Acquisitions, Dispositions and Plant Closures (Schedule of Business Acquisitions, by Acquisition) (Details) - USD ($) $ in Millions		Dec. 31, 2018	[1]	Feb. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 1,057			$ 1,003	$ 796
Omni Plastics [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired				100.00%
Cash and cash equivalents				$ 2
Trade receivables - third party and affiliates				12
Inventories				13
Property, plant and equipment, net				19
Intangible assets (Note 11)				35
Goodwill	[2]			84
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets				1
Total fair value of assets acquired				166
Trade payables - third party and affiliates				(8)
Total debt (Note 14)				(12)
Total fair value of liabilities assumed				(20)
Net assets acquired				$ 146
Business Combination, Net Earnings as a Percent of Acquirer's Net earnings				1.00%

[1] There were $0 million of accumulated impairment losses as of December 31, 2018.

[2] Goodwill consists of expected revenue and operating synergies resulting from the acquisition, all of which is deductible for income tax purposes.