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Note 16 - Fair Value Measurement of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Major US Plans [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets $ 3,793 $ 4,160  
Major US Plans [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 7 51  
Major US Plans [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 382 442  
Major US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 58 69  
Major US Plans [Member] | Measured at NAV [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 3,346 3,598  
Major US Plans [Member] | Cash and Cash Equivalents [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 34 115  
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 2 1  
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 32 114  
Major US Plans [Member] | Equity Securities [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 571 632  
Major US Plans [Member] | Equity Securities [Member] | Measured at NAV [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 571 632  
Major US Plans [Member] | Government Bonds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 924 989  
Major US Plans [Member] | Government Bonds [Member] | Measured at NAV [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 924 989  
Major US Plans [Member] | Investment Grade Bonds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 382 442  
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 382 442  
Major US Plans [Member] | Real Estate [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 130 139  
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 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 96 98  
Major US Plans [Member] | Global Balanced Asset Allocation Funds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 492 587  
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 492 587  
Major US Plans [Member] | Absolute Return [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 487 426  
Major US Plans [Member] | Absolute Return [Member] | Measured at NAV [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 487 426  
Major US Plans [Member] | Private Equity Funds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 768 780  
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 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 744 752  
Major US Plans [Member] | Derivatives with Unrealized Gains [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 5 50  
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 5 50  
Major Non-U.S. Plans [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 728 795  
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 7  
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 407 431  
Major Non-U.S. Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets   69 $ 101
Major Non-U.S. Plans [Member] | Measured at NAV [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 316 357  
Major Non-U.S. Plans [Member] | Cash and Cash Equivalents [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 21 36  
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 5 4  
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 16 32  
Major Non-U.S. Plans [Member] | Equity Securities [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 22 46  
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 6 8  
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 16 38  
Major Non-U.S. Plans [Member] | Government Bonds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 156 153  
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 39 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 117 114  
Major Non-U.S. Plans [Member] | Investment Grade Bonds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 90 37  
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 45 37  
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 45    
Major Non-U.S. Plans [Member] | Real Estate [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 2 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 2 2  
Major Non-U.S. Plans [Member] | Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets   41 47
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 47 91  
Major Non-U.S. Plans [Member] | Global Balanced Asset Allocation Funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets   1  
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 47 90  
Major Non-U.S. Plans [Member] | Absolute Return [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 12 11  
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 4 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 7  
Major Non-U.S. Plans [Member] | Private Equity Funds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 61 56  
Major Non-U.S. 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   28 $ 54
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 61 56  
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 5  
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 5  
Major Non-U.S. Plans [Member] | Inflation Linked Bonds [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 3 9  
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 3 9  
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 3 11  
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 3 11  
Major Non-U.S. Plans [Member] | Insurance Contracts [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets 311 340  
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 311 340  
Major Non-U.S. Plans [Member] | Derivatives with Unrealized Losses [Member]      
Fair Value Measurement Of Plan Assets [Line Items]      
Fair Value of Plan Assets (2) (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 $ (2) $ (2)