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Note 2 - Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 973	$ 960	$ 1,799
Total cash, cash equivalents, and restricted cash equivalents	987	983	1,818
Other Current Assets [Member]
Restricted cash equivalents	10	19	7
Other Noncurrent Assets [Member]
Restricted cash equivalents	$ 4	$ 4	$ 12

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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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