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Inventories - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Inventory Net [Abstract] |  |
LIFO inventory amount | $ 674 | $ 622
Percentage of LIFO inventory | 50.00% | 45.00%

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- References No definition available. + Details
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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent. + References No definition available. + Details
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