Note 2 - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 225	$ 233
Restricted cash included in Other current assets	$ 18	$ 8
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentAssetsMember	us-gaap:OtherCurrentAssetsMember
Long-term restricted cash	$ 36	$ 11
Cash included in assets held for sale		15
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	$ 279	$ 267	$ 256	$ 369