Variable Interest Entities and Noncontrolling Interests - Narrative (Details) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2019 USD ($) joint_venture	Dec. 31, 2018 USD ($) joint_venture
Noncontrolling Interest [Line Items]
Number of joint ventures \| joint_venture	23	20
Consolidated variable interest entities, assets	$ 464.6	$ 434.8
Consolidated variable interest entities, liabilities	233.5	209.4
Cash
Noncontrolling Interest [Line Items]
Consolidated variable interest entities, assets	11.0	9.0
Real estate
Noncontrolling Interest [Line Items]
Consolidated variable interest entities, assets	$ 430.1	$ 422.7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=118582676&loc=d3e5710-111685

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- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

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- Definition

Number Of Joint Ventures Formed

+ References

No definition available.

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