Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Recognition of Actuarial Gain [Member] | Pension Plan [Member]
Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost [Line Items]
Recognition of actuarial gain				$ (41)
Pension Plan [Member]
Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost [Line Items]
Service cost	30	16	62	53
Interest cost	42	33	118	99
Expected return on plan assets	(45)	(42)	(131)	(126)
Amortization of prior service cost (credit)	1	1	4	3
Total pension and postretirement benefit expense (credit)	28	8	53	(12)
Other Pension Plan, Postretirement or Supplemental Plans [Member]
Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost [Line Items]
Service cost	4	3	9	10
Interest cost	10	10	28	29
Amortization of net loss		3		11
Amortization of prior service cost (credit)	(3)	(1)	(5)	(4)
Total pension and postretirement benefit expense (credit)	$ 11	$ 15	$ 32	$ 46