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DEBT - Additional Information (Details) - USD ($)				9 Months Ended
DEBT - Additional Information (Details) - USD ($)	Sep. 30, 2020	Jun. 30, 2020	May 22, 2020	Sep. 30, 2020	Dec. 31, 2019	Oct. 01, 2019	Dec. 31, 2017
Debt Disclosure [Line Items]
Debt, stated interest rate		6.125%
Proceeds from issuance debt		$ 493,000,000
Principal amount	$ 2,717,000,000			$ 2,717,000,000
Debt instrument, convertible, remaining discount amortization period	2 years
Senior Secured Notes \| Senior notes
Debt Disclosure [Line Items]
Principal amount		$ 500,000,000
Senior Unsecured Notes \| Senior notes
Debt Disclosure [Line Items]
Principal amount	$ 750,000,000			$ 750,000,000
Debt, stated interest rate	6.50%			6.50%
2028 Notes \| Senior notes
Debt Disclosure [Line Items]
Principal amount						$ 350,000,000
Debt, stated interest rate						4.75%
Principal amount	$ 350,000,000			$ 350,000,000	$ 350,000,000
Revolving Corporate Credit Facility, net \| Corporate credit facility
Debt Disclosure [Line Items]
Principal amount	0			0	30,000,000
Convertible Notes, net \| Convertible notes
Debt Disclosure [Line Items]
Principal amount							$ 230,000,000
Debt, stated interest rate							1.50%
Principal amount	$ 230,000,000			$ 230,000,000	230,000,000
Interest rate, effective percentage	4.70%			4.70%
Term Loan \| Corporate credit facility
Debt Disclosure [Line Items]
Credit facility	$ 900,000,000			$ 900,000,000
Principal amount	887,000,000			887,000,000	$ 893,000,000
Revolving corporate credit facility, net \| Corporate credit facility
Debt Disclosure [Line Items]
Credit facility	600,000,000			600,000,000
Debt Instrument, Covenant, Liquidity Threshold			$ 300,000,000
Revolving corporate credit facility, net \| Letter of credit \| Corporate credit facility
Debt Disclosure [Line Items]
Credit facility	$ 75,000,000			$ 75,000,000
Convertible Note Hedges
Debt Disclosure [Line Items]
Option indexed to issuer's equity, indexed shares (in shares)							1,550,000
Convertible note hedges exercised (in shares)	0			0
Private Warrants
Debt Disclosure [Line Items]
Number of securities called by warrants (in shares)							1,550,000
Number of warrants exercised (in shares)	0			0
Exercise price of warrants (in usd per share)							$ 176.68
Minimum \| Revolving corporate credit facility, net \| Corporate credit facility
Debt Disclosure [Line Items]
Basis spread on variable rate				0.50%
Commitment fee percentage				0.20%
Maximum \| Revolving corporate credit facility, net \| Corporate credit facility
Debt Disclosure [Line Items]
Basis spread on variable rate				2.75%
Commitment fee percentage				0.40%
London Interbank Offered Rate (LIBOR) \| Term Loan \| Corporate credit facility
Debt Disclosure [Line Items]
Basis spread on variable rate				1.75%
Interest Rate Swap, September 2023
Debt Disclosure [Line Items]
Notional amount	$ 250,000,000			$ 250,000,000
Derivative, fixed interest rate	2.9625%			2.9625%
Interest Rate Swap, April 2024
Debt Disclosure [Line Items]
Notional amount	$ 200,000,000			$ 200,000,000
Derivative, fixed interest rate	2.248%			2.248%
Interest Rate Contract
Debt Disclosure [Line Items]
Notional amount	$ 100,000,000			$ 100,000,000
Cap strike rate	2.50%			2.50%
Floor strike rate	1.881%			1.881%