XML 91 R79.htm IDEA: XBRL DOCUMENT v3.19.1
Available-for-Sale Debt Investments and Equity Investments (Summary of Gains and Losses Recognized on Marketable and Non-marketable Equity Securities) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 27, 2019
Apr. 27, 2019
Adjustments to non-marketable equity securities measured using the measurement alternative:    
Upward adjustments $ 9 $ 33
Downward adjustments, including impairments (4) (22)
Net upward adjustments 5 11
Net gains and losses recognized during the period on equity investments 3 78
Less: Net gains and losses recognized on equity investments sold (44) (51)
Unrealized gains and losses recognized during reporting period on equity securities still held at the reporting date $ (41) $ 27