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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 15,295 $ 37,193
Accounts receivable, net 934,664 1,202,951
Materials and supplies 113,831 90,301
Natural gas and natural gas liquids in storage 285,776 342,293
Commodity imbalances 26,835 38,712
Other current assets 57,286 53,008
Total current assets 1,433,687 1,764,458
Property, plant and equipment    
Property, plant and equipment 16,363,716 15,559,667
Accumulated depreciation and amortization 3,059,799 2,861,541
Net property, plant and equipment 13,303,917 12,698,126
Investments and other assets    
Investments in unconsolidated affiliates 986,979 1,003,156
Goodwill and intangible assets 987,510 993,460
Deferred income taxes 31,503 205,907
Other assets 170,124 180,830
Total investments and other assets 2,176,116 2,383,353
Total assets 16,913,720 16,845,937
Current liabilities    
Current maturities of long-term debt (Note D) 932,650 432,650
Short-term borrowings (Note D) 156,000 614,673
Accounts payable 1,027,467 1,140,571
Commodity imbalances 136,411 164,161
Accrued interest 135,426 135,309
Other current liabilities 184,127 179,971
Total current liabilities 2,572,081 2,667,335
Long-term debt, excluding current maturities (Note D) 7,091,246 8,091,629
Deferred income taxes 54,726 52,697
Other deferred credits 357,184 348,924
Total deferred credits and other liabilities 411,910 401,621
Commitments and contingencies (Note J)
Equity (Note E)    
Preferred stock, $0.01 par value: issued 20,000 shares at June 30, 2018, and December 31, 2017 0 0
Common stock, $0.01 par value: authorized 1,200,000,000 shares, issued 445,016,234 shares and outstanding 411,173,760 shares at June 30, 2018; issued 423,166,234 shares and outstanding 388,703,543 shares at December 31, 2017 4,450 4,232
Paid-in Capital 7,699,934 6,588,878
Accumulated other comprehensive loss (Note F) (178,589) (188,530)
Retained Earnings 0 0
Treasury stock, at cost: 33,842,474 shares at June 30, 2018, and 34,462,691 shares at December 31, 2017 (860,935) (876,713)
Total ONEOK Shareholders' Equity 6,664,860 5,527,867
Noncontrolling interests in consolidated subsidiaries 173,623 157,485
Total equity 6,838,483 5,685,352
Total liabilities and equity $ 16,913,720 $ 16,845,937