Schedule III - Real Estate and Accumulated Depreciation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) a Unit	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,655.3
Initial Cost
Land	1,378.6
Building & Improvements	3,865.4
Costs Capitalized Subsequent to Acquisition
Improvements	469.5
Gross Balance at December 31, 2016
Land	1,330.6
Building & Improvements	4,099.9
Total	5,430.5	$ 5,981.7	$ 6,578.6	$ 5,805.4
Accumulated Depreciation	(466.8)	$ (406.5)	$ (344.0)	$ (230.3)
Aggregate tax basis of all properties	5,224.7
Southern California [Member] | Commercial [Member] | Office, Constructed 1955, 1981, 1982 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	35.0
Initial Cost
Land	11.2
Building & Improvements	18.5
Costs Capitalized Subsequent to Acquisition
Improvements	34.6
Gross Balance at December 31, 2016
Land	11.5
Building & Improvements	54.1
Total	65.6
Accumulated Depreciation	$ (6.1)
Depreciable Life in Years	39 years
Southern California [Member] | Commercial [Member] | Retail, Constructed 1985 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 27.0
Initial Cost
Land	9.1
Building & Improvements	14.0
Costs Capitalized Subsequent to Acquisition
Improvements	11.7
Gross Balance at December 31, 2016
Land	9.1
Building & Improvements	25.7
Total	34.8
Accumulated Depreciation	$ (2.9)
Depreciable Life in Years	39 years
Southern California [Member] | Commercial [Member] | Office, Constructed 1982 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 49.5
Initial Cost
Land	37.8
Building & Improvements	60.5
Costs Capitalized Subsequent to Acquisition
Improvements	13.1
Gross Balance at December 31, 2016
Land	37.8
Building & Improvements	73.6
Total	111.4
Accumulated Depreciation	$ (9.4)
Depreciable Life in Years	39 years
Southern California [Member] | Commercial [Member] | Office, Constructed 1968 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 28.8
Initial Cost
Land	11.6
Building & Improvements	36.5
Costs Capitalized Subsequent to Acquisition
Improvements	4.5
Gross Balance at December 31, 2016
Land	11.6
Building & Improvements	40.9
Total	52.5
Accumulated Depreciation	$ (5.9)
Depreciable Life in Years	39 years
Southern California [Member] | Commercial [Member] | Office 2, Constructed 1982 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 35.0
Initial Cost
Land	20.7
Building & Improvements	47.9
Costs Capitalized Subsequent to Acquisition
Improvements	25.8
Gross Balance at December 31, 2016
Land	20.7
Building & Improvements	53.9
Total	74.6
Accumulated Depreciation	$ (6.6)
Depreciable Life in Years	39 years
Southern California [Member] | Commercial [Member] | Office Constructed 1956 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 16.0
Initial Cost
Land	27.4
Building & Improvements	6.8
Costs Capitalized Subsequent to Acquisition
Improvements	1.4
Gross Balance at December 31, 2016
Land	27.4
Building & Improvements	8.3
Total	35.7
Accumulated Depreciation	$ (0.3)
Depreciable Life in Years	39 years
Southern California [Member] | Multifamily [Member] | 208-Unit Multifamily Building, Constructed 2004 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 37.7
Initial Cost
Land	9.3
Building & Improvements	37.3
Costs Capitalized Subsequent to Acquisition
Improvements	5.0
Gross Balance at December 31, 2016
Land	9.3
Building & Improvements	42.3
Total	51.6
Accumulated Depreciation	$ (6.6)
Depreciable Life in Years	39 years
Number of units | Unit	208
Southern California [Member] | Multifamily [Member] | 460-Unit Multifamily Building, Constructed 1988 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 46.7
Initial Cost
Land	13.2
Building & Improvements	53.0
Costs Capitalized Subsequent to Acquisition
Improvements	4.5
Gross Balance at December 31, 2016
Land	13.2
Building & Improvements	57.5
Total	70.7
Accumulated Depreciation	$ (7.7)
Depreciable Life in Years	39 years
Number of units | Unit	460
Southern California [Member] | Multifamily [Member] | 386-Unit Multifamily Building, Constructed 2002 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 66.0
Initial Cost
Land	0.0
Building & Improvements	81.4
Costs Capitalized Subsequent to Acquisition
Improvements	7.8
Gross Balance at December 31, 2016
Land	0.0
