XML 142 R128.htm IDEA: XBRL DOCUMENT v3.5.0.2
Note 17 - Weighted-average Assumed Healthcare Cost Trend Rates Used to Compute Other Post-retirement Amounts (Details) - Other Postretirement Benefit Plans [Member]
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Weighted Average Assumed Healthcare Cost Trend Rates Used To Compute Other Postretirement Amounts [Line Items]    
Healthcare cost trend 5.81% 6.47%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.21% 4.65%
Year that the rate reaches the ultimate trend rate 2022 2021