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Debt (Details 6) (Bonds [Member], 5.65% Notes Due 2022 [Member], USD $)
In Millions, unless otherwise specified |
0 Months Ended | 3 Months Ended | 12 Months Ended |
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May 14, 2013
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Jun. 30, 2013
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Dec. 31, 2014
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Bonds [Member] | 5.65% Notes Due 2022 [Member]
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| Extinguishment of Debt [Line Items] | |||
| Debt redemption | $ 40us-gaap_ExtinguishmentOfDebtAmount / us-gaap_DebtInstrumentAxis = unp_NotesDue2022565PercentMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_LongTermDebtMember |
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| Interest rate on note | 5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = unp_NotesDue2022565PercentMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_LongTermDebtMember |
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| Due date of debt | Dec. 01, 2022 | ||
| Early extinguishment of debt | $ (1)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_DebtInstrumentAxis = unp_NotesDue2022565PercentMember / us-gaap_ExtinguishmentOfDebtAxis = us-gaap_LongTermDebtMember |
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- Definition
Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount of debt extinguished. No definition available.
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- Details
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- Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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