Note 7 - Leases - Maturities (Details) $ in Millions	Dec. 31, 2023 USD ($)
Operating Leases, 2024	$ 62
Finance Leases, 2024	9
Operating Leases, 2025	57
Finance Leases, 2025	8
Operating Leases, 2026	52
Finance Leases, 2026	8
Operating Leases, 2027	45
Finance Leases, 2027	7
Operating Leases, 2028	37
Finance Leases, 2028	4
Operating Leases, Thereafter	212
Finance Leases, Thereafter	32
Operating Leases, Total lease payments	465
Finance Leases, Total lease payments	68
Operating Leases, Less: interest	139
Finance Leases, Less: interest	19
Operating Leases, Present value of lease liabilities	326
Finance Leases, Present value of lease liabilities	$ 49