Acquisitions and Dispositions Divestitures (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 3,682	$ 3,776	$ 3,806	$ 3,486	$ 3,417	$ 3,660	$ 3,782	$ 3,411	$ 14,750	$ 14,270	$ 14,241
Gain on disposals of ownership interests in business affiliates									25	46	0
Income Tax Expense (Benefit)									616	217	413
Net Income (Loss) Attributable to Parent	147	609	$ 501	$ 334	344	$ (184)	$ 370	$ 347	1,591	877	1,406
Assets held-for-sale	0				223				0	223
Liabilities held-for-sale	$ 0				64				0	64
Pension Settlement Charges									60	968	0
Gain (Loss) on Sale of Equity Investments									25	39	0
North American Fiber Glass Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated Proceeds from Sale of Business		541
Gain on disposals of ownership interests in business affiliates		$ 343
Entity Number of Employees		1,000
Sales Revenue, Goods, Net										350
Flat Glass Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated Proceeds from Sale of Business					740					740
Gain on disposals of ownership interests in business affiliates										421
Glass Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					38					38
Net sales									217	908	1,089
Results of Operations, Income before Income Taxes									23	111	137
Gain on disposals of ownership interests in business affiliates									343	421	0
Income Tax Expense (Benefit)									138	202	42
Net Income (Loss) Attributable to Parent									228	330	$ 95
Disposal Group, Including Discontinued Operation, Inventory					32					32
Disposal Group, Including Discontinued Operation, Other Assets, Current					1					1
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment					151					151
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities					30					30
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent					1					1
Assets held-for-sale					193					193
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities					52					52
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent					12					12
Liabilities held-for-sale					$ 64					64
European Fiber Glass [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposals of ownership interests in business affiliates										(42)
Pension Settlement Charges										46
Fiber Glass Asian Joint Ventures [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Sale of Equity Investments										(36)
Mexican Plaka Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposals of ownership interests in business affiliates									$ 25
Pittsburgh Glass Works L L C [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Sale of Equity Investments										$ (20)