XML 100 R47.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Accounting for Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Accounting for Asset Retirement Obligations [Abstract] |
Reconciliation of Asset Retirement Obligations | The following is a reconciliation of asset retirement obligations as of December 31, 2019 and 2018:
|  | December 31, |
(millions of dollars) |  | 2019 |  |  | 2018 |
Asset retirement liability, beginning of period |  | $ | 23.4 |  |  | $ | 22.1 |
Accretion expense |  |  | 2.7 |  |  |  | 1.0 |
Other |  |  | 1.1 |  |  |  | 2.1 |
Payments |  |  | (3.3 | ) |  |  | (1.3 | )
Foreign currency translation |  |  | — |  |  |  | (0.5 | )
Asset retirement liability, end of period |  | $ | 23.9 |  |  | $ | 23.4 |

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration