v3.5.0.2

Summary of Significant Accounting Policies, Narrative (Details) $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 22, 2015 | Dec. 02, 2014 facility | Jun. 19, 2013 | Dec. 31, 2015 USD ($) terminals systems system facility shares | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Nov. 12, 2015 terminals
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | terminals |  |  |  |  | 29 |  |  |  |
Deferred income tax expense |  |  |  |  | $ 1 |  |  |  |
Capitalized interest costs |  |  |  |  | 9 | $ 6 |  | $ 2 |
Goodwill |  |  |  |  | 130 | 164 | [1] |  |
Pollution liability insurance deductible |  |  |  |  | 1 |  |  |  |
Pollution liabilities insurance coverage loss limit |  |  |  |  | 150 |  |  |  |
Debt, fair Value |  |  |  |  | 2,800 | 2,600 |  |  |
Debt, carrying value |  |  |  |  | $ 2,900 | 2,600 |  |  |
Finite-Lived intangible asset, useful life (years) |  |  |  |  | 35 years |  |  |  |
Amortization expense |  |  |  |  | $ 29 |  |  |  |
Amortization expense, 2016 |  |  |  |  | 29 |  |  |  |
Amortization expense, 2017 |  |  |  |  | 29 |  |  |  |
Amortization expense, 2018 |  |  |  |  | 29 |  |  |  |
Amortization expense, 2019 |  |  |  |  | 29 |  |  |  |
Amortization expense, 2020 |  |  |  |  | 29 |  |  |  |
Asset retirement obligations |  |  |  |  |  | 30 |  |  |
Reimbursements from Tesoro |  |  |  |  | 34 | 26 |  | 4 |
Capital contributions by affiliate | [2] |  |  |  | 22 | 26 |  | 5 |
Unit-based compensation expense | [2] |  |  |  | $ 6 | 2 |  | $ 2 |
Units available for future grants (units) | shares |  |  |  |  | 212,310 |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Financial instruments, outstanding term |  |  |  |  | 90 days |  |  |  |
Property, plant and equipment, estimated useful life (years) |  |  |  |  | 3 years |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Cash equivalents maturity period (months) |  |  |  |  | 3 months |  |  |  |
Percent of trade payables outstanding |  |  |  |  | 4.00% |  |  |  |
Percent of trade receivables outstanding |  |  |  |  | 1.00% |  |  |  |
Property, plant and equipment, estimated useful life (years) |  |  |  |  | 28 years |  |  |  |
High plains System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | system |  |  |  |  | 1 |  |  |  |
Williston Gathering System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | system |  |  |  |  | 1 |  |  |  |
Uinta Basin Gathering System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | systems |  |  |  |  | 1 |  |  |  |
Green River System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | system |  |  |  |  | 1 |  |  |  |
Rockies Natural Gas Business Acquisition |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 121 |  |  |  |
Effective date of acquisition |  | Jul. 22, 2015 | Dec. 02, 2014 |  |  |  |  |  |
Northwest Products System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 9 |  |  |
Effective date of acquisition |  |  |  | Jun. 19, 2013 |  |  |  |  |
UBFS |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 38.00% |  |  |  |
Regulated common carrier refined products pipeline system |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Pollution liability insurance deductible |  |  |  |  | $ 5 |  |  |  |
TRG |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Equity method investment |  |  |  |  | 1 |  |  |  |
Ownership interest |  |  |  |  | 50.00% |  |  |  |
Vermillion Gathering System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | system |  |  |  |  | 1 |  |  |  |
Uinta Basin Field Services [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Equity method investment |  |  |  |  | 1 |  |  |  |
Gathering | Rockies Natural Gas Business Acquisition |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 22 |  |  |  |
Processing | Rockies Natural Gas Business Acquisition |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 99 |  |  |  |
Refined products |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Percent retained for volume losses |  |  |  |  | 0.25% |  |  |  |
Refined products | Northwest Products System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Percent retained for volume losses |  |  |  |  | 0.25% |  |  |  |
Distillates | Northwest Products System |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Percent retained for volume losses |  |  |  |  | 0.125% |  |  |  |
Crude oil |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Percent retained for volume losses |  |  |  |  | 0.20% |  |  |  |
Crude Oil And Refined Products Terminals And Storage Facilities |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | terminals |  |  |  |  | 27 |  |  |  | 1
Gas Processing Complexes | Processing |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | facility |  |  |  |  | 4 |  |  |  |
Fractionation Facility |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | facility |  |  | 1 |  |  |  |  |  |
Fractionation Facility | Processing |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Number of assets | facility |  |  |  |  | 1 |  |  |  |
New accounting standard, early adoption |  |  |  |  |  |  |  |  |
Property, Plant and Equipment |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  |  | $ 43 | $ 49 |  |  |
[1] | Adjusted to include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.
[2] | Adjusted to include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

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