Derivative Instruments - Derivatives Recorded at Fair Value (Details) - USD ($) $ in Millions	Oct. 26, 2019	Jul. 27, 2019
Derivative [Line Items]
DERIVATIVE ASSETS	$ 103	$ 89
DERIVATIVE LIABILITIES	8	15
Derivatives designated as hedging instruments:
Derivative [Line Items]
DERIVATIVE ASSETS	98	80
DERIVATIVE LIABILITIES	5	9
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other current assets
Derivative [Line Items]
DERIVATIVE ASSETS	3	5
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other current liabilities
Derivative [Line Items]
DERIVATIVE LIABILITIES	5	8
Derivatives designated as hedging instruments: | Interest rate derivatives | Other current assets
Derivative [Line Items]
DERIVATIVE ASSETS	1	0
Derivatives designated as hedging instruments: | Interest rate derivatives | Other current liabilities
Derivative [Line Items]
DERIVATIVE LIABILITIES	0	1
Derivatives designated as hedging instruments: | Interest rate derivatives | Other assets
Derivative [Line Items]
DERIVATIVE ASSETS	94	75
Derivatives designated as hedging instruments: | Interest rate derivatives | Other long-term liabilities
Derivative [Line Items]
DERIVATIVE LIABILITIES	0	0
Derivatives not designated as hedging instruments:
Derivative [Line Items]
DERIVATIVE ASSETS	5	9
DERIVATIVE LIABILITIES	3	6
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other current assets
Derivative [Line Items]
DERIVATIVE ASSETS	5	9
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other current liabilities
Derivative [Line Items]
DERIVATIVE LIABILITIES	$ 3	$ 6