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Real Estate (Real Estate Available and Held for Sale) (Details) - Executed Contract with Third Party $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($) lease_asset	Jun. 30, 2016 USD ($)
Net Lease
Real Estate Properties [Line Items]
Net lease asset transferred | lease_asset	1
Property transferred to held for sale, carrying value	$ 0.9	$ 0.7
Commercial Operating Properties
Real Estate Properties [Line Items]
Property transferred to held for sale, carrying value		$ 16.1

X

- Definition

Number of Real Estate Properties Transferred to Held for Sale

+ References

No definition available.

+ Details

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X

- Definition

Property Transferred to Held for Sale, Aggregate, Carrying Value

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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X

- Details

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