Note 14 - Debt - Schedule of Unsecured Debt (Details) (Parentheticals) - Unsecured Debt [Member] |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| 2.150% Notes, Due February 5, 2027 [Member] | |
| Debt Instrument, Interest Rate | 2.375% |
| Debt Instrument, Maturity Date | May 20, 2031 |
| 2.400% Notes, Due February 5, 2030 [Member] | |
| Debt Instrument, Interest Rate | 3.20% |
| Debt Instrument, Maturity Date | May 20, 2041 |
| 3.250% Notes, Due February 5, 2050 [Member] | |
| Debt Instrument, Interest Rate | 3.55% |
| Debt Instrument, Maturity Date | May 20, 2061 |
| 3.750% Notes, Due February 5, 2070 [Member] | |
| Debt Instrument, Interest Rate | 2.375% |
| Debt Instrument, Maturity Date | May 20, 2031 |
| 3.250% Notes, Due February 5, 2050, Issued April 7, 2020 [Member] | |
| Debt Instrument, Interest Rate | 2.95% |
| Debt Instrument, Maturity Date | Mar. 10, 2052 |