Asset Retirement Obligations (Tables)
|3 Months Ended|
Mar. 31, 2019
|Asset Retirement Obligations [Abstract]|
|Summary of Changes In Asset Retirement Obligations||
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.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef