CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 447,129	$ 20,958
Accounts receivable, net	717,852	835,121
Materials and supplies	158,950	201,749
NGLs and natural gas in storage	300,577	304,926
Commodity imbalances	13,289	25,267
Other current assets	83,565	82,313
Total current assets	1,721,362	1,470,334
Property, plant and equipment
Property, plant and equipment	22,803,167	22,051,492
Accumulated depreciation and amortization	3,773,852	3,702,807
Net property, plant and equipment	19,029,315	18,348,685
Investments and other assets
Investments in unconsolidated affiliates (Note A)	790,373	861,844
Goodwill and intangible assets (Note A)	776,330	957,833
Other assets	463,496	173,425
Total investments and other assets	2,030,199	1,993,102
Total assets	22,780,876	21,812,121
Current liabilities
Current maturities of long-term debt (Note D)	7,650	7,650
Short-term borrowings (Note D)	0	220,000
Accounts payable	624,483	1,209,900
Commodity imbalances	125,955	104,480
Accrued taxes	103,778	75,422
Accrued interest	140,506	190,750
Operating lease liability, current	13,646	1,883
Other current liabilities	78,124	210,213
Total current liabilities	1,094,142	2,020,298
Long-term debt, excluding current maturities (Note D)	14,249,339	12,479,757
Deferred credits and other liabilities
Deferred income taxes	582,334	536,063
Operating lease liability, noncurrent	90,806	13,509
Other deferred credits	618,143	536,543
Total deferred credits and other liabilities	1,291,283	1,086,115
Commitments and contingencies (Note J)
Equity (Note E)
Preferred stock, $0.01 par value: authorized and issued 20,000 shares at September 30, 2020, and December 31, 2019	0	0
Common stock, $0.01 par value: authorized 1,200,000,000 shares, issued 474,916,234 shares and outstanding 444,392,615 shares at September 30, 2020; issued 445,016,234 shares and outstanding 413,239,050 shares at December 31, 2019	4,749	4,450
Paid-in capital	7,448,484	7,403,895
Accumulated other comprehensive loss (Note F)	(530,618)	(374,000)
Retained earnings	0	0
Treasury stock, at cost: 30,523,619 shares at September 30, 2020, and 31,777,184 shares at December 31, 2019	(776,503)	(808,394)
Total equity	6,146,112	6,225,951
Total liabilities and equity	$ 22,780,876	$ 21,812,121