Note 7 - Lease - Maturities of Lease Liabilities (Details) $ in Millions	Dec. 31, 2021 USD ($)
Operating leases 2022	$ 103
Operating leases 2023	110
Operating leases 2024	97
Operating leases 2025	85
Operating leases 2026	78
Operating leases after 2026	553
Operating leases, gross	1,026
Operating leases, imputed discount	(241)
Operating leases, net	785
Finance leases 2022	22
Finance leases 2023	27
Finance leases 2024	21
Finance leases 2025	15
Finance leases 2026	32
Finance leases after 2026	142
Finance leases, gross	259
Finance leases, imputed discount	(76)
Finance leases, net	$ 183