DEBT (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of long-term debt

Long-term debt consisted of the following as of the dates indicated:

	December 31,
	2019			2018
	(in millions)
4.625% Notes due 2021	$	399		$	400
7.320% Medium-term Notes, Series A, due 2022	21			20
2.875% Senior Notes due 2024	1,000			—
4.750% Senior Notes due 2024	—			1,250
5.375% Senior Notes due 2025	800			800
3.250% Senior Notes due 2026	800			—
7.350% Medium-term Notes, Series A, due 2027	11			10
7.125% Medium-term Notes, Series B, due 2028	108			100
3.500% Senior Notes due 2029	1,200			—
DrillCo Agreement	39			—
Unamortized debt issuance costs	(19		)	(27		)
Unamortized discount costs	(31		)	—
Unamortized premium costs	9			10
Revolving credit facility	13			1,490
Viper revolving credit facility	97			411
Viper 5.375% Senior Notes due 2027	500			—
Rattler revolving credit facility	424			—
Total long-term debt	$	5,371		$	4,464

Financial covenants

The Rattler credit agreement also contains financial maintenance covenants that require the maintenance of the financial ratios described below:

Financial Covenant	Required Ratio
Consolidated Total Leverage Ratio commencing with the fiscal quarter ending September 30, 2019	Not greater than 5.00 to 1.00 (or not greater than 5.50 to 1.00 for 3 fiscal quarters following certain acquisitions), but if the Consolidated Senior Secured Leverage Ratio (as defined in the Rattler credit agreement) is applicable, then not greater than 5.25 to 1.00)
Consolidated Senior Secured Leverage Ratio commencing with the last day of any fiscal quarter in which the Financial Covenant Election (as defined in the Rattler credit agreement) is made	Not greater than 3.50 to 1.00
Consolidated Interest Coverage Ratio (as defined in the Rattler credit agreement) commencing with the fiscal quarter ending September 30, 2019	Not less than 2.50 to 1.00

Financial Covenant	Required Ratio
Ratio of total net debt to EBITDAX, as defined in the Viper credit agreement	Not greater than 4.0 to 1.0
Ratio of current assets to liabilities, as defined the Viper credit agreement	Not less than 1.0 to 1.0

Schedule of interest expense

The following amounts have been incurred and charged to interest expense for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in millions)
Interest expense	$	235		$	110		$	61
Less capitalized interest	(66		)	(32		)	(22		)
Other fees and expenses	4			10			2
Total interest expense	$	173		$	88		$	41