Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents		$ 152,282	$ 99,962
Accounts receivable, net	[1]	257,239	260,512
Other current assets	[2]	81,027	41,938
Total current assets		490,548	402,412
Property, plant, and equipment
Cost		12,545,357	12,355,671
Less accumulated depreciation		3,558,626	3,290,740
Net property, plant, and equipment		8,986,731	9,064,931
Goodwill		4,783	445,800
Other intangible assets		800,482	809,391
Equity investments		1,292,104	1,285,717
Other assets	[3]	76,465	78,202
Total assets		11,908,998	12,346,453
Current liabilities
Accounts and imbalance payables		219,628	293,128
Short-term debt	[4]	11,184	7,873
Accrued ad valorem taxes		52,175	35,160
Accrued liabilities	[5]	166,738	149,793
Total current liabilities		449,725	485,954
Long-term liabilities
Long-term debt		8,088,761	7,951,565
Deferred income taxes		16,731	18,899
Asset retirement obligations		339,454	336,396
Other liabilities	[6]	222,042	208,346
Total long-term liabilities		8,666,988	8,515,206
Total liabilities		9,116,713	9,001,160
Equity and partners' capital
Common units (443,971,409 units issued and outstanding at March 31, 2020, and December 31, 2019)		2,684,136	3,209,947
General partner units (9,060,641 units issued and outstanding at March 31, 2020, and December 31, 2019)	[7]	(24,990)	(14,224)
Total partners' capital		2,659,146	3,195,723
Noncontrolling interests		133,139	149,570
Total equity and partners' capital		2,792,285	3,345,293
Total liabilities, equity, and partners' capital		11,908,998	12,346,453
Affiliates [Member]
Current assets
Accounts receivable, net		124,900	113,300
Other current assets		9,000	5,000
Note receivable - Anadarko	[8]	257,885	260,000
Property, plant, and equipment
Other assets		59,700	60,200
Current liabilities
Accrued liabilities		2,500	3,100
Long-term liabilities
Other liabilities		$ 107,800	$ 97,800

[1] Accounts receivable, net includes amounts receivable from related parties (as defined in Note 1) of $124.9 million and $113.3 million as of March 31, 2020, and December 31, 2019, respectively.

[2] Other current assets includes related-party amounts of $9.0 million and $5.0 million as of March 31, 2020, and December 31, 2019, respectively.

[3] Other assets includes related-party amounts of $59.7 million and $60.2 million as of March 31, 2020, and December 31, 2019, respectively. Other assets also includes $2.0 million and $4.5 million of NGLs line fill as of March 31, 2020, and December 31, 2019, respectively.

[4] Short-term debt includes related-party amounts for finance leases of $2.6 million and $7.9 million as of March 31, 2020, and December 31, 2019, respectively.

[5] Accrued liabilities includes related-party amounts of $2.5 million and $3.1 million as of March 31, 2020, and December 31, 2019, respectively.

[6] Other liabilities includes related-party amounts of $107.8 million and $97.8 million as of March 31, 2020, and December 31, 2019, respectively.

[7] See Note 1.

[8] Note receivable – Anadarko is presented net of a $2.1 million allowance for expected credit losses as of March 31, 2020. See Note 1.