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Investments in and Advances to Nonconsolidated Affiliates - Schedule of Other Long-term Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Equity method investments:
Capital contributions	$ 0.9	$ 0.9
Cumulative share of income	105.3	97.8
Cumulative share of distributions	(94.5)	(86.0)
Equity Method Investments	11.7	12.7
Cost method investments:
Capital contributions, net of distributions and impairments	0.2	0.3
Total Investments in and advances to nonconsolidated affiliates	$ 11.9	$ 13.0

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- Definition

The Company's cumulative and proportionate receipt of distributed earnings since inception of its investment in an equity method affiliate.

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The Company's cumulative and proportionate share of income earned since inception of its investment in an equity method affiliate as of the balance sheet date.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Name Accounting Standards Codification
-Topic 325
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

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-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.12)
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