(Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jun. 28, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 3,315	$ 3,347		$ 3,374
DS Smith Packaging [Member]
Business Acquisition [Line Items]
Cash and temporary investments			$ 2
Accounts and notes receivable			22
Inventory			8
Plants, properties and equipment			37
Goodwill			27
Intangible assets			14
Right of use assets			3
Deferred charges and other assets			2
Total assets acquired			115
Short-term debt			2
Accounts payable and accrued liabilities			17
Other current liabilities			5
Deferred income taxes			4
Long-term debt			1
Postretirement and postemployment benefit obligation			3
Long-term lease obligations			2
Total liabilities assumed			34
Net assets acquired			$ 81