XML 87 R75.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value (Fair Value, Nonrecurring Measurement) (Details) - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 28, 2018
Apr. 29, 2017
Apr. 28, 2018
Apr. 29, 2017
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]        
Total gains (losses) for nonrecurring measurements $ (18) $ (51) $ (37) $ (228)
Disposal Group, Disposed of by Sale, Not Discontinued Operations        
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]        
Total gains (losses) for nonrecurring measurements (5) 0 (5) 0
Investments in privately held companies (impaired)        
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]        
Total gains (losses) for nonrecurring measurements (12) (51) (51) (162)
Purchased intangible assets (impaired)        
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]        
Total gains (losses) for nonrecurring measurements (1) 0 (1) (42)
Property held for sale—land and buildings        
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items]        
Total gains (losses) for nonrecurring measurements $ 0 $ 0 $ 20 $ (24)