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Note 16 - Share Repurchase Programs (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 36 Months Ended
Feb. 18, 2022
May 26, 2021
Oct. 19, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
 [3]
Sep. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2022
Apr. 01, 2022
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)           150,000,000             150,000,000 100,000,000
Treasury Stock, Shares, Acquired (in shares)       9,490,339 [1] 3,100,683 [2] 11,014,201 [3] 8,604,239 [1] 12,204,409 [2] 6,691,421 12,600,000 23,605,223 27,500,069 83,300,000  
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) [4]       $ 221.52 [1] $ 232.87 [2] $ 249.95 [3] $ 210.31 [1] $ 222.46 [2] $ 209.50   $ 236.28 $ 215.51    
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess       $ 2,102     $ 1,409       $ 5,577 $ 5,926    
Subsequent Event [Member]                            
Treasury Stock, Shares, Acquired (in shares)     1,300,000                      
Treasury Stock, Value, Acquired, Cost Method     $ 260                      
Accelerated Share Repurchase Programs (ASRs) [Member]                            
Treasury Stock, Shares, Acquired (in shares) 7,012,232 7,209,156     1,847,185 7,012,232 1,983,859 7,209,156            
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)                     $ 248.32 $ 217.56    
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess $ 2,200 $ 2,000                        
[1] Includes an incremental 1,983,859 shares received upon final settlement in 2021 under accelerated share repurchase programs.
[2] Includes an incremental 1,847,185 shares received upon final settlement in 2022 and 7,209,156 shares repurchased in 2021 under accelerated share repurchase programs.
[3] Includes 7,012,232 shares repurchased in 2022 under accelerated share repurchase programs.
[4] In the period of the final settlement, the average price paid under the accelerated share repurchase programs is calculated based on the total program value less the value assigned to the initial delivery of shares. The average price of the completed 2022 and 2021 accelerated share repurchase programs was $248.32 and $217.56, respectively.