Note 7 - Other Current Liabilities (Details) (Parentheticals) - USD ($) $ in Millions	Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 03, 2013
Other Current Liabilities [Line Items]
Disposal group including discontinued operation consideration				$ 325
Discontinued operation contingent consideration			$ 10	$ 35
Maximum potential payment related to deferred consideration on disposed businesses		$ 14
Subsequent Event [Member]
Other Current Liabilities [Line Items]
Discontinued operation consideration repayment	$ 10