FINANCING ARRANGEMENTS - Senior Secured Credit Facilities (Details) - USD ($)							1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 03, 2017	Mar. 28, 2017	Mar. 21, 2017	Mar. 03, 2017	Aug. 23, 2016	Apr. 11, 2016	Apr. 30, 2017	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 20, 2017	Jan. 01, 2016
Debt Instrument [Line Items]
Repayments of long-term debt											$ 7,839,000,000	$ 1,273,000,000
Loss on extinguishment of debt									$ 0	$ 0	$ 64,000,000	$ 0
Amended Credit Agreement
Debt Instrument [Line Items]
Interest rate increase (decrease)						1.00%
Extraordinary, unusual or nonrecurring expenses permitted to be added back to EBITDA			$ 500,000,000
Costs, fees and expenses permitted to be added back to earnings before EBITDA			250,000,000
August 2016 Credit Facility Amendment
Debt Instrument [Line Items]
Interest rate increase (decrease)					0.50%
Senior Secured Credit Facilities
Debt Instrument [Line Items]
Repayments of long-term debt				$ 1,086,000,000
Senior Secured Credit Facilities | Federal Funds
Debt Instrument [Line Items]
Variable rate (as a percentage)											0.50%
Series F Tranche B Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 3,060,000,000
Repayments of long-term debt							$ 220,000,000
Quarterly amortization rate (as a percent)			1.25%										0.25%
Annual amortization rate (as a percent)			5.00%										1.00%
Stated interest rate on debt (as a percent)									5.83%		5.83%
Loss on extinguishment of debt			$ 27,000,000
Debt issuance costs			39,000,000
Debt modification costs			$ 3,000,000
Series F Tranche B Term Loan Facility | Base Rate
Debt Instrument [Line Items]
Variable rate (as a percentage)											3.75%
Series F Tranche B Term Loan Facility | LIBOR
Debt Instrument [Line Items]
Variable rate (as a percentage)											4.75%
Variable rate floor (as a percentage)											0.75%
Senior Unsecured Notes
Debt Instrument [Line Items]
Repayments of long-term debt								$ 1,132,000,000			$ 1,100,000,000
Stated interest rate on debt (as a percent)			6.75%
Loss on extinguishment of debt								$ 36,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,190,000,000												$ 1,500,000,000
Repayments of long-term debt											$ 350,000,000
Stated interest rate on debt (as a percent)									4.98%		4.98%
Repayments of Revolving Credit Facility			$ 350,000,000
Loss on extinguishment of debt		$ 1,000,000
Maturity date extension period		91 days
Other indebtedness for borrowed money threshold		$ 750,000,000
Amount to mature unless terminated		$ 310,000,000
Commitment fee (as a percent)											0.50%
Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Variable rate (as a percentage)											2.75%
Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Variable rate (as a percentage)											3.75%
March 31, 2017 To March 31, 2019
Debt Instrument [Line Items]
Interest coverage ratio			1.50
Secured leverage ratio			3.00
April 1, 2019 And Thereafter
Debt Instrument [Line Items]
Interest coverage ratio			1.75
Secured leverage ratio			2.75
Subsequent Event | Series F Tranche B Term Loan Facility
Debt Instrument [Line Items]
Repayments of long-term debt	$ 811,000,000