Financial Instruments, Derivatives and Hedging Activities Balance Sheet Location (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair value of commodity contracts
Fair value of assets	$ 31	$ 14
Fair value of liabilities	25	31
Commodity and Foreign Currency Contracts \| Accounts Receivable, Net
Fair value of commodity contracts
Fair value of assets	29	11
Commodity and Foreign Currency Contracts \| Accounts Payable and Accrued Liabilities
Fair value of commodity contracts
Fair value of liabilities	14	23
Commodity, foreign currency, and interest rate contracts \| Other Assets
Fair value of commodity contracts
Fair value of assets	2	3
Commodity, foreign currency, and interest rate contracts \| Non Current Liabilities
Fair value of commodity contracts
Fair value of liabilities	$ 11	$ 8

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226052-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- Definition

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

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- Definition

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+ References

No definition available.

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