XML 103 R68.htm IDEA: XBRL DOCUMENT v3.10.0.1
REVENUES (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Retained earnings increase $ 0       $ 0       $ 0 $ 0    
Commodity sales                 11,395,642,000 9,862,652,000 $ 6,858,456,000  
Services                 1,197,554,000 2,311,255,000 2,062,478,000  
Cost of sales and fuel (exclusive of depreciation and operating costs)                 9,422,708,000 9,538,045,000 6,496,124,000  
Depreciation and amortization                 428,557,000 406,335,000 391,585,000  
Income taxes                 362,903,000 447,282,000 212,406,000  
Net income 292,888,000 $ 313,916,000 $ 282,179,000 $ 266,049,000 64,812,000 $ 166,531,000 $ 175,991,000 $ 186,185,000 1,155,032,000 593,519,000 743,499,000  
Net income attributable to noncontrolling interest                 3,329,000 205,678,000 391,460,000  
Net income attributable to ONEOK 292,888,000 $ 313,259,000 $ 281,048,000 $ 264,508,000 63,045,000 $ 165,742,000 $ 71,693,000 $ 87,361,000 1,151,703,000 387,841,000 $ 352,039,000  
Accounts receivable, net 818,958,000       1,202,951,000       818,958,000 1,202,951,000    
Natural gas and natural gas liquids in storage 296,667,000       342,293,000       296,667,000 342,293,000    
Other current assets 100,808,000       53,008,000       100,808,000 53,008,000    
Property, plant and equipment 18,030,963,000       15,559,667,000       18,030,963,000 15,559,667,000    
Accumulated depreciation and amortization 3,264,312,000       2,861,541,000       3,264,312,000 2,861,541,000    
Other assets 130,096,000       180,830,000       130,096,000 180,830,000    
Accounts payable 1,118,102,000       1,140,571,000       1,118,102,000 1,140,571,000    
Other current liabilities 211,110,000       179,971,000       211,110,000 179,971,000    
Deferred income taxes 219,731,000       52,697,000       219,731,000 52,697,000    
Other deferred credits 450,627,000       348,924,000       450,627,000 348,924,000    
Retained earnings/paid-in capital 7,615,138,000       6,588,878,000       7,615,138,000 6,588,878,000    
Contract with Customer, Asset and Liability [Abstract]                        
Accounts receivable, net 800,000,000       $ 1,200,000,000       800,000,000 $ 1,200,000,000    
Amounts invoiced in excess of revenue recognized (900,000.0)               (900,000.0)      
Net additions 700,000.0               700,000.0      
Contract with customer, asset 6,200,000               6,200,000     $ 6,400,000
Contract with customer, asset, net, current 1,700,000               1,700,000     900,000
Contract with customer, asset, net, noncurrent 4,500,000               4,500,000      
Revenue recognized included in beginning balance                 (19,500,000.0)      
Net additions 17,900,000.0               17,900,000.0      
Contract with customer, liability 31,700,000.0               31,700,000.0     33,300,000.0
Contract with customer, liability, current 15,600,000               15,600,000     19,500,000
Contract with customer, liability, noncurrent 16,100,000               16,100,000      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation 1,891,800,000               1,891,800,000      
Calculated under Revenue Guidance in Effect before Topic 606 [Member]                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Commodity sales                 11,460,913,000      
Services                 2,712,256,000      
Cost of sales and fuel (exclusive of depreciation and operating costs)                 11,006,278,000      
Depreciation and amortization                 427,976,000      
Income taxes                 362,210,000      
Net income                 1,152,709,000      
Net income attributable to noncontrolling interest                 3,322,000      
Net income attributable to ONEOK                 1,149,387,000      
Accounts receivable, net 956,523,000               956,523,000      
Natural gas and natural gas liquids in storage 301,555,000               301,555,000      
Other current assets 99,579,000               99,579,000      
Property, plant and equipment 18,006,653,000               18,006,653,000      
Accumulated depreciation and amortization 3,262,359,000               3,262,359,000      
Other assets 125,606,000               125,606,000      
Accounts payable 1,255,667,000               1,255,667,000      
Other current liabilities 209,258,000               209,258,000      
Deferred income taxes 218,536,000               218,536,000      
Other deferred credits 434,508,000               434,508,000      
Retained earnings/paid-in capital 7,611,116,000               7,611,116,000      
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Commodity sales                 (65,271,000)      
Services                 (1,514,702,000)      
Cost of sales and fuel (exclusive of depreciation and operating costs)                 (1,583,570,000)      
Depreciation and amortization                 581,000      
Income taxes                 693,000      
Net income                 2,323,000      
Net income attributable to noncontrolling interest                 7,000      
Net income attributable to ONEOK                 2,316,000      
Accounts receivable, net (137,565,000)               (137,565,000)      
Natural gas and natural gas liquids in storage (4,888,000)               (4,888,000)      
Other current assets 1,229,000               1,229,000      
Property, plant and equipment 24,310,000               24,310,000      
Accumulated depreciation and amortization 1,953,000               1,953,000      
Other assets 4,490,000               4,490,000      
Accounts payable (137,565,000)               (137,565,000)      
Other current liabilities 1,852,000               1,852,000      
Deferred income taxes 1,195,000               1,195,000      
Other deferred credits 16,119,000               16,119,000      
Retained earnings/paid-in capital 4,022,000               4,022,000      
2019 [Member]                        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation 308,600,000               308,600,000      
2020 [Member]                        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation 256,100,000               256,100,000      
2021 [Member]                        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation 242,400,000               242,400,000      
2022 [Member]                        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation 192,700,000               192,700,000      
Thereafter [Member]                        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]                        
Revenue, Remaining Performance Obligation $ 892,000,000               $ 892,000,000      
Retained Earnings                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Retained earnings increase                       $ 1,700,000