Financial Instruments Energy (Details) (USD $) In Millions, unless otherwise specified	8 Months Ended		12 Months Ended
	Dec. 31, 2012		Dec. 31, 2013		Jul. 01, 2011	Jun. 30, 2011
Commodity contracts | Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of open commodity positions, net liability	$ 74	[1]	$ 33	[1]
Energy Segment [Member] | Commodity contracts | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of open commodity positions, net liability			1
Swap [Member] | Energy Segment [Member] | Commodity contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Barrels of crack spreads hedging margin on future gasoline and distillate production			23,300,000
Other Income (Loss) [Member] | Energy Segment [Member] | Commodity contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Realized loss on commodity derivatives	4		3
Other Income (Loss) [Member] | Swap [Member] | Energy Segment [Member] | Commodity contracts | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair value of open commodity positions, net liability	67		16
Realized loss on commodity derivatives	176		60
Cash Flow Hedging [Member] | Energy Segment [Member] | Interest rate swap contracts | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount			63
Lower fixed interest rate paid on interest rate swaps					1.975%	1.94%
Frequency of interest rate swap settlements			90 days
Average fixed interest rate paid on interest rate swaps			1.96%
Realized loss on interest rate swaps reclassified from AOCI into interest expense	1		1
Debt Facility [Member] | Term Loan [Member] | Energy Segment [Member]
Derivatives, Fair Value [Line Items]
Balance of debt partially hedged			$ 125
Effective interest rate on debt hedged			4.56%

[1] Net liability derivatives are located within accrued expenses and other liabilities in our consolidated balance sheets.