Note 1 - Cumulative Effect of Changes made to Consolidated Statement of Financial Position on Adoption of Accounting Standards (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Liabilities
Other current liabilities	$ 216		$ 217
Other long-term liabilities	183		202
Equity (Deficit)
Accumulated deficit	(187)		(174)
Balances without Adoption of ASU 2014-09 [Member]
Liabilities
Other current liabilities			217
Other long-term liabilities			202
Equity (Deficit)
Accumulated deficit			$ (174)
ASU 2014-09 [Member]
Liabilities
Other current liabilities		$ 219
Other long-term liabilities		210
Equity (Deficit)
Accumulated deficit		(184)
ASU 2014-09 [Member] | Balances without Adoption of ASU 2014-09 [Member]
Liabilities
Other current liabilities	214
Other long-term liabilities	178
Equity (Deficit)
Accumulated deficit	(180)
ASU 2014-09 [Member] | Effect of Change Higher (Lower) [Member]
Liabilities
Other current liabilities	2	2
Other long-term liabilities	5	8
Equity (Deficit)
Accumulated deficit	$ (7)	$ (10)