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Note 3 - Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Outstanding, Options (in shares) 1,974  
Outstanding, weighted average exercise price (in dollars per share) $ 169.64  
Outstanding, Weighted-Average Remaining Contractual Term (Year) 6 years 6 months 6 years
Outstanding, Aggregate Intrinsic Value $ 73 $ 86
Granted, Options (in shares) 351  
Granted, weighted average exercise price (in dollars per share) $ 202.81  
Exercised, Options (in shares) (34)  
Exercised, weighted average exercise price (in dollars per share) $ 92.22  
Forfeited or expired, Options (in shares) (1)  
Forfeited or expired, weighted average exercise price (in dollars per share) $ 244.35  
Outstanding, Options (in shares) 2,290 1,974
Outstanding, weighted average exercise price (in dollars per share) $ 175.84 $ 169.64
Vested or expected to vest, Options (in shares) 2,269  
Vested or expected to vest, weighted average exercise price (in dollars per share) $ 175.49  
Vested or expected to vest, Weighted-Average Remaining Contractual Term (Year) 6 years 6 months  
Vested or expected to vest, Aggregate Intrinsic Value $ 73  
Exercisable, Options (in shares) 1,617  
Options, exercisable, Weighted-Average Exercise Price (in dollars per share) $ 159.16  
Options, Exercisable, Weighted-Average Remaining Contractual Term (Year) 5 years 4 months 24 days  
Options, Exercisable, Aggregate Intrinsic Value $ 73