v3.10.0.1
Revenue from Contract with Customers (Schedule of Prospective Adoption) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Item Effected [Line Items]        
Revenues $ 2,826,573 $ 2,507,661 $ 2,205,410  
Depreciation and amortization expense 265,077 196,630 178,142  
Property, plant and equipment 7,628,592 7,235,468    
Accumulated depreciation (1,830,411) (1,682,633)    
Net property, plant and equipment 5,798,181 5,552,835    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 1,076,306 1,082,511 931,255  
Deferred revenue 121,085 117,795    
Other noncurrent liabilities 82,240 30,350    
Limited partner unitholders 2,763,925 2,267,231    
Accounting Standards Update 2014-09 [Member]        
Item Effected [Line Items]        
Depreciation and amortization expense 265,077      
Property, plant and equipment 7,628,592     $ 7,243,984
Accumulated depreciation (1,830,411)     (1,682,958)
Net property, plant and equipment 5,798,181     5,561,026
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 1,076,306     1,083,013
Deferred revenue 121,085     115,894
Other noncurrent liabilities 82,240     34,969
Limited partner unitholders 2,763,925     2,273,206
Accounting Standards Update 2014-09 [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Item Effected [Line Items]        
Depreciation and amortization expense 264,733      
Property, plant and equipment 7,610,591 7,235,468    
Accumulated depreciation (1,829,742) (1,682,633)    
Net property, plant and equipment 5,780,849 5,552,835    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 1,075,805 1,082,511    
Deferred revenue 125,717 117,795    
Other noncurrent liabilities 72,922 30,350    
Limited partner unitholders 2,750,778 2,267,231    
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Item Effected [Line Items]        
Depreciation and amortization expense 344      
Property, plant and equipment 18,001     8,516
Accumulated depreciation (669)     (325)
Net property, plant and equipment 17,332     8,191
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 501     502
Deferred revenue (4,632)     (1,901)
Other noncurrent liabilities 9,318     4,619
Limited partner unitholders 13,147     $ 5,975
Service [Member]        
Item Effected [Line Items]        
Revenues 1,878,988 $ 1,731,775 $ 1,591,119  
Service [Member] | Accounting Standards Update 2014-09 [Member]        
Item Effected [Line Items]        
Revenues 1,878,988      
Service [Member] | Accounting Standards Update 2014-09 [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Item Effected [Line Items]        
Revenues 1,871,471      
Service [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Item Effected [Line Items]        
Revenues $ 7,517