Annual report pursuant to Section 13 and 15(d)

Common Stock and Stock-Based Incentive Compensation Plans (Details) (Narrative)

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Common Stock and Stock-Based Incentive Compensation Plans (Details) (Narrative) - USD ($)
6 Months Ended 12 Months Ended
Dec. 28, 2019
Jun. 29, 2019
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Expiration period     10 years    
Shares available for grant (shares) 61,000,000   61,000,000    
Excess tax benefits from stock-based compensation     $ 0 $ 0 $ 0
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Purchase price of common stock     100.00%    
Stock options, shares granted, weighted average estimated grant date fair value per share (USD per share)     $ 13.31 $ 7.62 $ 5.46
Expected dividends     0.00% 0.00% 0.00%
Stock options, shares exercised, total intrinsic value     $ 84,000,000 $ 67,000,000 $ 27,000,000
Unrecognized compensation expense related to stock options $ 12,000,000   $ 12,000,000    
Weighted-average remaining contractual life (in years)     1 year 10 months 13 days    
Time Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units, shares purchased, weighted average price per share (USD per share) $ 0.00   $ 0.00    
Unrecognized compensation expense related to stock options $ 322,000,000   $ 322,000,000    
Weighted-average remaining contractual life (in years)     1 year 9 months 18 days    
Granted (USD per share)     $ 32.52 $ 17.66 $ 12.65
Restricted stock units, shares vested, total fair value     $ 395,000,000 $ 315,000,000 $ 294,000,000
Weighted-average grant date fair value (usd per share) $ 22.93   $ 22.93 $ 12.86  
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected dividends     0.00% 0.00% 0.00%
Weighted-average remaining contractual life (in years)     2 years 6 months 21 days    
Granted (USD per share)     $ 50.00 $ 21.67 $ 17.18
Restricted stock units, shares vested, total fair value     $ 65,000,000 $ 84,000,000 $ 34,000,000
Weighted-average grant date fair value (usd per share) $ 36.13   $ 36.13 $ 14.58  
Restricted stock units, total unrecognized compensation expense, net of estimated forfeitures $ 85,000,000   $ 85,000,000    
Performance Shares | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Range of target shares granted     0.00%    
Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Range of target shares granted     250.00%    
ESPP          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Purchase price of common stock     85.00%    
Maximum percent of earnings withheld during offering period 10.00%   10.00%    
Offering period     6 months    
Shares available for issuance (shares) 42,000,000   42,000,000    
Expected dividends     0.00% 0.00% 0.00%
Weighted-average remaining contractual life (in years)     4 months 13 days    
Weighted-average grant date fair value (usd per share) $ 9.96   $ 9.96 $ 4.71 $ 3.46
Share-based compensation, common stock purchased 1,400,000 1,800,000      
Weighted average purchase price (USD per share) $ 23.77 $ 16.18 $ 23.77    
Restricted stock units, total unrecognized compensation expense, net of estimated forfeitures $ 9,000,000   $ 9,000,000    
Aggregate cash proceeds     $ 62,000,000    
Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for issuance (shares) 30,000,000   30,000,000