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Significant Accounting Policies (Schedule of Business Reorganization) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of revenues $ (4,986) $ (4,329) $ (3,732)
Selling, general and administrative expenses   (294) (244)
As Previously Reported      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of revenues   (4,457) (3,829)
Selling, general and administrative expenses   $ (166) $ (147)