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Note 13 - Debt - Schedule of Unsecured Debt (Details) (Parentheticals) - Unsecured Debt [Member]	3 Months Ended
	Mar. 31, 2022
2.8% Notes, Due February 14, 2032 [Member]
Debt Instrument, Interest Rate	2.80%
Debt Instrument, Maturity Date	Feb. 14, 2032
3.375% Notes, Due February 14, 2042 [Member]
Debt Instrument, Interest Rate	3.375%
Debt Instrument, Maturity Date	Feb. 14, 2042
The 3.5% Notes, Due February 14, 2053 [Member]
Debt Instrument, Interest Rate	3.50%
Debt Instrument, Maturity Date	Feb. 14, 2053
3.85% Notes, Due February 14, 2072 [Member]
Debt Instrument, Interest Rate	3.85%
Debt Instrument, Maturity Date	Feb. 14, 2072

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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