UNION PACIFIC CORP

0000001 - Document - Cover

0000002 - Document - Audit Information

9952151 - Statement - Consolidated Statements of Income

9952152 - Statement - Consolidated Statements of Comprehensive Income

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

9952154 - Statement - Consolidated Statements of Financial Position

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

9952156 - Statement - Consolidated Statements of Cash Flows

9952157 - Statement - Consolidated Statements of Changes in Common Shareholders' Equity

9952158 - Statement - Consolidated Statements of Changes in Common Shareholders' Equity (Parenthetical)

9952159 - Disclosure - Nature of Operations

9952160 - Disclosure - Significant Accounting Policies

9952161 - Disclosure - Accounting Pronouncements

9952162 - Disclosure - Stock Options and Other Stock Plans

9952163 - Disclosure - Retirement Plans

9952164 - Disclosure - Other Income

9952165 - Disclosure - Income Taxes

9952166 - Disclosure - Earnings Per Share

9952167 - Disclosure - Accumulated Other Comprehensive Income/Loss

9952168 - Disclosure - Accounts Receivable

9952169 - Disclosure - Properties

9952170 - Disclosure - Accounts Payable and Other Current Liabilities

9952171 - Disclosure - Financial Instruments

9952172 - Disclosure - Debt

9952173 - Disclosure - Variable Interest Entities

9952174 - Disclosure - Leases

9952175 - Disclosure - Commitments and Contingencies

9952176 - Disclosure - Share Repurchase Programs

9952177 - Disclosure - Related Parties

9952178 - Disclosure - Pending Acquisition

995445 - Disclosure - Insider Trading Arrangements

995447 - Disclosure - Insider Trading Policies and Procedures

995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure

9955511 - Disclosure - Significant Accounting Policies (Policies)

9955512 - Disclosure - Nature of Operations (Tables)

9955513 - Disclosure - Significant Accounting Policies (Tables)

9955514 - Disclosure - Stock Options and Other Stock Plans (Tables)

9955515 - Disclosure - Retirement Plans (Tables)

9955516 - Disclosure - Other Income (Table)

9955517 - Disclosure - Income Taxes (Tables)

9955518 - Disclosure - Earnings Per Share (Tables)

9955519 - Disclosure - Accumulated Other Comprehensive Income/Loss (Tables)

9955520 - Disclosure - Properties (Tables)

9955521 - Disclosure - Accounts Payable and Other Current Liabilities (Tables)

9955522 - Disclosure - Debt (Tables)

9955523 - Disclosure - Leases (Tables)

9955524 - Disclosure - Commitments and Contingencies (Tables)

9955525 - Disclosure - Share Repurchase Programs (Tables)

9955526 - Disclosure - Pending Acquisition (Tables)

9955527 - Disclosure - Nature of Operations - Narrative (Details)

9955528 - Disclosure - Nature of Operations - Schedule of Freight and Other Revenues (Details)

9955529 - Disclosure - Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details)

9955530 - Disclosure - Significant Accounting Policies - Revenue Recognition (Details)

9955531 - Disclosure - Stock Options and Other Stock Plans - Narrative (Details)

9955532 - Disclosure - Stock Options and Other Stock Plans - Schedule of Stock Based Compensation Expense (Details)

9955533 - Disclosure - Stock Options and Other Stock Plans - Schedule of Annual Weighted Average Assumptions (Details)

9955534 - Disclosure - Stock Options and Other Stock Plans - Schedule of Stock Option Activity (Details)

9955535 - Disclosure - Stock Options and Other Stock Plans - Schedule of Additional Information Regarding Stock Option Exercises (Details)

9955536 - Disclosure - Stock Options and Other Stock Plans - Schedule of Changes in Retention Awards (Details)

9955537 - Disclosure - Stock Options and Other Stock Plans - Schedule of Changes in Performance Stock Unit Awards (Details)

9955538 - Disclosure - Retirement Plans - Schedule of Funded Status (Details)

