XML 124 R107.htm IDEA: XBRL DOCUMENT v3.10.0.1
Risk Management Fair Value of Derivative Contracts (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Asset derivatives $ 551 $ 458
Liability derivatives (171) (172)
Energy Related Derivative    
Derivatives, Fair Value [Line Items]    
Asset derivatives 157 33
Liability derivatives (11) (59)
Interest rate contract    
Derivatives, Fair Value [Line Items]    
Asset derivatives 126 190
Liability derivatives (108) (50)
Currency Swap [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 191 160
Liability derivatives 0 0
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 529 450
Liability derivatives (166) (148)
Designated as Hedging Instrument [Member] | Energy Related Derivative    
Derivatives, Fair Value [Line Items]    
Asset derivatives 199 79
Liability derivatives (45) (77)
Designated as Hedging Instrument [Member] | Energy Related Derivative | Fair Value of Derivatives Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 135 65
Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives (45) (53)
Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 64 14
Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Noncurrent Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives 0 (24)
Designated as Hedging Instrument [Member] | Interest rate contract    
Derivatives, Fair Value [Line Items]    
Asset derivatives 133 205
Liability derivatives (115) (65)
Designated as Hedging Instrument [Member] | Interest rate contract | Fair Value of Derivatives Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 12 41
Designated as Hedging Instrument [Member] | Interest rate contract | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives (37) (3)
Designated as Hedging Instrument [Member] | Interest rate contract | Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 121 164
Designated as Hedging Instrument [Member] | Interest rate contract | Other Noncurrent Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives (78) (62)
Designated as Hedging Instrument [Member] | Currency Swap [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 197 166
Liability derivatives (6) (6)
Designated as Hedging Instrument [Member] | Currency Swap [Member] | Fair Value of Derivatives Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 91 0
Designated as Hedging Instrument [Member] | Currency Swap [Member] | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives (6) (6)
Designated as Hedging Instrument [Member] | Currency Swap [Member] | Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 106 166
Designated as Hedging Instrument [Member] | Currency Swap [Member] | Other Noncurrent Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives 0 0
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Fair Value of Derivatives Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 22 8
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives (5) (22)
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 0 0
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Other Noncurrent Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability derivatives 0 (2)
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]    
Derivatives, Fair Value [Line Items]    
Asset derivatives 22 8
Liability derivatives $ (5) $ (24)