101 - Statement - Statement Of Financial Position Classified link:calculationLink link:presentationLink link:definitionLink 102 - Statement - Statement Of Financial Position Classified (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 103 - Statement - Statement Of Income Alternative link:calculationLink link:presentationLink link:definitionLink 104 - Statement - Statement Of Shareholders Equity And Other Comprehensive Income link:calculationLink link:presentationLink link:definitionLink 105 - Statement - Statement Of Shareholders Equity And Other Comprehensive Income (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 106 - Statement - Statement Of Cash Flows Indirect link:calculationLink link:presentationLink link:definitionLink 107 - Statement - Statement Of Other Comprehensive Income link:calculationLink link:presentationLink link:definitionLink 108 - Disclosure - NOTE A. Organization and Nature of Operations link:calculationLink link:presentationLink link:definitionLink 109 - Disclosure - NOTE B. Basis of Presentation link:calculationLink link:presentationLink link:definitionLink 110 - Disclosure - NOTE C. Exploratory Well Costs link:calculationLink link:presentationLink link:definitionLink 111 - Disclosure - NOTE D. Disclosures About Fair Value Measurements link:calculationLink link:presentationLink link:definitionLink 112 - Disclosure - NOTE E. Income Taxes link:calculationLink link:presentationLink link:definitionLink 113 - Disclosure - NOTE F. Long-term Debt link:calculationLink link:presentationLink link:definitionLink 114 - Disclosure - NOTE G. Derivative Financial Instruments link:calculationLink link:presentationLink link:definitionLink 115 - Disclosure - NOTE H. Asset Retirement Obligations link:calculationLink link:presentationLink link:definitionLink 116 - Disclosure - NOTE I. Postretirement Benefit Obligations link:calculationLink link:presentationLink link:definitionLink 117 - Disclosure - NOTE J. Commitments and Contingencies link:calculationLink link:presentationLink link:definitionLink 118 - Disclosure - NOTE K. Earnings Per Share From Continuing Operations link:calculationLink link:presentationLink link:definitionLink 119 - Disclosure - NOTE L. Geographic Operating Segment Information link:calculationLink link:presentationLink link:definitionLink 120 - Disclosure - NOTE M. Impairment of Oil and Gas Properties link:calculationLink link:presentationLink link:definitionLink 121 - Disclosure - NOTE N. Volumetric Production Payments link:calculationLink link:presentationLink link:definitionLink 122 - Disclosure - NOTE O. Interest and Other Income link:calculationLink link:presentationLink link:definitionLink 123 - Disclosure - NOTE P. Other Expense link:calculationLink link:presentationLink link:definitionLink 124 - Disclosure - NOTE Q. Insurance Claims link:calculationLink link:presentationLink link:definitionLink 125 - Disclosure - NOTE R. Discontinued Operations link:calculationLink link:presentationLink link:definitionLink 126 - Disclosure - NOTE S. Subsequent Events link:calculationLink link:presentationLink link:definitionLink 127 - Disclosure - Document Information link:calculationLink link:presentationLink link:definitionLink 128 - Disclosure - Entity Information link:calculationLink link:presentationLink link:definitionLink