XML 52 R43.htm IDEA: XBRL DOCUMENT v3.22.1
Note 4 - Stock-based Compensation - Additional Information Regarding Stock Option Exercises (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Intrinsic value of stock options exercised $ 42 $ 23
Cash received from option exercises 15 30
Treasury shares repurchased for employee payroll taxes (5) (6)
Tax benefit realized from option exercises 5 4
Aggregate grant-date fair value of stock options vested $ 13 $ 14