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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 28, 2019
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 2019, 2018 and 2017 (net income in millions and shares in thousands):
 
2019
 
2018
 
2017
Numerator:
 
 
 
 
 
Net income
$
55,256

 
$
59,531

 
$
48,351

 
 
 
 
 
 
Denominator:
 
 
 
 
 
Weighted-average basic shares outstanding
4,617,834

 
4,955,377

 
5,217,242

Effect of dilutive securities
31,079

 
44,732

 
34,450

Weighted-average diluted shares
4,648,913

 
5,000,109


5,251,692

 
 
 
 
 
 
Basic earnings per share
$
11.97

 
$
12.01

 
$
9.27

Diluted earnings per share
$
11.89

 
$
11.91

 
$
9.21