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Acquisitions and Dispositions (Acquistions) (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]                      
Net sales $ 3,682 $ 3,776 $ 3,806 $ 3,486 $ 3,417 $ 3,660 $ 3,782 $ 3,411 $ 14,750 $ 14,270 $ 14,241
Consideration Paid for Acquired Entities, Net of Cash Acquired, Debt Assumed, and Other Adjustments                 74 43 $ 371
The Crown Group [Member]                      
Business Acquisition [Line Items]                      
Net sales                   125  
Taiwan Chlorine Industries (“TCI”) [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net $ 100               $ 100    
Noncontrolling Interest, Ownership Percentage by Parent 40.00%               40.00%    
MetoKote Corporation [Member]                      
Business Acquisition [Line Items]                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net         $ 306         $ 306