Equity Method Investment, Aggregate Cost [Roll Forward]

No definition available.

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- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the amount of unrealized intercompany profits and losses on transactions between the Entity and unconsolidated subsidiaries (including certain corporate joint ventures, and noncontrolled corporations), accounted for under the equity method of accounting, which have not been eliminated in preparing the Entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.3A-04)
-URI http://asc.fasb.org/extlink&oid=116822174&loc=d3e355119-122828

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- Definition

The net cash outflow or inflow associated with the acquisition or sale of a business segment during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

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Investments - Other Investments (Details) - USD ($) $ in Millions			1 Months Ended	12 Months Ended
	Dec. 18, 2017	Jul. 26, 2016	Jan. 31, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Method Investment, Aggregate Cost [Roll Forward]
Opening undistributed value of investment, beginning balance				$ 67.1	$ 66.4
Investment in the period				1.1	1.4
Unrealized gain/(loss) for the period				(0.3)	(0.7)
Closing value of investment, ending balance				67.9	67.1	$ 66.4
MVI
Equity Method Investment, Aggregate Cost [Roll Forward]
Opening undistributed value of investment, beginning balance				0.5	0.5
Investment in the period			$ 0.8	0.0	0.2	0.1
Unrealized gain/(loss) for the period				(0.1)	(0.2)
Closing value of investment, ending balance				0.4	0.5	0.5
Bene
Equity Method Investment, Aggregate Cost [Roll Forward]
Opening undistributed value of investment, beginning balance				3.2	2.9
Investment in the period		$ 3.3			1.2
Equity method investment, cash payment				1.1	1.2
Unrealized gain/(loss) for the period				0.0	(0.9)
Closing value of investment, ending balance				4.3	3.2	2.9
Digital Re
Equity Method Investment, Aggregate Cost [Roll Forward]
Opening undistributed value of investment, beginning balance				0.9	0.5
Investment in the period				0.0	0.0
Unrealized gain/(loss) for the period				(0.2)	0.4
Closing value of investment, ending balance				0.7	0.9	0.5
Crop Re
Equity Method Investment, Aggregate Cost [Roll Forward]
Opening undistributed value of investment, beginning balance				62.5	62.5
Investment in the period				0.0	0.0
Equity method investment, cash payment	$ 5.9
Unrealized gain/(loss) for the period				0.0	0.0
Closing value of investment, ending balance	$ 62.5			$ 62.5	$ 62.5	$ 62.5