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Asset Retirement Obligation (Tables) | 6 Months Ended
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Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table sets forth the change in the asset retirement obligations associated with our advertising structures located on leased properties. The obligation is calculated based on the assumption that all of our advertising structures will be removed within the next 50 years. The estimated annual costs to dismantle and remove the structures upon the termination or non-renewal of our leases are consistent with our historical experience.
(in millions) |  |
As of December 31, 2018 |  | $ | 34.2 |
Accretion expense |  | 1.3 |
Additions |  | 0.2 |
Liabilities settled |  | (1.1 | )
Foreign currency translation adjustments |  | 0.2 |
As of June 30, 2019 |  | $ | 34.8 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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