Building & Improvements	89.3
Total	89.3
Accumulated Depreciation	$ (8.5)
Depreciable Life in Years	39 years
Number of units | Unit	386
Southern California [Member] | Multifamily [Member] | 157-Unit Multifamily Building, Constructed 2013 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 42.9
Initial Cost
Land	14.5
Building & Improvements	46.0
Costs Capitalized Subsequent to Acquisition
Improvements	1.1
Gross Balance at December 31, 2016
Land	14.5
Building & Improvements	47.1
Total	61.6
Accumulated Depreciation	$ (4.2)
Depreciable Life in Years	39 years
Number of units | Unit	157
Southern California [Member] | Multifamily [Member] | Land 1 Acquired 2018 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.6
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	3.6
Building & Improvements	0.0
Total	3.6
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1981 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 1.3
Initial Cost
Land	0.5
Building & Improvements	1.2
Costs Capitalized Subsequent to Acquisition
Improvements	0.4
Gross Balance at December 31, 2016
Land	0.5
Building & Improvements	1.6
Total	2.1
Accumulated Depreciation	$ (0.2)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1958, 1974-1976, 1985, 1989, 2006 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10.2
Initial Cost
Land	2.1
Building & Improvements	2.9
Costs Capitalized Subsequent to Acquisition
Improvements	1.8
Gross Balance at December 31, 2016
Land	1.8
Building & Improvements	4.7
Total	6.5
Accumulated Depreciation	$ (0.5)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1980, 1983 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4.6
Initial Cost
Land	2.6
Building & Improvements	5.6
Costs Capitalized Subsequent to Acquisition
Improvements	1.2
Gross Balance at December 31, 2016
Land	2.6
Building & Improvements	6.8
Total	9.4
Accumulated Depreciation	$ (1.0)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1961 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7.0
Initial Cost
Land	2.6
Building & Improvements	9.5
Costs Capitalized Subsequent to Acquisition
Improvements	3.0
Gross Balance at December 31, 2016
Land	2.6
Building & Improvements	12.4
Total	15.0
Accumulated Depreciation	$ (0.9)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1984, 2008 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 28.6
Initial Cost
Land	9.3
Building & Improvements	30.0
Costs Capitalized Subsequent to Acquisition
Improvements	1.0
Gross Balance at December 31, 2016
Land	9.3
Building & Improvements	31.0
Total	40.3
Accumulated Depreciation	$ (2.7)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1995, 1996 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4.3
Initial Cost
Land	1.3
Building & Improvements	5.6
Costs Capitalized Subsequent to Acquisition
Improvements	0.5
Gross Balance at December 31, 2016
Land	1.3
Building & Improvements	6.1
Total	7.4
Accumulated Depreciation	$ (0.5)
Depreciable Life in Years	39 years
Mountain States [Member] | Commercial [Member] | Retail, Constructed 1967 and 1983 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 12.3
Initial Cost
Land	4.1
Building & Improvements	12.2
Costs Capitalized Subsequent to Acquisition
Improvements	0.1
Gross Balance at December 31, 2016
Land	4.1
Building & Improvements	12.3
Total	16.4
Accumulated Depreciation	$ (0.8)
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | 450-unit Multifamily Building, Constructed 1974 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 45.2
Initial Cost
Land	18.4
Building & Improvements	43.0
Costs Capitalized Subsequent to Acquisition
Improvements	6.7
Gross Balance at December 31, 2016
Land	18.4
Building & Improvements	49.7
Total	68.1
Accumulated Depreciation	$ (11.3)
Depreciable Life in Years	39 years
Number of units | Unit	450
Mountain States [Member] | Multifamily [Member] | 366-unit Apartment building, Constructed 2000 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 53.3
Initial Cost
Land	9.1
Building & Improvements	36.3
Costs Capitalized Subsequent to Acquisition
Improvements	10.4
Gross Balance at December 31, 2016
Land	9.1
Building & Improvements	46.7
Total	55.8
Accumulated Depreciation	$ (13.0)
Depreciable Life in Years	39 years
