FAIR VALUE MEASUREMENTS - Concentrations of Credit Risk (Details) - customer	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Concentrations of Credit Risk [Abstract]
Customer risk, number of customers	5	3	1
Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage			24.00%
Saudi Aramco [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage		19.00%
Saudi Aramco [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	32.00%	34.00%
Freeport-McMoRan [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	0.00%
Cobalt International [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	19.00%
Repsol [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	12.00%
ConocoPhillips [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage		13.00%
ConocoPhillips [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	8.00%	12.00%
Anadarko [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage		10.00%
Anadarko [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage		9.00%
Jack-ups [Member] | Saudi Aramco [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	20.00%
Jack-ups [Member] | ConocoPhillips [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	11.00%
Deepwater [Member] | Freeport-McMoRan [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	12.00%
Deepwater [Member] | Cobalt International [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	12.00%
Deepwater [Member] | Repsol [Member] | Customer Concentration Risk [Member] | Consolidated Revenues [Member]
Concentrations of Credit Risk [Abstract]
Customer concentration, percentage	12.00%