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Restructuring and Other (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]        
Litigation Settlement, Expense $ 16      
Asset impairments and sales 0 $ (5) $ (6) $ (7)
European specialty packaging business [Member]        
Restructuring Cost and Reserve [Line Items]        
Asset impairments and sales (5)      
Other Actions [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring accrual $ 12   $ 12