SUBSEQUENT EVENT (Details) - USD ($)	1 Months Ended
	Apr. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Debt face amount		$ 5,733,013,000	$ 4,693,675,000
Senior Notes
Subsequent Event [Line Items]
Debt face amount		16,239,245,000	16,289,245,000
Senior Notes 7.5% Notes due April 1, 2028 | Senior Notes | Subsequent Event
Subsequent Event [Line Items]
Debt face amount	$ 1,050,000,000
Stated interest rate	7.50%
6.375% Senior Notes due September 15, 2020 | Senior Notes
Subsequent Event [Line Items]
Debt face amount		$ 1,050,000,000	$ 1,050,000,000
Stated interest rate		6.375%
6.375% Senior Notes due September 15, 2020 | Senior Notes | Subsequent Event
Subsequent Event [Line Items]
Stated interest rate	6.375%
Extinguishment of debt	$ 1,050,000,000