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Note 14 - Debt - Schedule of Unsecured Debt (Details) - Unsecured Debt [Member]
$ in Millions
Dec. 31, 2021
USD ($)
2.150% Notes, Due February 5, 2027 [Member]  
Debt Instrument $ 850
2.400% Notes, Due February 5, 2030 [Member]  
Debt Instrument 1,000
3.250% Notes, Due February 5, 2050 [Member]  
Debt Instrument 650
3.750% Notes, Due February 5, 2070 [Member]  
Debt Instrument 150
3.250% Notes, Due February 5, 2050, Issued April 7, 2020 [Member]  
Debt Instrument $ 850