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Note 4 - Schedule of Other Long-Term Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Other Assets Noncurrent Disclosure [Abstract]    
Pension assets $ 126 $ 82
Estimated workers' compensation recoveries 17 17
Long-term receivables, net of reserve of $4 and $4, respectively 12 13
Other 33 32
Total $ 188 $ 144