Note 2 - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Restricted Cash And Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 313	$ 344
Long-term restricted cash	12	17
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	333	369
Other Current Assets [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash included in Other current assets	$ 8	$ 8