Losses (9) (9)
Debt investments, Recorded Basis 5,811 410
Cash and cash equivalents 4,352 0
Short-term Investments 1,459 410
Equity Investments 0 0
Debt Securities | Foreign government bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 493 506
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses (36) (24)
Debt investments, Recorded Basis 457 482
Cash and cash equivalents 0 0
Short-term Investments 457 482
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 845 727
Debt investments, Unrealized Gains 0 1
Debt investments, Unrealized Losses (45) (30)
Debt investments, Recorded Basis 800 698
Cash and cash equivalents 0 0
Short-term Investments 800 698
Equity Investments 0 0
Debt Securities | Corporate notes and bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 11,373 11,661
Debt investments, Unrealized Gains 1 4
Debt investments, Unrealized Losses (825) (554)
Debt investments, Recorded Basis 10,549 11,111
Cash and cash equivalents 0 0
Short-term Investments 10,549 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 76 67
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 76 67
Cash and cash equivalents 0 0
Short-term Investments 76 67
Equity Investments 0 0
Debt Securities | Municipal securities | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 372 368
Debt investments, Unrealized Gains 8 19
Debt investments, Unrealized Losses (22) (13)
Debt investments, Recorded Basis 358 374
Cash and cash equivalents 0 0
Short-term Investments 358 374
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.