Inventories - Components of Inventories (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Raw material	$ 108	$ 90
Work in progress	15	21
Finished products	71	70
Inventories	194	181
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Inventory reserve at beginning of year	(27)	(25)
Inventory reserve at end of year	(23)	(27)
Total inventories, net of reserve	172	154	$ 149
Inventory
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reversal of allowance	1	5
Addition to allowance	(3)	(6)
Write-off against allowance	5	1
Translation difference	$ 1	$ (2)

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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.

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Amount of decrease in valuation and qualifying accounts and reserves.

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