Derivatives and Fair Value of Financial Instruments-Derivatives Fair Value (Details) - USD ($) $ in Millions	Mar. 30, 2019	Dec. 31, 2018
Commodities
Fair value of each type of derivative and its location in the Consolidated Balance Sheets
Margin account	$ 67	$ 15
Commodities \| Other current assets
Fair value of each type of derivative and its location in the Consolidated Balance Sheets
Asset Derivatives	1	6
Derivative assets and liabilities, net basis	39	17
Commodities \| Other current liabilities
Fair value of each type of derivative and its location in the Consolidated Balance Sheets
Liability Derivatives	29	4
Foreign currencies \| Other current assets
Fair value of each type of derivative and its location in the Consolidated Balance Sheets
Asset Derivatives	$ 4	2
Equity \| Short term investments
Fair value of each type of derivative and its location in the Consolidated Balance Sheets
Liability Derivatives		$ 5

Fair value, after the effects of master netting arrangements, of a 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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Fair value, after the effects of master netting arrangements, of a 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. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of cash or securities placed with a broker or counterparty as security for a trading or derivatives securities position which was partially obtained with funds provided by the broker dealer.

+ References

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-Publisher FASB
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