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Subsequent Events Subsequent Events (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 20, 2020
Jul. 06, 2020
Jun. 30, 2020
Dec. 31, 2019
Subsequent Event [Line Items]        
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized     $ 110 $ 257
Polyplastics Co., Ltd. [Member] | Engineered Materials | Subsequent Event        
Subsequent Event [Line Items]        
Equity Method Investment, Ownership Percentage 45.00%      
Expected Proceeds from Sale of Equity Method Investments $ 1,600      
Secured Debt [Member] | AmendedRestatedReceivableSecuritizationFacility [Member] | Subsequent Event        
Subsequent Event [Line Items]        
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized   $ 87    
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers   $ 30    
PercentageOfFairValueOfSalesReceivables   100.00%    
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member]        
Subsequent Event [Line Items]        
Repayments of Lines of Credit     $ 28  
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member] | Subsequent Event        
Subsequent Event [Line Items]        
Repayments of Lines of Credit   $ 87