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Investment Components (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis $ 99,869  
Debt investments, Recorded Basis 95,332  
Derivative, net 267 $ 226
Cash and cash equivalents 34,704 13,931
Short-term Investments 76,558 90,826
Equity Investments 9,879 6,891
Cash, cash equivalents, and investments 121,141 111,648
Equity Securities    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 17,325 8,025
Cash and cash equivalents 7,446 1,134
Short-term Investments 0 0
Equity Investments 9,879 6,891
Equity Securities | Other    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 7,187 6,435
Cash and cash equivalents 0 0
Short-term Investments 0 0
Equity Investments 7,187 6,435
Equity Securities | Level 1    
Cash Cash Equivalents And Investments [Line Items]    
Equity investments, Recorded Basis 10,138 1,590
Cash and cash equivalents 7,446 1,134
Short-term Investments 0 0
Equity Investments 2,692 456
Cash    
Cash Cash Equivalents And Investments [Line Items]    
Cash 8,478 8,258
Cash and cash equivalents 8,478 8,258
Short-term Investments 0 0
Equity Investments 0 0
Derivatives, net    
Cash Cash Equivalents And Investments [Line Items]    
Derivative, net [1] 6 8
Cash and cash equivalents [1] 0 0
Short-term Investments [1] 6 8
Equity Investments [1] 0 0
Debt Securities    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 99,869 98,118
Debt investments, Unrealized Gains 13 53
Debt investments, Unrealized Losses (4,550) (2,814)
Debt investments, Recorded Basis 95,332 95,357
Cash and cash equivalents 18,780 4,539
Short-term Investments 76,552 90,818
Equity Investments 0 0
Debt Securities | Commercial Paper | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 16,589 2,500
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 16,589 2,500
Cash and cash equivalents 12,231 2,498
Short-term Investments 4,358 2
Equity Investments 0 0
Debt Securities | Certificates of deposit | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 2,701 2,071
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 2,701 2,071
Cash and cash equivalents 2,657 2,032
Short-term Investments 44 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 65,237 79,696
Debt investments, Unrealized Gains 2 29
Debt investments, Unrealized Losses (3,870) (2,178)
Debt investments, Recorded Basis 61,369 77,547
Cash and cash equivalents 2,991 9
Short-term Investments 58,378 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 2,703 419
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 (9)
Debt investments, Recorded Basis 2,703 410
Cash and cash equivalents 894 0
Short-term Investments 1,809 410
Equity Investments 0 0
Debt Securities | Foreign government bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 498 506
Debt investments, Unrealized Gains 1 0
Debt investments, Unrealized Losses (24) (24)
Debt investments, Recorded Basis 475 482
Cash and cash equivalents 0 0
Short-term Investments 475 482
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 824 727
Debt investments, Unrealized Gains 1 1
Debt investments, Unrealized Losses (39) (30)
Debt investments, Recorded Basis 786 698
Cash and cash equivalents 0 0
Short-term Investments 786 698
Equity Investments 0 0
Debt Securities | Corporate notes and bonds | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 10,809 11,661
Debt investments, Unrealized Gains 8 4
Debt investments, Unrealized Losses (583) (554)
Debt investments, Recorded Basis 10,234 11,111
Cash and cash equivalents 0 0
Short-term Investments 10,234 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 120 67
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses 0 0
Debt investments, Recorded Basis 120 67
Cash and cash equivalents 0 0
Short-term Investments 120 67
Equity Investments 0 0
Debt Securities | Municipal securities | Level 2    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 285 368
Debt investments, Unrealized Gains 1 19
Debt investments, Unrealized Losses (18) (13)
Debt investments, Recorded Basis 268 374
Cash and cash equivalents 7 0
Short-term Investments 261 374
Equity Investments 0 0
Debt Securities | Municipal securities | Level 3    
Cash Cash Equivalents And Investments [Line Items]    
Debt investments, Adjusted Cost Basis 103 103
Debt investments, Unrealized Gains 0 0
Debt investments, Unrealized Losses (16) (6)
Debt investments, Recorded Basis 87 97
Cash and cash equivalents 0 0
Short-term Investments 87 97
Equity Investments $ 0 $ 0
[1] Refer to Note 5 – Derivatives for further information on the fair value of our derivative instruments.