XML 49 R39.htm IDEA: XBRL DOCUMENT
v3.25.2

Share Repurchase Programs (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Share Repurchase Program [Abstract] |
Schedule of Share Repurchase Programs | The table below represents shares repurchased under repurchase programs in the six months ended June 30, 2025 and 2024:
| Number of shares purchased |  | Average price paid [a]
| 2025 | 2024 |  | 2025 | 2024
First quarter [b] | 5,745,601 |  | - |  |  | $ | 250.74 |  | $ | - |
Second quarter [c] | 6,111,558 |  | 492,320 |  |  | 205.06 |  | 225.96 |
Total | 11,857,159 |  | 492,320 |  |  | $ | 227.20 |  | $ | 225.96 |
Remaining number of shares that may be repurchased under current authority |  |  | 93,888,442
[a]In the period of the final settlement, the average price under the accelerated share repurchase programs (ASRs) is calculated based on the total program value less the value assigned to the initial delivery of shares. The average price of the completed 2025 ASRs was $229.32. [b]Includes 4,815,022 shares repurchased in 2025 under the ASRs at an average price $251.73. [c]Includes an incremental 1,795,904 shares received upon final settlement in 2025 under the ASRs at an average price of $169.22.

X
- References No definition available. + Details
Name: | srt_ShareRepurchaseProgramAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information related to share repurchase programs. + References No definition available. + Details
Name: | unp_ShareRepurchaseProgramTableTextBlock
Namespace Prefix: | unp_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration