PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans) (Details) - USD ($) $ in Millions			12 Months Ended
		Jun. 01, 2016	Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)			$ (24)
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance			25,652		$ 27,979
Service cost			463	[1]	484	$ 411
Interest cost			846	[1]	975	1,096
Plan participants' contributions			19		19
Plan amendments			0		30
Actuarial changes in assumptions and experience			1,967		(929)
Acquisition/divestiture/other activity (1)	[2]		3,201		(894)
Benefits paid			(1,324)		(1,289)
Currency impact			(506)		(723)
Termination benefits/curtailment cost/settlements (2)			(38)	[3]	0
Benefit Obligations, Ending Balance			30,280		25,652	27,979
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning balance			18,595
Actual return on plan assets			1,437		314
Currency impact			(404)		(488)
Employer contributions			629		844
Plan participants' contributions			19		19
Acquisition/divestiture/other activity	[4]		2,077
Acquisition/divestiture/other activity (3)	[4]				(255)
Benefits paid			(1,324)		(1,289)
Fair value of plan assets at end of year			21,208		18,774	19,629
Less: Fair value of assets due to Olin			0		(179)
Fair value of plan assets, ending balance			21,208		18,595
Funded status at end of year			(9,072)		(7,057)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets			292		317
Current liabilities			(74)		(64)
Noncurrent liabilities			(9,290)		(7,310)
Net amounts recognized in the consolidated balance sheets			(9,072)		(7,057)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)			11,379		10,012
Prior service credit			(304)		(328)
Pretax balance in AOCL at end of year			11,075		9,684
Defined Benefit Plan, Amortization of Net Gains (Losses)			(626)
Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance			1,597		1,707
Service cost			13	[1]	14	14
Interest cost			52	[1]	59	72
Plan participants' contributions			0		0
Plan amendments			0		0
Actuarial changes in assumptions and experience			13		11
Acquisition/divestiture/other activity (1)			313	[2]	0
Benefits paid			(154)		(172)
Currency impact			1		(22)
Termination benefits/curtailment cost/settlements (2)			0		0
Benefit Obligations, Ending Balance			1,835		1,597	1,707
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning balance			0
Actual return on plan assets			0		0
Currency impact			0		0
Employer contributions			0		0
Plan participants' contributions			0		0
Acquisition/divestiture/other activity (3)			0		0
Benefits paid			0		0
Fair value of plan assets at end of year			0		0	$ 0
Less: Fair value of assets due to Olin			0		0
Fair value of plan assets, ending balance			0		0
Funded status at end of year			(1,835)		(1,597)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets			0		0
Current liabilities			(158)		(146)
Noncurrent liabilities			(1,677)		(1,451)
Net amounts recognized in the consolidated balance sheets			(1,835)		(1,597)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)			(133)		(154)
Prior service credit			0		(3)
Pretax balance in AOCL at end of year			(133)		(157)
Defined Benefit Plan, Amortization of Net Gains (Losses)			6
Olin [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Acquisition/divestiture/other activity (3)			(184)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Defined Benefit Plan, Divestitures, Benefit Obligation					618
ANGUS Chemical Company [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Acquisition/divestiture/other activity (3)					(9)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Defined Benefit Plan, Divestitures, Benefit Obligation					34
Insurance Company[Member] [Domain] | Defined Benefit Pension Plans [Member]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Defined Benefit Plan, Settlements, Benefit Obligation			53		248
Defined Benefit Plan, Settlements, Plan Assets			55		$ 247
Dow Corning Corporation [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Acquisition/divestiture/other activity		$ 2,327	2,327
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Projected benefit obligations		3,252	3,252
Defined Benefit Plan, Curtailments			36
Dow Corning Corporation [Member] | Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Acquisition/divestiture/other activity		0
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Projected benefit obligations		$ 313	$ 313

[1] Includes net periodic benefit costs of $26 million for defined benefit pension plans and $8 million of other postretirement benefits for plans assumed from Dow Corning.

[2] The 2016 impact includes pension benefit obligations of $3,252 million and other postretirement benefit obligations of $313 million assumed with the ownership restructure of Dow Corning. The 2016 impact also includes the transfer of benefit obligations of $53 million in the U.S. through the purchase of annuity contracts from an insurance company. The 2015 impact includes the transfer of benefit obligations associated with the Reverse Morris Trust transaction with Olin of $618 million and the transfer of benefit obligations associated with the divestiture of ANGUS to Golden Gate Capital of $34 million. The 2015 impact also includes the transfer of benefit obligations of $248 million in the U.S. through the purchase of annuity contracts from an insurance company. See Notes 4, 5 and 6 for additional information.

[3] The 2016 impact primarily relates to the curtailment of benefits for certain participants of a U.S. Dow Corning plan of $36 million.

[4] 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.