Note 6 - Employee Benefit Plans (Details) - Components of Pension and Other Retirement Benefit Costs (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plan [Member]
Note 6 - Employee Benefit Plans (Details) - Components of Pension and Other Retirement Benefit Costs [Line Items]
Service cost	$ 6	$ 8
Interest cost	12	10
Expected return on plan assets	(16)	(16)
Recognized actuarial loss	5	8
Net periodic benefit cost	7	10
Other Postretirement Benefit Plan [Member]
Note 6 - Employee Benefit Plans (Details) - Components of Pension and Other Retirement Benefit Costs [Line Items]
Service cost	1	1
Interest cost	4	3
Expected return on plan assets	(2)	(1)
Net amortization of prior service cost	(1)	(1)
Recognized actuarial loss	1	2
Net periodic benefit cost	$ 3	$ 4