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Financial Instruments Energy (Details) (Energy Segment [Member], USD $)
In Millions, unless otherwise specified
2 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Jul. 01, 2012
Commodity contracts [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of open commodity positions, net liability $ 1 $ 1  
Swap [Member] | Commodity contracts [Member] | Not Designated as Hedging Instrument [Member]
     
Derivatives, Fair Value [Line Items]      
Barrels of crack spreads hedging margin on future gasoline and distillate production 13,500,000 13,500,000  
Other Income (Loss) [Member] | Commodity contracts [Member] | Not Designated as Hedging Instrument [Member]
     
Derivatives, Fair Value [Line Items]      
Realized loss on commodity derivatives 3    
Other Income (Loss) [Member] | Swap [Member] | Commodity contracts [Member] | Not Designated as Hedging Instrument [Member]
     
Derivatives, Fair Value [Line Items]      
Fair value of open commodity positions, net liability 1 1  
Realized loss on commodity derivatives (6)    
Cash Flow Hedging [Member] | Interest rate swap contracts [Member] | Designated as Hedging Instrument [Member]
     
Derivatives, Fair Value [Line Items]      
Notional value of interest rate swap agreements 63 63  
Lower fixed interest rate paid on interest rate swaps 1.94% 1.94% 1.975%
Frequency of interest rate swap settlements   90 days  
Average fixed interest rate paid on interest rate swaps 1.96% 1.96%  
Realized loss on interest rate swaps reclassified from AOCI into interest expense 0.1    
Debt Facility [Member] | Term Loan [Member]
     
Derivatives, Fair Value [Line Items]      
Balance of debt partially hedged $ 125 $ 125  
Effective interest rate on debt hedged 4.60% 4.60%