Number of units | Unit	366
Mountain States [Member] | Multifamily [Member] | 324-Unit Multifamily Building, Constructed 1996 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 25.3
Initial Cost
Land	3.2
Building & Improvements	28.5
Costs Capitalized Subsequent to Acquisition
Improvements	6.7
Gross Balance at December 31, 2016
Land	3.2
Building & Improvements	35.2
Total	38.4
Accumulated Depreciation	$ (6.7)
Depreciable Life in Years	39 years
Number of units | Unit	324
Mountain States [Member] | Multifamily [Member] | 204-Unit Multifamily Building, Constructed 1999 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14.3
Initial Cost
Land	2.0
Building & Improvements	17.6
Costs Capitalized Subsequent to Acquisition
Improvements	2.6
Gross Balance at December 31, 2016
Land	2.0
Building & Improvements	20.3
Total	22.3
Accumulated Depreciation	$ (2.3)
Depreciable Life in Years	39 years
Number of units | Unit	204
Mountain States [Member] | Multifamily [Member] | 168-Unit Multifamily Building, Constructed 1992 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10.9
Initial Cost
Land	1.8
Building & Improvements	13.1
Costs Capitalized Subsequent to Acquisition
Improvements	2.2
Gross Balance at December 31, 2016
Land	1.8
Building & Improvements	15.2
Total	17.0
Accumulated Depreciation	$ (1.9)
Depreciable Life in Years	39 years
Number of units | Unit	168
Mountain States [Member] | Multifamily [Member] | Land 1 Acquired 2018 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3.8
Initial Cost
Land	5.7
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	20.0
Building & Improvements	0.0
Total	20.0
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | 300-Unit Multifamily Building, Constructed 1995 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22.0
Initial Cost
Land	4.8
Building & Improvements	29.2
Costs Capitalized Subsequent to Acquisition
Improvements	4.2
Gross Balance at December 31, 2016
Land	4.8
Building & Improvements	33.4
Total	38.2
Accumulated Depreciation	$ (2.3)
Depreciable Life in Years	39 years
Number of units | Unit	300
Mountain States [Member] | Multifamily [Member] | 200-Unit Multifamily Building, Constructed 2012 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 20.7
Initial Cost
Land	1.4
Building & Improvements	25.9
Costs Capitalized Subsequent to Acquisition
Improvements	0.6
Gross Balance at December 31, 2016
Land	1.4
Building & Improvements	26.5
Total	27.9
Accumulated Depreciation	$ (1.6)
Depreciable Life in Years	39 years
Number of units | Unit	200
Mountain States [Member] | Multifamily [Member] | 88-Unit Multifamily Building Constructed 1988 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 8.6
Initial Cost
Land	2.6
Building & Improvements	10.4
Costs Capitalized Subsequent to Acquisition
Improvements	1.0
Gross Balance at December 31, 2016
Land	2.6
Building & Improvements	11.4
Total	14.0
Accumulated Depreciation	$ (0.7)
Depreciable Life in Years	39 years
Number of units | Unit	88
Mountain States [Member] | Multifamily [Member] | 492-Unit Multifamily Building Constructed 1985 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 59.1
Initial Cost
Land	15.8
Building & Improvements	63.2
Costs Capitalized Subsequent to Acquisition
Improvements	4.2
Gross Balance at December 31, 2016
Land	15.9
Building & Improvements	67.4
Total	83.3
Accumulated Depreciation	$ (3.7)
Depreciable Life in Years	39 years
Number of units | Unit	492
Mountain States [Member] | Multifamily [Member] | 293-Unit Multifamily Building Constructed 1995 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 19.9
Initial Cost
Land	7.2
Building & Improvements	28.8
Costs Capitalized Subsequent to Acquisition
Improvements	0.5
Gross Balance at December 31, 2016
Land	7.2
Building & Improvements	29.3
Total	36.5
Accumulated Depreciation	$ (1.1)
Depreciable Life in Years	39 years
Number of units | Unit	293
Mountain States [Member] | Multifamily [Member] | 188-Unit Multifamily Building Constructed 1985 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 13.5
Initial Cost
Land	4.9
Building & Improvements	20.0
Costs Capitalized Subsequent to Acquisition
Improvements	4.8
Gross Balance at December 31, 2016
Land	4.9
Building & Improvements	24.5
Total	29.4
