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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 26, 2020
Accounting Policies [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table shows the computation of basic and diluted earnings per share for 2020, 2019 and 2018 (net income in millions and shares in thousands):
202020192018
Numerator:
Net income
$57,411 $55,256 $59,531 
Denominator:
Weighted-average basic shares outstanding
17,352,119 18,471,336 19,821,510 
Effect of dilutive securities
176,095 124,315 178,925 
Weighted-average diluted shares
17,528,214 18,595,651 20,000,435 
Basic earnings per share
$3.31 $2.99 $3.00 
Diluted earnings per share
$3.28 $2.97 $2.98