Annual report pursuant to Section 13 and 15(d)

Employee Equity Incentive Plans (Detail)

v3.20.4
Employee Equity Incentive Plans (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Market-Based Restricted Stock Units Performance Period (In Years) 3 years    
Share-based Payment Arrangement, Noncash Expense $ 1,854 $ 1,705 $ 1,546
Tax Benefit from Compensation Expense $ 380 359 399
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Award Requisite Service Period 4 years    
RSUs Vested in Period, Total Fair Value $ 1,900 1,900 2,000
RSUs Aggregate Intrinsic Value, Vested 1,300 $ 1,300 $ 1,200
Compensation Cost Not yet Recognized $ 2,400    
Compensation Cost Not yet Recognized, Period for Recognition 1 year 3 months 18 days    
Estimated Values And Weighted Average Assumptions [Abstract]      
Estimated values (in dollars per share) $ 54.82 $ 48.06 $ 48.95
Risk-free interest rate 0.40% 2.30% 2.40%
Dividend yield 2.30% 2.50% 2.40%
Restricted Stock Units Activity [Roll Forward]      
Number of RSUs outstanding, beginning balance 84.1    
Number of RSUs granted 40.4    
Number of RSUs vested (33.3)    
Number of RSUs forfeited (8.5)    
Number of RSUs outstanding, ending balance 82.7 84.1  
Number of RSUs expected to vest 76.7    
Weighted average grant date fair value, RSUs outstanding $ 50.14 $ 43.86  
Weighted average grant date fair value, RSUs granted   54.82  
Weighted average grant date fair value, RSUs vested   40.54  
Weighted average grant date fair value, RSUs forfeited   47.89  
Weighted average grant date fair value, RSUs expected to vest   $ 50.06  
Share-based Payment Arrangement, Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Expiration Period 10 years    
Market-Based Restricted Stock Units (OSUs) [Member]      
Estimated Values And Weighted Average Assumptions [Abstract]      
Volatility (percent) 30.00% 25.00% 22.00%
Restricted Stock Units Activity [Roll Forward]      
Number of RSUs outstanding, ending balance 12.0    
Market-Based Restricted Stock Units (OSUs) [Member] | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Vesting range (percent) 0.00%    
Market-Based Restricted Stock Units (OSUs) [Member] | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Vesting range (percent) 200.00%    
Stock Purchase Plan RIghts [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Compensation Cost Not yet Recognized $ 48    
Compensation Cost Not yet Recognized, Period for Recognition 2 months    
Stock Purchase Plan Shares Issued in Period 21.0 17.0 14.0
Employee Purchases, Amount $ 876 $ 688 $ 468
2006 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Number of Shares Authorized 866.0    
Number of Shares Available for Grant 193.0    
2006 Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Number of Shares Authorized 523.0    
Number of Shares Available for Grant 249.0    
Stock Purchase Plan, Purchase Price of Common Stock, Percent 85.00%