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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Basis of Fair Value Measurements of Pension Plan Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Divestitures, Plan Assets [1]   $ 255  
Fair value of plan assets $ 21,208 18,595  
Defined Benefit Plan, Fair Value of Plan Assets Subtotal 21,208 18,774 $ 19,629
Defined Benefit Plan, Assets Due to (from) Plan 0 (179)  
Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   4,864  
Defined Benefit Plan, Fair Value of Plan Assets Subtotal 5,220 5,043  
Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   9,851  
Defined Benefit Plan, Fair Value of Plan Assets Subtotal 11,726 9,851  
Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,262 3,880 3,725
Defined Benefit Plan, Fair Value of Plan Assets Subtotal 4,262 3,880  
Cash and Cash Equivalents [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 879 817  
Cash and Cash Equivalents [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 73 84  
Cash and Cash Equivalents [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 806 733  
Cash and Cash Equivalents [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Equity Securities [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8,131 7,370  
Equity Securities [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 5,126 4,890  
Equity Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,971 2,452  
Equity Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 34 28 32
U.S. Equity [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,626 [2] 3,084 [3]  
U.S. Equity [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,642 [2] 2,525 [3]  
U.S. Equity [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 983 [2] 558 [3]  
U.S. Equity [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 [2] 1 [3]  
Company common stock [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-U.S. Equity - Developed Countries [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,188 3,044  
Non-U.S. Equity - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,955 1,877  
Non-U.S. Equity - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,232 1,167  
Non-U.S. Equity - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 0  
Emerging Markets Equity [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,096 1,031  
Emerging Markets Equity [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 508 462  
Emerging Markets Equity [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 557 542  
Emerging Markets Equity [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 31 27  
Convertible Bonds [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 221 203  
Convertible Bonds [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 26  
Convertible Bonds [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 199 177  
Convertible Bonds [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1 0  
Equity Derivatives [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8  
Equity Derivatives [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Equity Derivatives [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   8  
Equity Derivatives [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0  
Fixed Income Securities [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7,521 6,235  
Fixed Income Securities [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 47  
Fixed Income Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7,023 5,895  
Fixed Income Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 498 293 311
US Treasury and Government [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,091 1,320  
US Treasury and Government [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
US Treasury and Government [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,091 1,320  
US Treasury and Government [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
U.S. agency and agency mortgage backed securities [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 309 279  
U.S. agency and agency mortgage backed securities [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
U.S. agency and agency mortgage backed securities [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 309 279  
U.S. agency and agency mortgage backed securities [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate Bonds - Investment Grade [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,562 1,527  
Corporate Bonds - Investment Grade [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Corporate Bonds - Investment Grade [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,562 1,527  
Corporate Bonds - Investment Grade [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-U.S. Governments - Developed Countries [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,135 1,161  
Non-U.S. Governments - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-U.S. Governments - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,135 1,161  
Non-U.S. Governments - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-U.S. Corporate Bonds - Developed Countries [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,176 917  
Non-U.S. Corporate Bonds - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Non-U.S. Corporate Bonds - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,176 917  
Non-U.S. Corporate Bonds - Developed Countries [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Emerging Market Debt [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 131 109  
Emerging Market Debt [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Emerging Market Debt [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 131 109  
Emerging Market Debt [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other Asset-backed Securities [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 97 89  
Other Asset-backed Securities [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other Asset-backed Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 95 88  
Other Asset-backed Securities [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2 1  
High Yield Bonds [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 203 229  
High Yield Bonds [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 47  
High Yield Bonds [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 190 166  
High Yield Bonds [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13 16  
Other Fixed Income Funds [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 834 571  
Other Fixed Income Funds [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other Fixed Income Funds [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 351 295  
Other Fixed Income Funds [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 483 276  
Fixed Income Derivatives [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (17) 33  
Fixed Income Derivatives [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Fixed Income Derivatives [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets (17) 33  
Fixed Income Derivatives [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Alternative Investments [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 4,403 4,064  
Alternative Investments [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 22  
Alternative Investments [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 747 521  
Alternative Investments [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,635 3,521 3,342
Real Estate [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,087 1,832  
Real Estate [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21 22  
Real Estate [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 24 38  
Real Estate [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2,042 1,772  
Private Equity Funds [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,054  
Private Equity Funds [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Private Equity Funds [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Private Equity Funds [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,128 1,054  
Absolute Return [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,188 1,178  
Absolute Return [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Absolute Return [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 723 483  
Absolute Return [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 465 695  
Other Investments [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 274 288  
Other Investments [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Other Investments [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 179 250  
Other Investments [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 95 38 $ 40
Less: Fair value of Pension plan assets due Olin [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Assets Due to (from) Plan   (179)  
Less: Fair value of Pension plan assets due Olin [Member] | Defined Benefit Pension Plans [Member] | Quoted Prices in Active Markets for Identical Items (Level 1) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Assets Due to (from) Plan [4]   (179)  
Less: Fair value of Pension plan assets due Olin [Member] | Defined Benefit Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Assets Due to (from) Plan   0  
Less: Fair value of Pension plan assets due Olin [Member] | Defined Benefit Pension Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Assets Due to (from) Plan   $ 0  
Olin [Member] | Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Divestitures, Plan Assets $ 184    
[1] The 2016 impact includes plan assets assumed with the ownership restructure of Dow Corning of $2,327 million. The 2016 impact also includes the purchase of annuity contracts of $55 million in the U.S. associated with the transfer of benefit obligations to an insurance company and the transfer of plan assets associated with the Reverse Morris Trust transaction with Olin of $184 million. The 2015 impact includes the transfer of plan assets associated with the divestiture of ANGUS to Golden Gate Capital of $9 million. The 2015 impact also includes the purchase of annuity contracts of $247 million in the U.S. associated with the transfer of benefit obligations to an insurance company.
[2] Includes no Company common stock.
[3] Includes no Company common stock.
[4] Pension plan assets were transferred to Olin in 2016. The final plan assets transferred totaled $184 million, which reflected return on plan assets and benefits paid to participants from the closing date of the Transaction with Olin to the date of transfer. See Note 6 for additional information.