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PENSION PLANS AND OTHER POST RETIREMENT BENEFITS (Fair Value of Level 3 Pension Plan Assets) (Details) - Defined Benefit Pension Plans [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning $ 3,543 $ 3,586
Fair Value of Plan Assets, Ending 3,173 3,543
Fair Value, Inputs, Level 3 [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 746 661
Relating to assets held during the period (37) (24)
Relating to assets sold during the period 61 35
Purchases, sales, and settlements (21) 77
Transfers into Level 3, net (1) (1)
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) (1) (2)
Fair Value of Plan Assets, Ending 747 746
Equity Securities [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 869  
Fair Value of Plan Assets, Ending 622 869
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 4 2
Relating to assets held during the period 2 (2)
Relating to assets sold during the period 0 0
Purchases, sales, and settlements 0 4
Transfers into Level 3, net (1) 0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 0 0
Fair Value of Plan Assets, Ending 5 4
Fixed Income Securities [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 1,708  
Fair Value of Plan Assets, Ending 1,552 1,708
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 33 14
Relating to assets held during the period (4) 0
Relating to assets sold during the period 1 0
Purchases, sales, and settlements 21 20
Transfers into Level 3, net 0 (1)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 0 0
Fair Value of Plan Assets, Ending 51 33
Alternative Investments [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 813  
Fair Value of Plan Assets, Ending 783 813
Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 687 623
Relating to assets held during the period (35) (22)
Relating to assets sold during the period 60 35
Purchases, sales, and settlements (42) 53
Transfers into Level 3, net 0 0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets (1) (2)
Fair Value of Plan Assets, Ending 669 687
Other Investment Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]    
Pension Plan, Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value of Plan Assets, Beginning 22 22
Relating to assets held during the period 0 0
Relating to assets sold during the period 0 0
Purchases, sales, and settlements 0 0
Transfers into Level 3, net 0 0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 0 0
Fair Value of Plan Assets, Ending $ 22 $ 22