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Note 15 - Share Repurchase Programs (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 36 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 18, 2022 | May 26, 2021 | Mar. 31, 2022 | Sep. 30, 2021 | Mar. 31, 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 |
Treasury Stock, Shares, Acquired (in shares) |  |  |  | 11,014,201 | [1] |  | 6,691,421 | [1] | 83,300,000 |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | [1],[2] |  |  | $ 249.95 |  |  | $ 209.50 |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  |  |  | $ 3,193 |  |  | $ 1,402 |  |  |
Treasury Stock [Member] |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) |  |  |  | 11,000,000.0 |  |  | 6,700,000 |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  |  |  | $ 2,753 |  |  | $ 1,402 |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  |  |  | $ 440 |  |  | $ (0) |  |  |
Accelerated Share Repurchase Programs (ASRs) [Member] |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) |  | 7,012,232 | 7,209,156 | 7,012,232 |  | 1,983,859 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  | $ 250.99 |  |  |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  | $ 2,200 | $ 2,000 |  |  |  |  |  |  |
Accelerated Share Repurchase Programs (ASRs) [Member] | Treasury Stock [Member] |  |  |  |  |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  | 1,800 |  |  |  |  |  |  |  |
Accelerated Share Repurchase Programs (ASRs) [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  | $ 400 |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) |  |  |  |  |  |  |  |  |  | 100,000,000
[1] | Includes 7,012,232 shares repurchased in February 2022 under accelerated share repurchase programs.
[2] | 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 initial settlement of the 2022 accelerated share repurchase programs was $250.99.

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