Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 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)		$ (41)
Pension Plan [Member]
Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost [Line Items]
Service cost	16	18	32	37
Interest cost	38	32	76	66
Expected return on plan assets	(43)	(42)	(86)	(84)
Amortization of prior service cost (credit)	1	1	3	2
Total pension and postretirement benefit expense (credit)	12	(32)	25	(20)
Other Pension Plan, Postretirement or Supplemental Plans [Member]
Note 13 - Employee Retirement Plans (Details) - Summary of Net Periodic Benefit Cost [Line Items]
Service cost	2	3	5	7
Interest cost	9	9	18	19
Amortization of net loss		4		8
Amortization of prior service cost (credit)	(1)	(1)	(2)	(3)
Total pension and postretirement benefit expense (credit)	$ 10	$ 15	$ 21	$ 31