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Litigation and Environmental Louisiana Governmental (Details) - Coastal Zone | Mar. 29, 2019 Parties | Nov. 08, 2013 Parties | Jan. 31, 2015 cases
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Judicial District of Louisiana |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Pending Claims, Number |  |  | 40
TGP | Judicial District of Louisiana |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Pending Claims, Number |  |  | 1
TGP | Parish of Plaquemines, Louisiana |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Number of Defendants | Parties |  | 17 |
SNG | Judicial District of Louisiana |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Pending Claims, Number |  |  | 1
SNG | Parish of Orleans, Louisiana |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Number of Defendants | Parties | 10 |  |

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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 + Details
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