Document and Entity Information Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) Consolidated Statements Of Comprehensive Income Consolidated Statements Of Cash Flows Basis Of Presentation Earnings Per Share Business Segments Business Segments (Tables) Business Segments (Details) Fair Value Of Financial Instruments Cash, Cash Equivalents And Marketable Securities Cash, Cash Equivalents And Marketable Securities (Tables) Cash, Cash Equivalents And Marketable Securities (Narrative) (Details) Cash, Cash Equivalents And Marketable Securities (Summary Of The Amortized Costs And Fair Values Of Marketable Securities) (Details) Commitments And Contingencies Adoption Of New Accounting Standards