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Note 2 - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 216	$ 246
Restricted cash included in Other current assets	$ 23	$ 8
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherCurrentAssetsMember	us-gaap:OtherCurrentAssetsMember
Long-term restricted cash	$ 19	$ 11
Cash included in assets held for sale		2
Total cash, cash equivalents and restricted cash shown in the Statement of Cash Flows	$ 258	$ 267	$ 293	$ 369

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.

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