Note 5 - Supplemental Balance Sheet and Cash Flow Information - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Cash and cash equivalents	$ 477	$ 469	$ 507	$ 494
Restricted cash included in other current assets	6	7	6	9
Restricted cash included in other noncurrent assets	9	10	10	9
Total cash, cash equivalents and restricted cash	$ 492	$ 486	$ 523	$ 512