Pension and Postretirement Expense Level 4 (Details) - Amounts Recognized (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Other assets, net $ 110 $ 134  
Other Liabilities, Current (135) (127)  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent (278) (234)  
Accumulated Other Comprehensive Income (Loss), Net of Tax 159 21 77
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]      
Net Accumulated Unrecognized Losses for U.S. Pension Plans 9    
Unrecognized Actuarial Losses for U.S. Plans 28    
Amortization of Actuarial Losses for U.S. Plans (8)    
Net Accumulated Unrecognized Losses for Non-U.S. Pension Plans 70    
Unrecognized Actuarial Losses for Non-U.S. Plans 75    
Amortization of Actuarial Losses for Non-U.S. Plans 3    
Amortization of Prior Service Cost for Non-U.S. Plans 2    
United States Pension Plans of US Entity, Defined Benefit [Member]      
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Other assets, net 0 0  
Other Liabilities, Current 1 0  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent (50) (38)  
Accumulated Other Comprehensive Income (Loss), Net of Tax 149 140  
Defined Benefit Plan, Amounts Recognized in Balance Sheet 98 102  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]      
Recognized actuarial loss 137 128  
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 2 2  
Deferred income taxes 10 10  
Net Amounts Recognized in Accumulated Other Comprehensive Income 149 140  
Defined Benefit Plan, Accumulated Benefit Obligation 281 278  
Accumulated Benefit Obligation for Funded Plans 279 276  
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation 281 278  
Pension Benefits Fair Value of Plan Assets of Underfunded Plans 230 240  
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]      
Aggregate Projected Benefit Obligation for Underfunded Pension Plans 281 278  
Aggregate Projected Benefit Obligation for Underfunded Pension Plans 281 278  
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans 230 240  
Actuarial Gain from Plan Amendment 0 0  
Foreign Pension Plans, Defined Benefit [Member]      
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Other assets, net 0 7  
Other Liabilities, Current (5) (5)  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent (208) (173)  
Accumulated Other Comprehensive Income (Loss), Net of Tax 129 59  
Defined Benefit Plan, Amounts Recognized in Balance Sheet (84) (112)  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]      
Recognized actuarial loss 140 66  
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) (5) (3)  
Deferred income taxes (6) (4)  
Net Amounts Recognized in Accumulated Other Comprehensive Income 129 59  
Defined Benefit Plan, Accumulated Benefit Obligation 518 436  
Accumulated Benefit Obligation for Funded Plans 342 270  
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation 201 181  
Pension Benefits Fair Value of Plan Assets of Underfunded Plans 23 13  
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]      
Aggregate Projected Benefit Obligation for Underfunded Pension Plans 215 189  
Aggregate Projected Benefit Obligation for Underfunded Pension Plans 563 199  
Aggregate Fair Value of Plan Assets for Underfunded Pension Plans 351 21  
Actuarial Gain from Plan Amendment (2) (6)  
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]      
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Other assets, net 0 0  
Other Liabilities, Current 0 0  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent (9) (12)  
Accumulated Other Comprehensive Income (Loss), Net of Tax (10) (10)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet (19) (22)  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]      
Recognized actuarial loss (7) (6)  
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 0 0  
Deferred income taxes (3) (4)  
Net Amounts Recognized in Accumulated Other Comprehensive Income (10) (10)  
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]      
Actuarial Gain from Plan Amendment 0 0  
Foreign Postretirement Benefit Plans, Defined Benefit [Member]      
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]      
Other assets, net 0 0  
Other Liabilities, Current 0 0  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent (11) (11)  
Accumulated Other Comprehensive Income (Loss), Net of Tax 2 2  
Defined Benefit Plan, Amounts Recognized in Balance Sheet (9) (9)  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]      
Recognized actuarial loss (1) (2)  
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) 4 6  
Deferred income taxes (1) 2  
Net Amounts Recognized in Accumulated Other Comprehensive Income 2 2  
Pension Plans with Underfunded Accumulated Benefit Obligations [Abstract]      
Actuarial Gain from Plan Amendment $ (1) $ 6