XML 58 R42.htm IDEA: XBRL DOCUMENT v3.23.1
Fair Value Measurements and Investments - Schedule of Non-Marketable Equity Securities (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Fair Value Disclosures [Abstract]        
Initial cost basis $ 754   $ 754  
Upward adjustments 829   829  
Downward adjustments (including impairment) (438)   (438)  
Carrying amount, end of period 1,145   1,145  
Upward adjustments 2 $ 2 19 $ 226
Downward adjustments (including impairment) $ (89) $ (53) $ (89) $ (53)