Accumulated Depreciation	$ (0.9)
Depreciable Life in Years	39 years
Number of units | Unit	188
Mountain States [Member] | Multifamily [Member] | 222-Unit Multifamily Building Constructed 1996 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 28.8
Initial Cost
Land	9.6
Building & Improvements	38.6
Costs Capitalized Subsequent to Acquisition
Improvements	1.0
Gross Balance at December 31, 2016
Land	9.6
Building & Improvements	39.5
Total	49.1
Accumulated Depreciation	$ (1.1)
Depreciable Life in Years	39 years
Number of units | Unit	222
Mountain States [Member] | Multifamily [Member] | Land 2 Acquired 2018 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.8
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	4.8
Building & Improvements	0.0
Total	4.8
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | Land 3 Acquired 2018 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	2.1
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	2.5
Building & Improvements	0.0
Total	2.5
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | Land 4 Acquired 2018 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.2
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.6
Building & Improvements	0.0
Total	0.6
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | Land 1 Acquired 2019 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.0
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.9
Building & Improvements	0.0
Total	0.9
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | Land 2 Acquired 2019 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.0
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.2
Building & Improvements	0.0
Total	0.2
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | Land 3 Acquired 2019 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	4.0
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	18.4
Building & Improvements	0.0
Total	18.4
Accumulated Depreciation
Depreciable Life in Years	39 years
Mountain States [Member] | Multifamily [Member] | 360-Unit Multifamily Building Constructed 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 52.8
Initial Cost
Land	16.4
Building & Improvements	65.7
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	16.4
Building & Improvements	65.7
Total	82.1
Accumulated Depreciation	$ (0.1)
Depreciable Life in Years	39 years
Number of units | Unit	360
Northern California [Member] | Commercial [Member] | Office Constructed 2000 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 61.8
Initial Cost
Land	23.5
Building & Improvements	57.3
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	23.5
Building & Improvements	57.3
Total	80.8
Accumulated Depreciation	$ (0.3)
Depreciable Life in Years	39 years
Northern California [Member] | Multifamily [Member] | 178-unit Apartment building, Constructed 1975 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 31.4
Initial Cost
Land	12.3
Building & Improvements	18.5
Costs Capitalized Subsequent to Acquisition
Improvements	9.0
Gross Balance at December 31, 2016
Land	12.3
Building & Improvements	27.4
Total	39.7
Accumulated Depreciation	$ (8.6)
Depreciable Life in Years	39 years
Number of units | Unit	178
Northern California [Member] | Multifamily [Member] | 542-Unit Multifamily Building, Constructed, 1987 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 90.8
Initial Cost
Land	38.3
Building & Improvements	57.5
Costs Capitalized Subsequent to Acquisition
Improvements	9.7
Gross Balance at December 31, 2016
Land	38.3
Building & Improvements	67.3
Total	105.6
Accumulated Depreciation	$ (13.0)
Depreciable Life in Years	39 years
Number of units | Unit	542
Northern California [Member] | Multifamily [Member] | 1,008-Unit Multifamily Building, Constructed 1988 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 175.0
Initial Cost
Land	62.7
Building & Improvements	152.4
Costs Capitalized Subsequent to Acquisition
Improvements	19.3
Gross Balance at December 31, 2016
Land	62.3
Building & Improvements	171.7
Total	234.0
Accumulated Depreciation	$ (24.3)
Depreciable Life in Years	39 years
Number of units | Unit	1,008
United Kingdom [Member] | Commercial [Member] | Commercial Portfolio 1, Acquired 2014 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	30.9
