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Subsequent Events (Details) - USD ($) $ in Millions | Apr. 25, 2018 | May 10, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |
Restricted assets |  |  | $ 4,574.9 | $ 4,638.8
Kendall Re | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Notes Issued | $ 225.0 |  |  |
Real estate funds |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Restricted assets |  |  | $ 100.0 | $ 100.0
Limited Partner | Real estate funds | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Restricted assets |  | $ 86.2 |  |

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- Definition The fair value of notes issued in noncash investing and financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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