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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements on a Recurring Basis

The following tables present the assets carried at fair value as of year-end 2017 and 2016 on the consolidated balance sheet by fair value hierarchy level, as described below. 

Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities.  Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs. 

		Fair Value Measurements on a Recurring Basis As of Year-End 2017
Description		Total				Level 1				Level 2				Level 3
		(In millions of dollars)
Money market funds		$	4.3			$	4.3			$	—			$	—
Available-for-sale investment		228.1				228.1				—				—
Total assets at fair value		$	232.4			$	232.4			$	—			$	—

		Fair Value Measurements on a Recurring Basis As of Year-End 2016
Description		Total				Level 1				Level 2				Level 3
		(In millions of dollars)
Money market funds		$	4.0			$	4.0			$	—			$	—
Available-for-sale investment		141.2				141.2				—				—
Total assets at fair value		$	145.2			$	145.2			$	—			$	—

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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X

- References

No definition available.

+ Details

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