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Note 15 - Share Repurchase Programs (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended | 18 Months Ended | 36 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 18, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | 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) |  | 0 | 606,581 | 2,908,703 | 9,490,339 | 3,100,683 | [1] | 11,014,201 | [2] | 3,515,284 | 23,605,223 | 19,600,000 | 83,300,000 |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  | $ 0 | $ 199.81 | $ 203.19 | $ 221.52 | $ 232.87 | [1],[3] | $ 249.95 | [2],[3] | $ 202.61 | $ 236.28 |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess |  | $ (0) |  |  | $ 2,102 |  |  |  |  | $ 712 | $ 5,577 |  |  |
Accelerated Share Repurchase Programs (ASRs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) | 7,012,232 |  |  |  |  | 1,847,185 |  | 7,012,232 |  |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 248.32 |  |  |
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess | $ 2,200 |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Includes 1,847,185 shares repurchased in 2022 under accelerated share repurchase programs.
[2] | Includes 7,012,232 shares repurchased in 2022 under accelerated share repurchase programs.
[3] | 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 accelerated share repurchase programs was $248.32.

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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