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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Income Tax Contingency [Line Items]        
Effective income tax rate 20.00% 15.00% 20.00% 14.00%
Employer discretionary contribution amount   $ 250    
Discrete tax benefit   $ 31   $ 44
Unrecognized tax benefits $ 97   $ 97  
Unrecognized tax benefits that would affect the effective income tax rate 87   87  
Tax-related interest and penalties accrual 22   22  
Other current liabilities        
Income Tax Contingency [Line Items]        
Unrecognized tax benefits 10   10  
Projected additions to unrecognized tax benefits $ 2   $ 2