Note 16 - Fair Value Measurement of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Major US Plans [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	$ 3,653	$ 3,793
Major US Plans [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets		7
Major US Plans [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	373	382
Major US Plans [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	46	58	$ 69
Major US Plans [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	3,234	3,346
Major US Plans [Member] | Cash and Cash Equivalents [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	107	34
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	1	2
Major US Plans [Member] | Cash and Cash Equivalents [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	106	32
Major US Plans [Member] | Equity Securities [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	582	571
Major US Plans [Member] | Equity Securities [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	582	571
Major US Plans [Member] | Government Bonds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	849	924
Major US Plans [Member] | Government Bonds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	849	924
Major US Plans [Member] | Investment Grade Bonds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	373	382
Major US Plans [Member] | Investment Grade Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	373	382
Major US Plans [Member] | Real Estate [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	116	130
Major US Plans [Member] | Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	32	34	41
Major US Plans [Member] | Real Estate [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	84	96
Major US Plans [Member] | Global Balanced Asset Allocation Funds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	511	492
Major US Plans [Member] | Global Balanced Asset Allocation Funds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	511	492
Major US Plans [Member] | Absolute Return [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	457	487
Major US Plans [Member] | Absolute Return [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	457	487
Major US Plans [Member] | Private Equity Funds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	659	768
Major US Plans [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	14	24	$ 28
Major US Plans [Member] | Private Equity Funds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	645	744
Major US Plans [Member] | Derivatives with Unrealized Gains [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	(1)	5
Major US Plans [Member] | Derivatives with Unrealized Gains [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	(1)	5
Major Non-U.S. Plans [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	693	728
Major Non-U.S. Plans [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets		5
Major Non-U.S. Plans [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	428	407
Major Non-U.S. Plans [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	265	316
Major Non-U.S. Plans [Member] | Cash and Cash Equivalents [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	12	21
Major Non-U.S. Plans [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	3	5
Major Non-U.S. Plans [Member] | Cash and Cash Equivalents [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	9	16
Major Non-U.S. Plans [Member] | Equity Securities [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	18	22
Major Non-U.S. Plans [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	7	6
Major Non-U.S. Plans [Member] | Equity Securities [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	11	16
Major Non-U.S. Plans [Member] | Government Bonds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	102	156
Major Non-U.S. Plans [Member] | Government Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	16	39
Major Non-U.S. Plans [Member] | Government Bonds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	86	117
Major Non-U.S. Plans [Member] | Investment Grade Bonds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	110	90
Major Non-U.S. Plans [Member] | Investment Grade Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	59	45
Major Non-U.S. Plans [Member] | Investment Grade Bonds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	51	45
Major Non-U.S. Plans [Member] | Real Estate [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	3	2
Major Non-U.S. Plans [Member] | Real Estate [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	3	2
Major Non-U.S. Plans [Member] | Global Balanced Asset Allocation Funds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	29	47
Major Non-U.S. Plans [Member] | Global Balanced Asset Allocation Funds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	29	47
Major Non-U.S. Plans [Member] | Absolute Return [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	10	12
Major Non-U.S. Plans [Member] | Absolute Return [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	2	4
Major Non-U.S. Plans [Member] | Absolute Return [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	8	8
Major Non-U.S. Plans [Member] | Private Equity Funds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	57	61
Major Non-U.S. Plans [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	2
Major Non-U.S. Plans [Member] | Private Equity Funds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	55	61
Major Non-U.S. Plans [Member] | Derivatives with Unrealized Gains [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets		2
Major Non-U.S. Plans [Member] | Derivatives with Unrealized Gains [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets		2
Major Non-U.S. Plans [Member] | Inflation Linked Bonds [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	5	3
Major Non-U.S. Plans [Member] | Inflation Linked Bonds [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	5	3
Major Non-U.S. Plans [Member] | Global High Yield and Emerging Market Debt [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	15	3
Major Non-U.S. Plans [Member] | Global High Yield and Emerging Market Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	4
Major Non-U.S. Plans [Member] | Global High Yield and Emerging Market Debt [Member] | Measured at NAV [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	11	3
Major Non-U.S. Plans [Member] | Insurance Contracts [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	335	311
Major Non-U.S. Plans [Member] | Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	335	311
Major Non-U.S. Plans [Member] | Derivatives with Unrealized Losses [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	(3)	(2)
Major Non-U.S. Plans [Member] | Derivatives with Unrealized Losses [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement Of Plan Assets [Line Items]
Fair Value of Plan Assets	$ (3)	$ (2)