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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 20,958 | $ 11,975
Accounts receivable, net | 835,121 | 818,958
Materials and supplies | 201,749 | 141,174
Natural gas and NGLs in storage | 304,926 | 296,667
Commodity imbalances | 25,267 | 29,050
Other current assets | 82,313 | 100,808
Total current assets | 1,470,334 | 1,398,632
Property, plant and equipment |  |
Property, plant and equipment | 22,051,492 | 18,030,963
Accumulated depreciation, depletion and amortization | 3,702,807 | 3,264,312
Net property, plant and equipment (Note D) | 18,348,685 | 14,766,651
Investments and other assets |  |
Investments in unconsolidated affiliates | 861,844 | 969,150
Goodwill and intangible assets (Note E) | 957,833 | 967,142
Other assets | 173,425 | 130,096
Total investments and other assets | 1,993,102 | 2,066,388
Total assets | 21,812,121 | 18,231,671
Current liabilities |  |
Current maturities of long-term debt (Note F) | 7,650 | 507,650
Short-term borrowings (Note F) | 220,000 | 0
Accounts payable | 1,209,900 | 1,116,337
Commodity imbalances | 104,480 | 110,197
Accrued interest | 190,750 | 161,377
Finance lease liability - current | 1,949 | 1,765
Other current liabilities | 285,569 | 211,110
Total current liabilities | 2,020,298 | 2,108,436
Long-term debt, excluding current maturities (Note F) | 12,479,757 | 8,873,334
Deferred credits and other liabilities |  |
Deferred income taxes (Note L) | 536,063 | 219,731
Finance lease liability (Note O) | 24,296 | 26,244
Other deferred credits | 525,756 | 424,383
Total deferred credits and other liabilities | 1,086,115 | 670,358
Commitments and contingencies (Note N) |  |
Equity (Note G) |  |
Preferred stock, $0.01 par value: authorized and issued 20,000 shares at December 31, 2019, and at December 31, 2018 | 0 | 0
Common stock, $0.01 par value: authorized 1,200,000,000 shares; issued 445,016,234 shares and outstanding 413,239,050 shares at December 31, 2019; issued 445,016,234 shares and outstanding 411,532,606 shares at December 31, 2018 | 4,450 | 4,450
Paid-in capital | 7,403,895 | 7,615,138
Accumulated other comprehensive loss (Note H) | (374,000) | (188,239)
Retained earnings | 0 | 0
Treasury stock, at cost: 31,777,184 shares at December 31, 2019, and 33,483,628 shares at December 31, 2018 | (808,394) | (851,806)
Total equity | 6,225,951 | 6,579,543
Total liabilities and equity | $ 21,812,121 | $ 18,231,671

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