Discontinued Operations - Balance Sheet (Details) - Milgard and UKWG - Discontinued Operations, Held-for-sale or Disposed of by Sale - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash investments	$ 5	$ 6
Receivables	60	85
Prepaid expenses and other	13	18
Inventories	33	42
Property and equipment, net	151	186
Operating lease right-of-use assets	30
Goodwill	199	206
Other intangible assets, net	112	117
Total assets classified as held for sale	603	660
Accounts payable	66	75
Accrued liabilities	74	74
Other liabilities	133	108
Total liabilities classified as held for sale	$ 273	$ 257