CONSOLIDATED BALANCE SHEETS - USD ($)		Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents		$ 449,935,000	$ 0
Revenue receivables (Note 3)		10,914,000	5,422,000
Inventories and other		5,802,000	743,000
Prepaid assets and other		1,379,000	0
Total current assets		468,030,000	6,165,000
PROPERTY, PLANT AND EQUIPMENT:
Gathering, processing and transmission facilities		1,251,217,000	705,166,000
Less: Accumulated depreciation and amortization		(24,320,000)	(5,580,000)
Total property, plant and equipment, net		1,226,897,000	699,586,000
OTHER ASSETS:
Joint venture equity interest		91,100,000	0
Deferred tax asset		67,558,000	0
Deferred charges and other		3,734,000	0
Other assets		162,392,000	0
Total assets		1,857,319,000	705,751,000
CURRENT LIABILITIES:
Accounts payable to Apache Corporation (Note 1)		13,595,000	0
Other current liabilities (Note 6)		84,926,000	124,471,000
Total current liabilities		98,521,000	124,471,000
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Asset retirement obligation		29,369,000	18,189,000
Deferred tax liability		2,643,000	7,041,000
Other Liabilities, Noncurrent		32,012,000	25,230,000
Total liabilities		130,533,000	149,701,000
COMMITMENTS AND CONTINGENCIES (Note 8)
Redeemable noncontrolling interest		1,940,500,000	0
EQUITY:
Additional paid-in capital		0	574,611,000
Accumulated deficit		(213,746,000)	(18,575,000)
Total equity		(213,714,000)	556,050,000
Total liabilities, noncontrolling interest, and equity		1,857,319,000	705,751,000
Class A Common Stock
EQUITY:
Common stock	[1]	7,000	0
Class C Common Stock
EQUITY:
Common stock	[1]	$ 25,000	$ 14,000

[1] For periods prior to the Business Combination, the number of shares has been retroactively restated to reflect the number of shares received by Apache. For further detail of the Business Combination and associated financial statement presentation, please refer to Note 1 — Summary of Significant Accounting Policies and Note 2 — Recapitalization Transaction.