9955539 - Disclosure - Retirement Plans - Narrative (Details)

9955540 - Disclosure - Retirement Plans - Schedule of Amount Recognized in Financial Position (Details)

9955541 - Disclosure - Retirement Plans - Schedule of Pre-Tax Changes in Other Comprehensive Income/Loss (Details)

9955542 - Disclosure - Retirement Plans - Schedule of Underfunded Accumulated Benefit Obligation (Details)

9955543 - Disclosure - Retirement Plans - Schedule of Weighted Average Assumptions (Details)

9955544 - Disclosure - Retirement Plans - Schedule of Net Periodic Pension Benefit/Cost (Details)

9955545 - Disclosure - Retirement Plans - Schedule of Qualified and Non-Qualified Pension Plans (Details)

9955546 - Disclosure - Retirement Plans - Schedule of Expected Benefit Payments (Details)

9955547 - Disclosure - Retirement Plans - Schedule of Pension Plan Asset Allocation (Details)

9955548 - Disclosure - Retirement Plans - Schedule of Plan Asset Measured on a Recurring Basis (Details)

9955549 - Disclosure - Other Income (Details)

9955550 - Disclosure - Income Taxes - Schedule of Income Tax Expense Components (Details)

9955551 - Disclosure - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)

9955552 - Disclosure - Income Taxes - Narrative (Details)

9955553 - Disclosure - Income Taxes - Schedule of Deferred Income Tax Assets (Liabilities) (Details)

9955554 - Disclosure - Income Taxes - Schedule of Unrecognized Tax Benefits Assets (Liabilities) (Details)

9955555 - Disclosure - Earnings Per Share - Schedule of Reconciliation of Basic and Diluted (Details)

9955556 - Disclosure - Earnings Per Share - Narrative (Details)

9955557 - Disclosure - Accumulated Other Comprehensive Income/Loss (Details)

9955558 - Disclosure - Accounts Receivable (Details)

9955559 - Disclosure - Properties - Schedule of Property and Equipment and Weighted Average Estimated Useful Life (Details)

9955560 - Disclosure - Properties - Narrative (Details)

9955561 - Disclosure - Accounts Payable and Other Current Liabilities (Details)

9955562 - Disclosure - Financial Instruments (Details)

9955563 - Disclosure - Debt - Schedule of Total Debt (Details)

9955564 - Disclosure - Debt - Schedule of Aggregate Debt Maturities (Details)

9955565 - Disclosure - Debt - Narrative (Details)

9955566 - Disclosure - Debt - Schedule of Unsecured, Fixed-Rate Debt Securities Under Our Shelf Registration (Details)

9955567 - Disclosure - Variable Interest Entities (Details)

9955568 - Disclosure - Leases - Schedule of Leases Assets and Liabilities (Details)

9955569 - Disclosure - Leases - Schedule of Lease Costs (Details)

9955570 - Disclosure - Leases - Schedule of Aggregate Lease Maturities (Details)

9955571 - Disclosure - Leases - Schedule of Weighted Average Lease Term and Discount Rate (Details)

9955572 - Disclosure - Leases - Schedule of Other Lease Information (Details)

9955573 - Disclosure - Commitments and Contingencies - Narrative (Details)

9955574 - Disclosure - Commitments and Contingencies - Schedule of Personal Injury Liability Activity (Details)

9955575 - Disclosure - Commitments and Contingencies - Schedule of Environmental Liability Activity (Details)

9955576 - Disclosure - Share Repurchase Programs - Narrative (Details)

9955577 - Disclosure - Share Repurchase Programs - Schedule of Share Repurchase Programs (Details)

9955578 - Disclosure - Related Parties (Details)

9955579 - Disclosure - Pending Acquisition - Narrative (Details)

9955580 - Disclosure - Pending Acquisition - Schedule of Acquisition-Related Expense Associated with the Merger Agreement (Details)