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Schedule of cash and cash equivalents in the statement of cash flows (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Jun. 30, 2021
Cash And Cash Equivalents And Marketable Securities    
Cash and cash equivalents in statements of financial position $ 10,467 $ 11,711
Cash and cash equivalents classified as assets held for sale 13 14
Cash and cash equivalents according to Statements of Cash Flows (opening balance) 10,480 11,725
Cash and cash equivalents in statements of financial position 16,287 9,821
Cash and cash equivalents classified as assets held for sale 7 1
Cash and cash equivalents according to Statements of Cash Flows (closing balance) $ 16,294 $ 9,822