Building & Improvements	80.9
Costs Capitalized Subsequent to Acquisition
Improvements	18.2
Gross Balance at December 31, 2016
Land	24.9
Building & Improvements	82.5
Total	107.4
Accumulated Depreciation	$ (12.6)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Commercial Portfolio 2, Acquired 2014 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 33.2
Initial Cost
Land	79.8
Building & Improvements	294.3
Costs Capitalized Subsequent to Acquisition
Improvements	17.5
Gross Balance at December 31, 2016
Land	57.7
Building & Improvements	239.3
Total	297.0
Accumulated Depreciation	$ (37.8)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Office, Constructed 2003 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	85.3
Building & Improvements	232.0
Costs Capitalized Subsequent to Acquisition
Improvements	20.3
Gross Balance at December 31, 2016
Land	71.3
Building & Improvements	214.2
Total	285.5
Accumulated Depreciation	$ (36.5)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Retail, Constructed 2010 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 70.4
Initial Cost
Land	6.2
Building & Improvements	109.5
Costs Capitalized Subsequent to Acquisition
Improvements	7.2
Gross Balance at December 31, 2016
Land	5.0
Building & Improvements	94.7
Total	99.7
Accumulated Depreciation	$ (13.1)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Commercial Portfolio 1, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 308.2
Initial Cost
Land	181.6
Building & Improvements	286.0
Costs Capitalized Subsequent to Acquisition
Improvements	14.3
Gross Balance at December 31, 2016
Land	151.0
Building & Improvements	248.3
Total	399.3
Accumulated Depreciation	$ (30.3)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Office Portfolio, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	32.9
Building & Improvements	65.8
Costs Capitalized Subsequent to Acquisition
Improvements	11.8
Gross Balance at December 31, 2016
Land	34.7
Building & Improvements	60.5
Total	95.2
Accumulated Depreciation	$ (5.9)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Industrial, Constructed 1984, 2003 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	6.9
Building & Improvements	8.8
Costs Capitalized Subsequent to Acquisition
Improvements	0.3
Gross Balance at December 31, 2016
Land	8.5
Building & Improvements	7.4
Total	15.9
Accumulated Depreciation	$ (0.7)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Office Portfolio, Acquired 2016 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	32.1
Building & Improvements	70.4
Costs Capitalized Subsequent to Acquisition
Improvements	1.8
Gross Balance at December 31, 2016
Land	29.4
Building & Improvements	66.1
Total	95.5
Accumulated Depreciation	$ (6.1)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Industrial, Constructed 2002 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	5.0
Building & Improvements	9.2
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	5.2
Building & Improvements	9.6
Total	14.8
Accumulated Depreciation	$ (0.7)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Office, Constructed 1997 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 66.2
Initial Cost
Land	25.2
Building & Improvements	27.8
Costs Capitalized Subsequent to Acquisition
Improvements	1.0
Gross Balance at December 31, 2016
Land	23.5
Building & Improvements	32.8
Total	56.3
Accumulated Depreciation	$ (0.5)
Depreciable Life in Years	39 years
United Kingdom [Member] | Commercial [Member] | Industrial, Constructed 1990, 2010 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10.3
Initial Cost
Land	3.8
Building & Improvements	11.5
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	3.9
Building & Improvements	11.8
Total	15.7
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
United Kingdom [Member] | Multifamily [Member] | 294-Unit Multifamily Building, Constructed 2012 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	22.1
Building & Improvements	84.0
Costs Capitalized Subsequent to Acquisition
Improvements	16.9
Gross Balance at December 31, 2016
Land	19.9
Building & Improvements	92.5
Total	112.4
Accumulated Depreciation	$ (8.2)
Depreciable Life in Years	39 years
