Consolidated Statements of Cash Flows - WES Operating (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Borrowings, net of debt issuance costs	[1]	$ 4,169,695	$ 2,671,337	$ 468,803
Repayments of debt	[2]	1,467,595	1,040,000	0
WES Operating [Member]
Borrowings, net of debt issuance costs	[3]	4,169,695	2,671,344	468,803
Repayments of debt	[4]	1,439,595	1,040,000	$ 0
Affiliates [Member]
Borrowings, net of debt issuance costs		11,000	321,800
Repayments of debt		439,600
Affiliates [Member] | WES Operating [Member]
Borrowings, net of debt issuance costs		11,000	$ 321,800
Repayments of debt		$ 439,600

[1] For the years ended December 31, 2019 and 2018, includes $11.0 million and $321.8 million of borrowings, respectively, under the APCWH Note Payable.

[2] For the year ended December 31, 2019, includes a $439.6 million repayment to settle the APCWH Note Payable. See Note 6.

[3] For the years ended December 31, 2019 and 2018, includes $11.0 million and $321.8 million of borrowings, respectively, under the APCWH Note Payable.

[4] For the year ended December 31, 2019, includes a $439.6 million repayment to settle the APCWH Note Payable. See Note 6.