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Employment Benefit Plans Expected Benefit Payments (Details)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expected benefit payments, 2017 $ 166 [1]
Expected benefit payments, 2018 153 [1]
Expected benefit payments, 2019 152 [1]
Expected benefit payments, 2020 151 [1]
Expected benefit payments, 2021 145 [1]
Expected benefit payments, 2022 - 2026 661 [1]
Retiree Health and Welfare Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expected benefit payments, 2017 19
Expected benefit payments, 2018 18
Expected benefit payments, 2019 18
Expected benefit payments, 2020 17
Expected benefit payments, 2021 16
Expected benefit payments, 2022 - 2026 73
Funded Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Benefit Payments Expected in Next Fiscal Year 0
Unfunded Non-Qualified Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Benefit Payments Expected in Next Fiscal Year $ 11
[1] Primarily consists of the BNSF Retirement Plan payments, which are made from the plan trust and do not represent an immediate cash outflow to the Company.