Annual report pursuant to Section 13 and 15(d)

Other Non-Current Assets - Equity Method Investments (Details)

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Other Non-Current Assets - Equity Method Investments (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
mi
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
May 31, 2018
USD ($)
Investment [Line Items]                        
Loss on equity method investments                 $ 87,000,000      
Equity method investment $ 108,000,000       $ 94,000,000       108,000,000 $ 94,000,000    
Other revenues 3,007,000,000 $ 2,170,000,000 $ 2,292,000,000 $ 2,261,000,000 2,383,000,000 $ 1,819,000,000 $ 1,543,000,000 $ 2,242,000,000 9,730,000,000 7,987,000,000 $ 5,601,000,000  
Accounts and other receivables 491,000,000       585,000,000       491,000,000 585,000,000    
Midship Holdings [Member]                        
Investment [Line Items]                        
Equity method investment 105,000,000       85,000,000       105,000,000 85,000,000    
O&M Services [Member] | Midship Pipeline [Member] | Service Agreements [Member]                        
Investment [Line Items]                        
Other revenues                 12,000,000 12,000,000 $ 3,000,000  
Accounts and other receivables 3,000,000       $ 4,000,000       $ 3,000,000 $ 4,000,000    
CCL [Member] | Midship Pipeline [Member] | Natural Gas Transportation Agreement [Member]                        
Investment [Line Items]                        
Long-term Purchase Commitment, Period                 10 years      
EIG Global Energy Partners [Member] | Maximum [Member]                        
Investment [Line Items]                        
Investment Company, Financial Commitment to Investee, Future Amount 500,000,000               $ 500,000,000      
Midship Pipeline [Member]                        
Investment [Line Items]                        
Length of Natural Gas Pipeline | mi                 200      
Midship Pipeline [Member] | CCL [Member] | Midship Pipeline Letter of Credit [Member]                        
Investment [Line Items]                        
Letter of Credit, Maximum Borrowing Capacity                       $ 16,000,000
Letters of credit, outstanding amount $ 0               $ 0