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Commitments and Contingencies Lessee Operating Lease Liability Maturity (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Lessee, Operating Lease, Liability, Maturity [Table Text Block] | Future estimated minimum lease payments and expected lease administration payments for leases with remaining terms in excess of one year follow (in millions):
2019 | $ | 0.9 |
2020 | 0.9 |
2021 | 0.9 |
2022 | 1.0 |
2023 | 1.0 |
Thereafter | 3.8 |
| $ | 8.5 |

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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