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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Schedule of Computation of Basic and Diluted Earnings Per Share
The table below presents the computation of basic and diluted earnings per share (in millions, except for per share information):
 Years Ended December 31,
 202020192018
Basic:   
Net income$823.4 $1,046.9 $722.2 
Weighted-average shares outstanding622.6 624.8 627.6 
Basic earnings per share$1.32 $1.68 $1.15 
Diluted:   
Net income$823.4 $1,046.9 $722.2 
Weighted-average shares outstanding622.6 624.8 627.6 
Dilutive effect of stock plans9.3 11.9 13.3 
Dilutive weighted-average shares outstanding631.9 636.7 640.9 
Diluted earnings per share$1.30 $1.64 $1.13 
Schedule of Stock-Based Compensation Expense
Total stock-based compensation expense was as follows (in millions):
 Years Ended December 31,
 202020192018
Cost of sales$17.2 $14.7 $11.4 
Selling, general, and administrative expenses56.6 51.2 46.3 
Research and development expenses18.8 15.4 13.3 
Total stock-based compensation expense92.6 81.3 71.0 
Income tax benefit(15.4)(14.8)(13.4)
Total stock-based compensation expense, net of tax$77.2 $66.5 $57.6