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Taxes on Earnings Taxes on Earnings (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 5 Months Ended 6 Months Ended 12 Months Ended
Jul. 30, 2018
Jan. 01, 2018
Jan. 28, 2018
Dec. 31, 2017
Jan. 28, 2018
Jul. 29, 2018
Effective Income Tax Rate Reconciliation, State Tax Settlement         $ 15  
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities         33  
Unrecognized Tax Benefits     $ 32   32  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate     21   $ 21  
Tax Cut and Jobs Act 2017 [Member]            
Federal Statutory Income Tax Rate, Percent   21.00%   35.00%    
TCJA of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit), Due to Adjustment of Deferred Tax Liability     (183)      
TCJA of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense     $ 59      
Scenario, Forecast [Member] | Tax Cut and Jobs Act 2017 [Member]            
Federal Statutory Income Tax Rate, Percent           27.00%
TCJA of 2017, Interest Expense Deductibility, Percent 30.00%