FINANCING ARRANGEMENTS - Maturities and Weighted Average Stated Rate of Interest (Details) - USD ($)		1 Months Ended	6 Months Ended
	Aug. 15, 2017	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Mar. 21, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Weighted average effective interest rate (as a percent)			6.06%			5.75%
Repayments of long-term debt			$ 7,839,000,000	$ 1,273,000,000
Principal amount			6,310,000,000
Senior Secured Notes
Debt Instrument [Line Items]
Principal amount			3,250,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of long-term debt			350,000,000
Series A-3 And Series A-4 Tranche A Term Loan Facilities And Series D-2, Series C-2, And Series E-1 Tranche B Term Loan Facilities
Debt Instrument [Line Items]
Repayments of long-term debt			6,303,000,000
March 2017 Term Loan Payment
Debt Instrument [Line Items]
Principal reduction			86,000,000
Senior Unsecured Notes
Debt Instrument [Line Items]
Repayments of long-term debt		$ 1,132,000,000	1,100,000,000
Principal amount					$ 1,100,000,000
Senior Unsecured Notes | Subsequent Event | Forecast
Debt Instrument [Line Items]
Repayments of long-term debt	$ 500,000,000
Term Loan Facility
Debt Instrument [Line Items]
Principal amount			$ 3,060,000,000