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Business Combinations and Divestitures Schedule of Business Acquisitions, by Acquisition - D3 Technology (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill $ 2,832 $ 2,692 $ 2,741
D3 Technology [Member]      
Business Acquisition [Line Items]      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents 9    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 6    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 20    
Goodwill 54    
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets (3)    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities (8)    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net $ 84