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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 29, 2018
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 2018, 2017 and 2016 (net income in millions and shares in thousands):
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net income
$
59,531

 
$
48,351

 
$
45,687

 
 
 
 
 
 
Denominator:
 
 
 
 
 
Weighted-average basic shares outstanding
4,955,377

 
5,217,242

 
5,470,820

Effect of dilutive securities
44,732

 
34,450

 
29,461

Weighted-average diluted shares
5,000,109

 
5,251,692


5,500,281

 
 
 
 
 
 
Basic earnings per share
$
12.01

 
$
9.27

 
$
8.35

Diluted earnings per share
$
11.91

 
$
9.21

 
$
8.31