Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Derivative Financial Instruments (Details)

v3.19.3.a.u2
Summary of Significant Accounting Policies - Derivative Financial Instruments (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Counterparty
Derivative Financial Instruments  
Number of counterparties | Counterparty 14
Fair value of commodity derivative contracts $ 746
Morgan Stanley  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 121
JP Morgan  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 134
Scotiabank  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 58
Citigroup  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 117
Wells Fargo  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 215
Canadian Imperial Bank of Commerce  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 44
BNP Paribas  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 21
PNC  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 29
SunTrust  
Derivative Financial Instruments  
Fair value of commodity derivative contracts 7
Natixis  
Derivative Financial Instruments  
Fair value of commodity derivative contracts $ 10