Note 1 - Cumulative Effect of Changes made to Consolidated Statement of Financial Position on Adoption of Accounting Standards (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Liabilities
Other current liabilities	$ 208		$ 217
Other long-term liabilities	198		202
Equity (Deficit)
Accumulated deficit	(205)		(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	206
Other long-term liabilities	192
Equity (Deficit)
Accumulated deficit	(197)
ASU 2014-09 [Member] | Effect of Change Higher (Lower) [Member]
Liabilities
Other current liabilities	2	2
Other long-term liabilities	6	8
Equity (Deficit)
Accumulated deficit	$ (8)	$ (10)