Note 17 - Other Postretirement Benefits (Details) - Other Post-retirement Benefits Which Reflects Expected Future Services Expected to Be Paid $ in Millions	Dec. 31, 2015 USD ($)
Note 17 - Other Postretirement Benefits (Details) - Other Post-retirement Benefits Which Reflects Expected Future Services Expected to Be Paid [Line Items]
2016	$ 5
Other Postretirement Benefit Plans [Member]
Note 17 - Other Postretirement Benefits (Details) - Other Post-retirement Benefits Which Reflects Expected Future Services Expected to Be Paid [Line Items]
2016	5
2017	5
2018	5
2019	4
2020	4
2021	$ 19