Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Service cost	$ 90	$ 82	$ 70
Interest cost	144	160	131
Expected return on plan assets	(178)	(174)	(169)
Amortization of prior service cost (credit)	6	6	5
Recognition of actuarial loss (gain)	(95)	394
Total net periodic benefit expense	227	103	7
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Curtailment effects		(3)
Settlements	(1)	(2)
Current year actuarial loss (gain)	191	212	(264)
Recognition of actuarial (loss) gain	(165)	(29)	30
Current year prior service cost		25
Amortization of prior service (cost) credit	(6)	(6)	(5)
Total recognized in other comprehensive (income) loss	19	197	(239)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	246	300	(232)
Recognition of Actuarial Gain [Member]
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Recognition of actuarial loss (gain)	165	29	(30)
United States Pension Plan of US Entity [Member]
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Service cost	64	55	60
Interest cost	126	137	115
Expected return on plan assets	(166)	(159)	(158)
Amortization of prior service cost (credit)	7	7	6
Recognition of actuarial loss (gain)	(87)	327
Total net periodic benefit expense	193	44	(18)
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Current year actuarial loss (gain)	189	198	(274)
Recognition of actuarial (loss) gain	(162)	(4)	41
Current year prior service cost		25
Amortization of prior service (cost) credit	(7)	(7)	(6)
Total recognized in other comprehensive (income) loss	20	212	(239)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	213	256	(257)
United States Pension Plan of US Entity [Member] | Recognition of Actuarial Gain [Member]
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Recognition of actuarial loss (gain)	162	4	(41)
Foreign Pension Plan [Member]
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Service cost	26	27	10
Interest cost	18	23	16
Expected return on plan assets	(12)	(15)	(11)
Amortization of prior service cost (credit)	(1)	(1)	(1)
Recognition of actuarial loss (gain)	(8)	67
Total net periodic benefit expense	34	59	25
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Curtailment effects		(3)
Settlements	(1)	(2)
Current year actuarial loss (gain)	2	14	10
Recognition of actuarial (loss) gain	(3)	(25)	(11)
Amortization of prior service (cost) credit	1	1	1
Total recognized in other comprehensive (income) loss	(1)	(15)	0
Total recognized in net periodic benefit cost and other comprehensive (income) loss	33	44	25
Foreign Pension Plan [Member] | Recognition of Actuarial Gain [Member]
Note 13 - Employee Retirement Plans (Details) - Net Periodic Benefit Expense [Line Items]
Recognition of actuarial loss (gain)	$ 3	$ 25	$ 11