v2.4.0.8
Assets and Liabilities with Recurring Fair Value Measurements Fair Value Hierarchy (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 871 [1] $ 1,502 [1]
Margin deposits 276 [2] 196 [2]
Commodity futures contracts 595 385
Commodity forward contracts 134 [3] 48 [3]
Interest Rate Swap Assets, Fair Value Disclosure 8 4
Total assets 1,884 2,135
Margin deposits held by us posted by our counterparties 3 [2],[4] 11 [2],[4]
Commodity futures contracts 646 424
Commodity forward contracts 130 [3] 26 [3]
Interest rate swaps 145 200
Liabilities, Fair Value Disclosure 924 661
Fair Value, Inputs, Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 871 [1] 1,502 [1]
Margin deposits 276 196
Commodity futures contracts 595 385
Commodity forward contracts 0 [3] 0 [3]
Interest Rate Swap Assets, Fair Value Disclosure 0 0
Total assets 1,742 2,083
Margin deposits held by us posted by our counterparties 3 11
Commodity futures contracts 646 424
Commodity forward contracts 0 [3] 0 [3]
Interest rate swaps 0 0
Liabilities, Fair Value Disclosure 649 435
Fair Value, Inputs, Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 0 [1] 0 [1]
Margin deposits 0 0
Commodity futures contracts 0 0
Commodity forward contracts 112 [3] 24 [3]
Interest Rate Swap Assets, Fair Value Disclosure 8 4
Total assets 120 28
Margin deposits held by us posted by our counterparties 0 0
Commodity futures contracts 0 0
Commodity forward contracts 121 [3] 18 [3]
Interest rate swaps 145 200
Liabilities, Fair Value Disclosure 266 218
Fair Value, Inputs, Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 0 [1] 0 [1]
Margin deposits 0 0
Commodity futures contracts 0 0
Commodity forward contracts 22 [3] 24 [3]
Interest Rate Swap Assets, Fair Value Disclosure 0 0
Total assets 22 24
Margin deposits held by us posted by our counterparties 0 0
Commodity futures contracts 0 0
Commodity forward contracts 9 [3] 8 [3]
Interest rate swaps 0 0
Liabilities, Fair Value Disclosure $ 9 $ 8
[1] As of June 30, 2013 and December 31, 2012, we had cash equivalents of $699 million and $1,274 million included in cash and cash equivalents and $172 million and $228 million included in restricted cash, respectively.
[2] Balances are subject to master netting arrangements and presented on a gross basis on our Consolidated Condensed Balance Sheets. We do not offset fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement for financial statement presentation, and we do not offset amounts recognized for the right to reclaim, or the obligation to return, cash collateral with corresponding derivative instrument fair values. See Note 5 for further discussion of our derivative instruments subject to master netting arrangements.
[3] Includes OTC swaps and options.
[4] Included in other current liabilities on our Consolidated Condensed Balance Sheets.