DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Derivative Instruments (Detail) bbl in Thousands, MMBTU in Thousands, $ in Millions		12 Months Ended
	Jan. 01, 2018 $ / bbl bbl	Dec. 31, 2017 USD ($) MMBTU Counterparty $ / MMBTU $ / bbl bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative counterparties | Counterparty		14
Put Options | NYMEX WTI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative remaining unamortized premium paid | $		$ 9
Put Options | Dated Brent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative remaining unamortized premium paid | $		11
Put Options | Crude Oil
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative remaining unamortized premium paid | $		$ 9
Put Options | July - December 2018 | Crude Oil | NYMEX WTI | Subsequent Event
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl	5,520
Derivative, weighted average strike price (USD per bbl) | $ / bbl	53.00
Put Options | July - December 2018 | Crude Oil | Dated Brent | Subsequent Event
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl	5,520
Derivative, weighted average strike price (USD per bbl) | $ / bbl	58.00
Put Options | January—December 2018 | Crude Oil | Dated Brent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		3,650
Derivative, weighted average strike price (USD per bbl) | $ / bbl		50.00
Fixed-Price Swaps | January—June 2018 | Crude Oil | NYMEX WTI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		2,715
Derivative, weighted average fixed price (USD per MMBtu)		51.23
Fixed-Price Swaps | January—June 2018 | Crude Oil | Dated Brent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		2,172
Derivative, weighted average fixed price (USD per MMBtu)		54.57
Fixed-Price Swaps | January—June 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, weighted average fixed price (USD per MMBtu)		3.17
Derivative, nonmonetary notional amount, energy measure | MMBTU		22,625
Fixed-Price Swaps | January - March 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, weighted average fixed price (USD per MMBtu)		3.39
Derivative, nonmonetary notional amount, energy measure | MMBTU		13,500
Fixed-Price Swaps | April—June 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, weighted average fixed price (USD per MMBtu)		2.92
Derivative, nonmonetary notional amount, energy measure | MMBTU		16,835
Fixed-Price Swaps | July - December 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, weighted average fixed price (USD per MMBtu)		2.96
Derivative, nonmonetary notional amount, energy measure | MMBTU		33,580
Collars | January—June 2018 | Crude Oil | NYMEX WTI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		2,715
Derivative, weighted average floor price (USD per bbl)		45.00
Derivative, weighted average ceiling price (USD per bbl)		56.45
Collars | January—June 2018 | Crude Oil | Dated Brent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		2,172
Derivative, weighted average floor price (USD per bbl)		50.00
Derivative, weighted average ceiling price (USD per bbl)		58.77
Collars | January—December 2018 | Crude Oil | NYMEX WTI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		6,753
Derivative, weighted average floor price (USD per bbl)		45.00
Derivative, weighted average ceiling price (USD per bbl)		57.00
Call Options | Crude Oil
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative remaining unamortized premium paid | $		$ 10
Call Options | January—December 2018 | Crude Oil | NYMEX WTI
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, volume (bbl) | bbl		6,753
Derivative, weighted average strike price (USD per bbl) | $ / bbl		60.03
Finanical Basis Swaps | January - March 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		9,450
Weighted Average Price Differential		(0.43)
Finanical Basis Swaps | October - December 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		1,380
Weighted Average Price Differential		(0.51)
Finanical Basis Swaps | July - December 2018 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		33,120
Weighted Average Price Differential		(0.53)
Finanical Basis Swaps | January—March 2019 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		1,350
Weighted Average Price Differential		(0.54)
Finanical Basis Swaps | January—June 2019 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		32,580
Weighted Average Price Differential		(0.53)
Finanical Basis Swaps | January - December 2019 | Natural Gas | NYMEX Henry Hub
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU		14,600
Weighted Average Price Differential		(0.45)