Number of units | Unit	294
United Kingdom [Member] | Development [Member] | Land Acquired 2016 [Member]
Initial Cost
Land	$ 4.2
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	4.0
Building & Improvements	0.3
Total	4.3
Accumulated Depreciation	0.0
Ireland [Member] | Commercial [Member] | Office, Acquired 2014 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0.0
Initial Cost
Land	2.0
Building & Improvements	4.4
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	1.3
Building & Improvements	5.6
Total	6.9
Accumulated Depreciation	$ (0.7)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 1973 And 2016 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	13.9
Building & Improvements	21.9
Costs Capitalized Subsequent to Acquisition
Improvements	0.3
Gross Balance at December 31, 2016
Land	11.5
Building & Improvements	67.0
Total	78.5
Accumulated Depreciation	$ (6.4)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 2003 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 79.0
Initial Cost
Land	8.2
Building & Improvements	102.6
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	6.7
Building & Improvements	84.6
Total	91.3
Accumulated Depreciation	$ (11.6)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Retail, Constructed 1966 And 2005 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 97.7
Initial Cost
Land	59.8
Building & Improvements	83.1
Costs Capitalized Subsequent to Acquisition
Improvements	25.0
Gross Balance at December 31, 2016
Land	49.4
Building & Improvements	93.6
Total	143.0
Accumulated Depreciation	$ (8.9)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 1980 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 76.9
Initial Cost
Land	20.4
Building & Improvements	73.8
Costs Capitalized Subsequent to Acquisition
Improvements	3.7
Gross Balance at December 31, 2016
Land	16.8
Building & Improvements	64.6
Total	81.4
Accumulated Depreciation	$ (10.2)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office Portfolio, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.8
Building & Improvements	5.9
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.8
Building & Improvements	6.1
Total	6.9
Accumulated Depreciation	$ (0.6)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office Building, Constructed 2007 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	2.0
Building & Improvements	11.9
Costs Capitalized Subsequent to Acquisition
Improvements	0.1
Gross Balance at December 31, 2016
Land	2.0
Building & Improvements	12.2
Total	14.2
Accumulated Depreciation	$ (1.2)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 2009, Acquired 2016 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	4.2
Building & Improvements	64.0
Costs Capitalized Subsequent to Acquisition
Improvements	1.8
Gross Balance at December 31, 2016
Land	4.1
Building & Improvements	64.2
Total	68.3
Accumulated Depreciation	$ (5.7)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 1841 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	4.9
Building & Improvements	18.5
Costs Capitalized Subsequent to Acquisition
Improvements	11.3
Gross Balance at December 31, 2016
Land	4.6
Building & Improvements	28.9
Total	33.5
Accumulated Depreciation	$ (0.6)
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office, Constructed 1840 and 2000 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 11.6
Initial Cost
Land	11.0
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	19.0
Gross Balance at December 31, 2016
Land	10.5
Building & Improvements	19.0
Total	29.5
Accumulated Depreciation	$ 0.0
Depreciable Life in Years	39 years
Ireland [Member] | Commercial [Member] | Office Constructed 2009 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 50.6
Initial Cost
Land	7.2
Building & Improvements	31.7
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	7.3
Building & Improvements	32.5
Total	39.8
Accumulated Depreciation	$ (0.2)
Depreciable Life in Years	39 years
Ireland [Member] | Hotel [Member] | Hotel, Constructed 1824, 2005 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 80.8
Initial Cost
Land	54.0
Building & Improvements	114.3
Costs Capitalized Subsequent to Acquisition
Improvements	35.0
Gross Balance at December 31, 2016
