Supplemental Balance Sheet and Cash Flow Information - Inventory Components (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Text Block [Abstract]
Raw materials	$ 515	$ 433
Work in process and finished goods	822	649
Inventory reserves	(55)	(51)
Total	$ 1,282	$ 1,031

Amount before valuation reserves of merchandise or goods held by the entity that are readily available for sale and items held by the entity which are partially complete or in the process of being readied for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

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Amount of valuation reserve for inventory.

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