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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2022
Stockholders' Equity Note [Abstract]  
Stock Option Plan Activity and Stock Options Granted
The following tables summarize the details of options granted under our stock option plans that were still outstanding as of December 31, 2022, and the assumptions used to value those grants. All such grants were effective at the close of business on the date of grant.
Options
Granted		Option Exercise
Price		Closing Stock
Price on Date
of Grant		December 31, 2022
Date of GrantOptions
Outstanding		Options
Exercisable
January 3, 2022713,438 $62.00 $61.980 683,369 53,355 
January 4, 2021741,510 $48.00 $47.650 671,201 26,643 
January 2, 2020902,263 $38.00 $37.230 772,002 266,122 
January 2, 20191,316,924 $26.00 $25.705 935,052 406,580 
January 2, 20181,087,936 $27.50 $27.270 689,133 417,667 
January 3, 20171,529,578 $23.50 $23.475 670,372 512,248 
April 19, 20161,690,880 $23.00 $22.870 493,803 371,455 
April 21, 20151,786,440 $21.00 $20.630 349,910 273,672 
April 22, 20141,910,000 $28.00 $25.265 109,894 109,894 
Total11,678,969 5,374,736 2,437,636 
A summary of activities under our stock option plans consisted of the following:
Options
Outstanding
Exercise
Price (1)
Remaining
Life (2)
Outstanding as of January 1, 20225,173,270 $30.23 6.08
Granted713,438 $62.00 9.00
Exercised(346,992)$26.78 
Cancelled/forfeited(164,980)$40.00 
Outstanding as of December 31, 20225,374,736 $34.37 5.66
Exercisable as of December 31, 20222,437,636 $27.14 4.30
 
Options
Outstanding
Exercise
Price (1)
Remaining
Life (2)
Outstanding as of January 1, 20215,914,757 $26.73 6.22
Granted741,510 $48.00 9.00
Exercised(1,305,107)$24.34 
Cancelled/forfeited(177,890)$31.22 
Outstanding as of December 31, 20215,173,270 $30.23 6.08
Exercisable as of December 31, 20211,693,805 $25.11 4.68
(1) Weighted average exercise price.
(2) Weighted average remaining contractual life in years.
Fair Value Assumptions for Options Granted
Date of GrantRisk-free
Interest Rate		Expected Life
of Option in
Years		Expected
Dividend
Yield		Expected
Stock
Volatility		Estimated Fair
Value of Stock
Option
January 3, 20221.3% 5.001.7% 28.52 %$13.68 
January 4, 20210.4% 5.002.0% 29.17 %$9.57 
January 2, 20201.7% 5.002.4% 25.70 %$6.81 
January 2, 20192.5% 5.002.9% 23.96 %$4.40 
January 2, 20182.2% 5.002.3% 23.45 %$5.02 
January 3, 20171.9% 5.002.6% 24.49 %$4.20 
April 19, 20161.3% 5.002.6% 26.34 %$4.09 
April 21, 20151.3% 5.002.7% 26.84 %$3.68 
April 22, 20141.8% 5.002.0% 28.55 %$4.79 
Schedule of Common Stock Outstanding Roll Forward
Shares of common stock outstanding were as follows:
202220212020
Balance at beginning of year575,464,682 574,159,575 574,128,911 
Stock options exercised346,992 1,305,107 1,630,664 
Purchases of common stock(5,000,000)— (1,600,000)
Balance at end of year570,811,674 575,464,682 574,159,575 
Reconciliation of Denominators used in Computation of Basic and Diluted Earnings per Share
The following tables present a reconciliation of the denominators used in the computation of basic and diluted earnings per share and a summary of the options to purchase shares of common stock which were excluded from the diluted earnings calculation because they were anti-dilutive:
Reconciliation202220212020
Basic weighted average shares outstanding573,777,790 574,808,030 573,778,761 
Weighted shares assumed upon exercise of stock options1,845,324 2,309,026 1,893,193 
Diluted weighted average shares outstanding575,623,114 577,117,056 575,671,954 
Anti-Dilutive Options Excluded
Summary of Anti-dilutive Options Excluded202220212020
Options to purchase shares of common stock1,335,898 678,310 846,041 
Weighted average exercise prices of options$55.25 48.00 38.00