DEBT Narrative (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Apr. 01, 2016
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage rate range, maximum					9.38%		9.38%
Debt instrument, maturity date range, start					Jan. 01, 2018		Jan. 01, 2015
Extinguishment of debt, amount	[1]		$ 0		$ 1,172	$ 0	$ 1,389
Pension plan contributions						(250)	$ (750)
Debt instrument, interest rate, stated percentage rate range, minimum			4.70%				4.70%
Debt instrument, maturity date range, end					Jan. 01, 2030		Jan. 01, 2030
Gain (Loss) on Repurchase of Debt Instrument					$ (211)
Write off of deferred debt issuance cost			$ 0		$ 207	0	$ 208
Debt and capital lease obligations			9,400			9,400
Debt fair value			10,700			$ 10,700
Secured Debt [Member]
Debt Instrument [Line Items]
Proceeds from issuance of secured debt			$ 400	$ 400
Debt instrument, interest rate, stated percentage			1.21%	1.22%		1.21%
Repayments of secured debt			$ 365	$ 185
Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement			250			$ 250
Line of Credit [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount			$ 261
Debt Instrument, Maturity Date			Apr. 15, 2016
Line of credit facility, maximum borrowing capacity								$ 250
Line of credit facility, expiration date			Dec. 31, 2016
Line of credit facility, commitment fee percentage			0.15%
Proceeds from lines of credit			$ 230
Commercial Paper [Member]
Debt Instrument [Line Items]
Commercial Paper			50			50
Line of credit facility, maximum borrowing capacity			$ 750			$ 750
Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage rate range, maximum					9.38%
Debt instrument, maturity date range, start					Jan. 01, 2018
Debt instrument, interest rate, stated percentage rate range, minimum					4.75%
Debt instrument, maturity date range, end					Jan. 01, 2022
Three Point Eight Percentage Fixed Rate Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					3.80%		3.80%
Proceeds from Issuance of Debt					$ 700
Debt Instrument, Maturity Date					Jan. 15, 2026
Five Point Zero Percentage Fixed Rate Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					5.00%		5.00%
Proceeds from Issuance of Debt					$ 600
Debt Instrument, Maturity Date					Sep. 15, 2035
Five Point Zero Percentage Fixed Rate Loan [Member] [Member] [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					5.15%		5.15%
Proceeds from Issuance of Debt					$ 700
Debt Instrument, Maturity Date					May 15, 2046
Early Debt Extinguishment Costs [Member]
Debt Instrument [Line Items]
Write off of deferred debt issuance cost					$ 207
Subsequent Event [Member]
Debt Instrument [Line Items]
Subsequent Event, Date		Aug. 11, 2016
Subsequent Event [Member] | Three Point Zero Percentage Fixed Rate Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.00%
Proceeds from Issuance of Debt		$ 1,100
Debt Instrument, Maturity Date		Feb. 15, 2027
Subsequent Event [Member] | Four Point Four Percentage Fixed Rate Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		4.40%
Proceeds from Issuance of Debt		$ 1,200
Debt Instrument, Maturity Date		Aug. 15, 2047

[1] Reductions related to notes with interest rates ranging from 4.70% to 9.38% with original maturities from 2018 to 2030 for the three months ended June 30, 2015 and from 4.70% to 9.38% with original maturities from 2015 to 2030 for the six months ended June 30, 2015.