Note 14 - Debt - Schedule of Unsecured Debt (Details) (Parentheticals) - Unsecured Debt [Member]	6 Months Ended
Jun. 30, 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%
The 3.5% Notes, Due February 14, 2053 [Member]
Debt Instrument, Interest Rate	3.50%
3.85% Notes, Due February 14, 2072 [Member]
Debt Instrument, Interest Rate	3.85%
Debt Instrument, Maturity Date	Feb. 14, 2072

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration