Note 13 - Employee Retirement Plans (Details) - Obligations and Funded Status Schedule - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Change in benefit obligation
Benefit obligation at beginning of year	$ 3,809	$ 3,300
Service cost	90	82	$ 70
Interest cost	144	160	131
Plan participants’ contributions	1	1
Acquisitions		103
Amendments		25
Actuarial (gain) loss	(95)	394
Other	(8)	(3)
Benefits paid	(188)	(207)
Foreign currency translation	(38)	(46)
Benefit obligation at end of year	3,715	3,809	3,300
Change in plan assets
Fair value of plan assets at beginning of year	3,263	2,896
Actual (loss) gain on plan assets	(108)	355
Employer contributions	116	147
Plan participants’ contributions	1	1
Acquisitions		97
Benefits paid	(188)	(207)
Foreign currency translation	(26)	(26)
Fair value of plan assets at end of year	3,058	3,263	2,896
Funded status at end of year
Fair value of plan assets	3,263	3,263	2,896	$ 3,058	$ 3,263
Benefit obligations	(3,809)	(3,809)	(3,300)	(3,715)	(3,809)
Funded status of plans				(657)	(546)
Amounts recognized in the consolidated balance sheets consist of:
Noncurrent asset				50	47
Current liability				(35)	(41)
Noncurrent liability				(672)	(552)
Recognized liability				(657)	(546)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss				332	308
Prior service cost (credit)				35	41
Amount recognized at end of year				367	349
United States Pension Plan of US Entity [Member]
Change in benefit obligation
Benefit obligation at beginning of year	3,222	2,844
Service cost	64	55	60
Interest cost	126	137	115
Plan participants’ contributions	1	1
Amendments		25
Actuarial (gain) loss	(87)	327
Benefits paid	(165)	(167)
Benefit obligation at end of year	3,161	3,222	2,844
Change in plan assets
Fair value of plan assets at beginning of year	2,814	2,596
Actual (loss) gain on plan assets	(111)	287
Employer contributions	77	97
Plan participants’ contributions	1	1
Benefits paid	(165)	(167)
Fair value of plan assets at end of year	2,616	2,814	2,596
Funded status at end of year
Fair value of plan assets	2,814	2,814	2,596	2,616	2,814
Benefit obligations	(3,222)	(3,222)	(2,844)	(3,161)	(3,222)
Funded status of plans				(545)	(408)
Amounts recognized in the consolidated balance sheets consist of:
Current liability				(30)	(30)
Noncurrent liability				(515)	(378)
Recognized liability				(545)	(408)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss				305	278
Prior service cost (credit)				37	44
Amount recognized at end of year				342	322
Foreign Pension Plan [Member]
Change in benefit obligation
Benefit obligation at beginning of year	587	456
Service cost	26	27	10
Interest cost	18	23	16
Acquisitions		103
Actuarial (gain) loss	(8)	67
Other	(8)	(3)
Benefits paid	(23)	(40)
Foreign currency translation	(38)	(46)
Benefit obligation at end of year	554	587	456
Change in plan assets
Fair value of plan assets at beginning of year	449	300
Actual (loss) gain on plan assets	3	68
Employer contributions	39	50
Acquisitions		97
Benefits paid	(23)	(40)
Foreign currency translation	(26)	(26)
Fair value of plan assets at end of year	442	449	300
Funded status at end of year
Fair value of plan assets	449	449	300	442	449
Benefit obligations	$ (587)	$ (587)	$ (456)	(554)	(587)
Funded status of plans				(112)	(138)
Amounts recognized in the consolidated balance sheets consist of:
Noncurrent asset				50	47
Current liability				(5)	(11)
Noncurrent liability				(157)	(174)
Recognized liability				(112)	(138)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss				27	30
Prior service cost (credit)				(2)	(3)
Amount recognized at end of year				$ 25	$ 27