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Share-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Stock Option Activity [Table Text Block] Stock option activity for the year ended December 31, 2022 is summarized in the table below:
SharesWeighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual Life
Aggregate
Intrinsic Value
 (in millions) (in years)(in millions)
Outstanding at beginning of period25 $241 
Granted459 
Exercised(5)215 
Forfeited(1)356 
Outstanding at end of period23 281 5.8$5,914 
Exercisable at end of period13 213 4.44,170 
Vested and expected to vest, end of period23 278 5.75,854 
Restricted Share Activity [Table Text Block] Restricted share activity for the year ended December 31, 2022 is summarized in the table below:
(shares in millions)SharesWeighted-Average
Grant Date
Fair Value
per Share
Nonvested at beginning of period$303 
Granted483 
Vested(2)287 
Nonvested at end of period401 
Other Share-Based Compensation Data [Table Text Block]
Other Share-Based Compensation Data
(in millions, except per share amounts)For the Years Ended December 31,
202220212020
Stock Options
Weighted-average grant date fair value of shares granted, per share$116 $71 $54 
Total intrinsic value of stock options exercised1,419 1,519 1,736 
Restricted Shares
Weighted-average grant date fair value of shares granted, per share483 352 303 
Total fair value of restricted shares vested$760 $560 $574 
Employee Stock Purchase Plan
Number of shares purchased
Share-Based Compensation Items
Share-based compensation expense, before tax$925 $800 $679 
Share-based compensation expense, net of tax effects836 719 619 
Income tax benefit realized from share-based award exercises207 173 208 
(in millions, except years)December 31, 2022
Unrecognized compensation expense related to share awards$1,165 
Weighted-average years to recognize compensation expense1.3
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] The principal assumptions the Company used in calculating grant-date fair value for stock options were as follows:
For the Years Ended December 31,
 202220212020
Risk-free interest rate1.9% - 4.3%0.7% - 1.2%0.2% - 1.4%
Expected volatility30.6% -30.8%29.2% - 29.8%22.2% - 29.5%
Expected dividend yield1.2%1.3% - 1.5%1.4% - 1.7%
Forfeiture rate5.0%5.0%5.0%
Expected life in years4.74.85.1