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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2023, 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, 2023
Date of GrantOptions
Outstanding		Options
Exercisable
January 3, 20231,071,943 $48.00 $47.400 989,048 70,562 
January 3, 2022713,438 $62.00 $61.980 611,848 53,355 
January 4, 2021741,510 $48.00 $47.650 591,206 211,323 
January 2, 2020902,263 $38.00 $37.230 658,884 322,242 
January 2, 20191,316,924 $26.00 $25.705 758,611 451,061 
January 2, 20181,087,936 $27.50 $27.270 541,026 419,460 
January 3, 20171,529,578 $23.50 $23.475 523,828 426,290 
April 19, 20161,690,880 $23.00 $22.870 245,075 188,177 
April 21, 20151,786,440 $21.00 $20.630 54,552 54,552 
Total10,840,912 4,974,078 2,197,022 
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, 20235,374,736 $34.37 5.66
Granted1,071,943 $48.00 9.00
Exercised(1,170,693)$25.69 
Cancelled/forfeited(301,908)$45.00 
Outstanding as of December 31, 20234,974,078 $38.70 5.99
Exercisable as of December 31, 20232,197,022 $30.88 4.54
 
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
(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, 20234.0% 5.002.6% 29.58 %$11.62 
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 
Schedule of Common Stock Outstanding Roll Forward
Shares of common stock outstanding were as follows:
202320222021
Balance at beginning of year570,811,674 575,464,682 574,159,575 
Stock options exercised1,170,693 346,992 1,305,107 
Purchases of common stock— (5,000,000)— 
Balance at end of year571,982,367 570,811,674 575,464,682 
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 per share calculation because they were anti-dilutive:
Reconciliation202320222021
Basic weighted average shares outstanding571,271,846 573,777,790 574,808,030 
Weighted shares assumed upon exercise of stock options1,736,762 1,845,324 2,309,026 
Diluted weighted average shares outstanding573,008,608 575,623,114 577,117,056 
Anti-Dilutive Options Excluded
Summary of Anti-dilutive Options Excluded202320222021
Options to purchase shares of common stock1,568,460 1,335,898 678,310 
Weighted average exercise prices of options$53.80 55.25 48.00