(Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Business Acquisition [Line Items]          
Goodwill $ 3,347   $ 3,374 $ 3,411  
DS Smith Packaging [Member]          
Business Acquisition [Line Items]          
Cash and temporary investments   $ 2      
Accounts and notes receivable   22      
Inventory   8      
Plants, properties and equipment   40      
Goodwill   23      
Other intangible assets   16      
Right of use assets   3      
Deferred charges and other assets   1      
Total assets acquired   115      
Short-term debt   2      
Accounts payable and accrued liabilities   21      
Other current liabilities   4      
Deferred Income Taxes   3      
Long-term lease obligations   3      
Other long-term liabilities   1      
Total liabilities assumed   34      
Net assets acquired   $ 81      
Tangier, Morocco Facility [Member]          
Business Acquisition [Line Items]          
Cash and temporary investments         $ 1
Accounts and notes receivable         7
Inventory         3
Plants, properties and equipment         31
Goodwill         4
Other intangible assets         5
Deferred charges and other assets         4
Total assets acquired         55
Accounts payable and accrued liabilities         4
Long-term debt         11
Other long-term liabilities         2
Total liabilities assumed         17
Net assets acquired         $ 38