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Note 1 - Basis of Presentation and Recent Accounting Pronouncements (Details Textual) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Sep. 03, 2013
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jan. 01, 2018
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Cash And Cash Equivalents   $ 275   $ 344      
Outstanding inter-company loans   394   358      
Short-Term Intercompany Loans   95   59      
Net decrease in cash and cash equivalents and restricted cash   76 $ 89 109 $ 122 $ 158  
Decrease to the opening balance of retained earnings   205   174      
ASU 2014-09 [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Decrease to the opening balance of retained earnings             $ 184
ASU 2014-09 [Member] | Effect of Change Higher (Lower) [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Decrease to the opening balance of retained earnings   8         $ 10
Amended Credit Agreement [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Letter of credit   $ 79   96      
Termination date   Jun. 05, 2019          
United States [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Cash And Cash Equivalents   $ 133   172      
China [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Cash And Cash Equivalents   77   $ 108      
First Lien Term Loan [Member]              
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]              
Debt Instrument Face Amount $ 420 $ 395          
Debt Instrument, Maturity Date Sep. 03, 2019 Sep. 03, 2019