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Retirement Plans (Details 9) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| 401(k)/Thrift Plan [Abstract] | |||
| 401(k)/Thrift plan description | We provide a defined contribution plan (401(k)/thrift plan) to eligible non-union and union employees for whom we make matching contributions. We match 50 cents for each dollar contributed by employees up to the first six percent of compensation contributed. | ||
| 401(k)/Thrift plan contributions | $ 19us-gaap_DefinedContributionPlanCostRecognized | $ 18us-gaap_DefinedContributionPlanCostRecognized | $ 15us-gaap_DefinedContributionPlanCostRecognized |
| Railroad Retirement System [Abstract] | |||
| Railroad Retirement System description | All Railroad employees are covered by the Railroad Retirement System (the System). | ||
| Railroad Retirement System contributions | 711unp_RailroadRetirementSystemContributions | 670unp_RailroadRetirementSystemContributions | 644unp_RailroadRetirementSystemContributions |
| Collective Bargaining Agreements [Abstract] | |||
| Collective bargaining agreements description | Under collective bargaining agreements, we participate in multi-employer benefit plans that provide certain postretirement health care and life insurance benefits for eligible union employees. | ||
| Collective bargaining agreements premiums | $ 52us-gaap_MultiemployerPlanPeriodContributions | $ 57us-gaap_MultiemployerPlanPeriodContributions | $ 62us-gaap_MultiemployerPlanPeriodContributions |
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- Details
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- Definition
Contribution made to the railroad retirement system for the benefit of the employee. No definition available.
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- Definition
Retirement System that provides retirement benefits for railroad employees. No definition available.
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- Details
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- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Description of the terms and benefits provided by the employer's defined contribution plans. A defined contribution plan provides benefits in return for services rendered, provides an individual account for each participant, and has terms that specify how contributions to the individual's account are to be determined rather than the amount of benefits the individual is to receive. Under a defined contribution pension plan, the benefits a participant will receive depend solely on the amount contributed to the participant's account, the returns earned on investments of those contributions, and forfeitures of other participants' benefits that may be allocated to such participant's account. A description of the plan(s) including employee groups covered, the basis for determining contributions, and the nature and effects of significant matters affecting comparability of information for all periods presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Description of the nature of multiemployer plan benefits as well as who is covered by the benefits. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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