Quarterly report pursuant to Section 13 or 15(d)

Common Stock and Employee Equity Plans (Schedule of Common Shares Outstanding) (Details)

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Common Stock and Employee Equity Plans (Schedule of Common Shares Outstanding) (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance, beginning of period (in shares)     1,175,000,000  
Balance, end of period (in shares) 1,179,000,000   1,179,000,000  
Common stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance, beginning of period (in shares) 1,171,000,000 1,082,000,000 1,170,000,000 1,005,000,000
Common stock issued under employee equity plans (in shares) 3,000,000 4,000,000 4,000,000 5,000,000
Issuance of common stock upon warrant exercise (in shares) 0 0 0 75,000,000
Balance, end of period (in shares) 1,174,000,000 1,086,000,000 1,174,000,000 1,086,000,000
Treasury stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of treasury stock to partially settle debt (in shares) 0 0 0 1,000,000