00100 - Statement - Consolidated Statements of Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 00210 - Statement - Consolidated Balance Sheets (Parenthetical) (Unaudited) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Stock-based Compensation (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Income Taxes (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Earnings Per Share (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Stock Repurchase Program (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Investments (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Pensions and Other Postretirement Benefits (Unaudited) link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Fair Value (Unaudited) link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Commitments and Contingencies (Unaudited) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Earnings Per Share (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Investments (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - Fair Value (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 40104 - Disclosure - Stock-based Compensation (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - Income Taxes (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40304 - Disclosure - Earnings Per Share (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - Stockholders' Equity (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40504 - Disclosure - Stock Repurchase Program (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40604 - Disclosure - Investments (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40614 - Disclosure - Investments Parenthetical (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - Debt (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - Pensions and Other Postretirement Benefits (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 40904 - Disclosure - Comprehensive Income (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - Fair Value (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 41104 - Disclosure - Commitments and Contingencies (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Stockholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Debt (Unaudited) link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - Stock-based Compensation (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Pensions and Other Postretirement Benefits (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Comprehensive Income (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink