UNION PACIFIC CORP

0000001 - Document - Cover

9952151 - Statement - Condensed Consolidated Statements of Income (Unaudited)

9952152 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)

9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical)

9952154 - Statement - Condensed Consolidated Statements of Financial Position (Unaudited)

9952155 - Statement - Condensed Consolidated Statements of Financial Position (Unaudited) (Parenthetical)

9952156 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)

9952157 - Statement - Condensed Consolidated Statements of Changes in Common Shareholders' Equity (Unaudited)

9952158 - Statement - Condensed Consolidated Statements of Changes in Common Shareholders' Equity (Unaudited) (Parentheticals)

9952159 - Disclosure - Basis of Presentation

9952160 - Disclosure - Accounting Pronouncements

9952161 - Disclosure - Operations and Segmentation

9952162 - Disclosure - Stock-Based Compensation

9952163 - Disclosure - Retirement Plans

9952164 - Disclosure - Other Income

9952165 - Disclosure - Earnings Per Share

9952166 - Disclosure - Accumulated Other Comprehensive Income/Loss

9952167 - Disclosure - Accounts Receivable

9952168 - Disclosure - Properties

9952169 - Disclosure - Accounts Payable and Other Current Liabilities

9952170 - Disclosure - Financial Instruments

9952171 - Disclosure - Debt

9952172 - Disclosure - Commitments and Contingencies

9952173 - Disclosure - Share Repurchase Programs

9952174 - Disclosure - Related Parties

9952175 - Disclosure - Pending Acquisition

995445 - Disclosure - Insider Trading Arrangements

9955511 - Disclosure - Operations and Segmentation (Tables)

9955512 - Disclosure - Stock-Based Compensation (Tables)

9955513 - Disclosure - Retirement Plans (Tables)

9955514 - Disclosure - Other Income (Tables)

9955515 - Disclosure - Earnings Per Share (Tables)

9955516 - Disclosure - Accumulated Other Comprehensive Income/Loss (Tables)

9955517 - Disclosure - Properties (Tables)

9955518 - Disclosure - Accounts Payable and Other Current Liabilities (Tables)

9955519 - Disclosure - Commitments and Contingencies (Tables)

9955520 - Disclosure - Share Repurchase Programs (Tables)

9955521 - Disclosure - Pending Acquisition (Tables)

9955522 - Disclosure - Operations and Segmentation - Narrative (Details)

9955523 - Disclosure - Operations and Segmentation - Freight and Other Revenues (Details)

9955524 - Disclosure - Stock-Based Compensation - Stock Based Compensation Expense (Details)

9955525 - Disclosure - Stock-Based Compensation - Narrative (Details)

9955526 - Disclosure - Stock-Based Compensation - Annual Weighted Average Assumptions (Details)

9955527 - Disclosure - Stock-Based Compensation - Stock Option Activity (Details)

9955528 - Disclosure - Stock-Based Compensation - Additional Information Regarding Stock Option Exercises (Details)

9955529 - Disclosure - Stock-Based Compensation - Changes in Retention Awards (Details)

9955530 - Disclosure - Stock-Based Compensation - Changes in Performance Stock Unit Awards (Details)

9955531 - Disclosure - Retirement Plans - Narrative (Details)

9955532 - Disclosure - Retirement Plans - Net Periodic Pension Benefit/Cost (Details)

9955533 - Disclosure - Other Income (Details)

9955534 - Disclosure - Earnings Per Share (Details)

9955535 - Disclosure - Accumulated Other Comprehensive Income/Loss (Details)

9955536 - Disclosure - Accounts Receivable (Details)

9955537 - Disclosure - Properties (Details)

9955538 - Disclosure - Accounts Payable and Other Current Liabilities (Details)

9955539 - Disclosure - Financial Instruments (Details)

9955540 - Disclosure - Debt (Details)

9955541 - Disclosure - Commitments and Contingencies - Narrative (Details)

9955542 - Disclosure - Commitments and Contingencies - Personal Injury Liability Activity (Details)

9955543 - Disclosure - Commitments and Contingencies - Environmental Liability Activity (Details)

9955544 - Disclosure - Share Repurchase Programs - Narrative (Details)

9955545 - Disclosure - Share Repurchase Programs - Share Repurchase Programs (Details)

9955546 - Disclosure - Related Parties (Details)

9955547 - Disclosure - Pending Acquisition - Narrative (Details)

9955548 - Disclosure - Pending Acquisition - Acquisition-Related Expense Associated with the Merger Agreement (Details)