Note 15 - Shareholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance		$ (743)	$ (837)	$ (1,171)	$ (581)
Other comprehensive income (loss)		240	(62)	625	(236)
Equity method affiliates		(44)	22	(1)	(60)
Net current-period other comprehensive income		196	(40)	624	(296)
Balance		(547)	(877)	(547)	(877)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	[1]	(588)	(708)	(588)	(709)
Other comprehensive income (loss)	[1],[2]	(29)	(9)	(35)
Equity method affiliates	[1],[3]	265	6	264	(4)
Net current-period other comprehensive income	[1]	265	5	265	6
Balance	[1]	(323)	(703)	(323)	(703)
Amounts reclassified from accumulated other comprehensive income (2)	[1],[2]	29	$ 8	36	$ 10
Balance				(1,811)
Balance		$ (966)		$ (966)

[1] All amounts are after tax. Amounts in parentheses indicate debits to accumulated other comprehensive income.

[2] Tax effects are not significant.

[3] For the three and six months ended June 30, 2016, amounts are net of total tax expense of $(19) million. For the three and six months ended June 30, 2015, tax effects are not significant.