Acquisitions and Dispositions Divestitures (Details) $ in Millions		1 Months Ended	3 Months Ended								12 Months Ended
	Sep. 01, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash (used for)/from operating activities, discontinued operations											$ (4)	$ (20)	$ 17
Number of reportable business segments | Segment											2
Total Net sales			$ 3,672	$ 3,826	$ 4,024	$ 3,624	$ 3,645	$ 3,817	$ 4,131	$ 3,781	$ 15,146	15,374	14,748
Net gains on the divestitures of businesses											0	0	25
Income tax expense											392	353	615
Income from discontinued operations, net of tax			$ 292	$ 367	$ 272	$ 312	$ 258	$ 378	$ 371	$ 334	1,243	1,341	1,594
North American Fiber Glass Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gains on the divestitures of businesses	$ 343
Estimated proceeds from sale of business	$ 541
Glass Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax												13
Cash (used for)/from operating activities, discontinued operations												20
Total Net sales											0	0	217
Income from operations											3	21	30
Net gains on the divestitures of businesses											0	0	343
Income tax expense											1	5	140
Income from discontinued operations, net of tax											$ 2	$ 16	$ 233
Mexican Plaka Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gains on the divestitures of businesses		$ 25