v3.5.0.2

Commitments and Contingencies (Details) - USD ($) $ in Millions |  |  |  |  |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 15, 2016 | Mar. 29, 2016 | Mar. 22, 2016 | Jan. 30, 2014 | May 01, 2012 | Jun. 30, 2016 | Dec. 31, 2015 | Dec. 02, 2014
Changes in Environmental Liabilities |  |  |  |  |  |  |  |
Accruals for environmental expenditures |  |  |  |  |  | $ 24 | $ 33 |
Tioga Crude Oil Pipeline Release |  |  |  |  |  |  |  |
Changes in Environmental Liabilities |  |  |  |  |  |  |  |
Accruals for environmental expenditures |  |  |  |  |  | 19 | 27 |
Environmental liability insurance deductible |  |  |  |  |  | 1 |  |
Environmental liabilities insurance coverage limit |  |  |  |  |  | 25 |  |
Estimated Environmental Remediation Expense |  |  |  |  |  |  | 66 |
Total remediation costs in excess of insurance |  |  |  |  |  |  | $ (41) |
Questar Gas Company v. QEP Field Services Company |  |  |  |  |  |  |  |
Changes in Environmental Liabilities |  |  |  |  |  |  |  |
Loss Contingency, Settlement Agreement, Date |  |  | March 22, 2016 |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  | 15 |  |
Complaint filing date |  |  |  |  | May 1, 2012 |  |  |
Liability for estimated damages |  |  |  |  |  |  |  | $ 21
Gain (Loss) Related to Litigation Settlement |  |  |  |  |  | $ 6 |  |
XTO Energy Inc. v. QEP Field Services Company |  |  |  |  |  |  |  |
Changes in Environmental Liabilities |  |  |  |  |  |  |  |
Loss Contingency, Settlement Agreement, Date |  | March 29, 2016 |  |  |  |  |  |
Litigation Settlement, Amount | $ 22 |  |  |  |  |  |  |
Complaint filing date |  |  |  | January 30, 2014 |  |  |  |
Proceeds from Legal Settlements | $ 21 |  |  |  |  |  |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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