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Note 7 - Leases - Summary of Income Recognized on Lease Arrangements (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Lease income - operating leases:        
Lease income $ 2 $ 2 $ 7 $ 6
Variable lease income 2 1 4 3
Total lease income $ 4 $ 3 $ 11 $ 9