Land	46.7
Building & Improvements	136.2
Total	182.9
Accumulated Depreciation	$ (21.7)
Depreciable Life in Years	39 years
Ireland [Member] | Development [Member] | Office, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.5
Building & Improvements	3.4
Costs Capitalized Subsequent to Acquisition
Improvements	6.7
Gross Balance at December 31, 2016
Land	0.5
Building & Improvements	16.4
Total	16.9
Accumulated Depreciation	0.0
Ireland [Member] | Development [Member] | Retail Acquired 2017 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0.0
Initial Cost
Land	17.2
Building & Improvements	0.0
Costs Capitalized Subsequent to Acquisition
Improvements	2.8
Gross Balance at December 31, 2016
Land	17.1
Building & Improvements	2.8
Total	19.9
Accumulated Depreciation	0.0
Spain [Member] | Commercial [Member] | Retail Portfolio, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0.0
Initial Cost
Land	2.4
Building & Improvements	6.6
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	2.4
Building & Improvements	6.8
Total	9.2
Accumulated Depreciation	$ (0.7)
Depreciable Life in Years	39 years
Spain [Member] | Commercial [Member] | Retail, Constructed 1995 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 40.3
Initial Cost
Land	27.1
Building & Improvements	46.2
Costs Capitalized Subsequent to Acquisition
Improvements	12.7
Gross Balance at December 31, 2016
Land	29.8
Building & Improvements	63.4
Total	93.2
Accumulated Depreciation	$ (5.5)
Depreciable Life in Years	39 years
Spain [Member] | Development [Member] | Retail, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.0
Building & Improvements	34.7
Costs Capitalized Subsequent to Acquisition
Improvements	10.5
Gross Balance at December 31, 2016
Land	0.0
Building & Improvements	44.2
Total	44.2
Accumulated Depreciation	0.0
Spain [Member] | Development [Member] | Retail Acquired 2017 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0.0
Initial Cost
Land	0.0
Building & Improvements	13.8
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.0
Building & Improvements	13.9
Total	13.9
Accumulated Depreciation	0.0
Italy [Member] | Commercial [Member] | Office Portfolio, Acquired 2015 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0.0
Initial Cost
Land	26.3
Building & Improvements	74.8
Costs Capitalized Subsequent to Acquisition
Improvements	0.6
Gross Balance at December 31, 2016
Land	32.5
Building & Improvements	92.9
Total	125.4
Accumulated Depreciation	$ (9.3)
Depreciable Life in Years	39 years
Pacific Northwest [Member] | Commercial [Member] | Retail Constructed 1956 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7.2
Initial Cost
Land	2.3
Building & Improvements	8.1
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	2.3
Building & Improvements	8.1
Total	10.4
Accumulated Depreciation	$ (0.6)
Depreciable Life in Years	39 years
Pacific Northwest [Member] | Commercial [Member] | Office, Constructed 1999 and 2001 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 77.0
Initial Cost
Land	30.6
Building & Improvements	106.0
Costs Capitalized Subsequent to Acquisition
Improvements	0.7
Gross Balance at December 31, 2016
Land	30.6
Building & Improvements	106.7
Total	137.3
Accumulated Depreciation	$ (7.0)
Depreciable Life in Years	39 years
Pacific Northwest [Member] | Multifamily [Member] | 217-unit Multifamily property, Constructed 2011 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22.8
Initial Cost
Land	2.6
Building & Improvements	41.4
Costs Capitalized Subsequent to Acquisition
Improvements	3.3
Gross Balance at December 31, 2016
Land	2.5
Building & Improvements	42.5
Total	45.0
Accumulated Depreciation	$ (9.0)
Depreciable Life in Years	39 years
Number of units | Unit	217
Pacific Northwest [Member] | Multifamily [Member] | 203-Unit Multifamily Building, Constructed 2005 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 19.5
Initial Cost
Land	2.6
Building & Improvements	23.8
Costs Capitalized Subsequent to Acquisition
Improvements	2.6
Gross Balance at December 31, 2016
Land	2.6
Building & Improvements	26.4
Total	29.0
Accumulated Depreciation	$ (4.9)
Depreciable Life in Years	39 years
Number of units | Unit	203
Pacific Northwest [Member] | Multifamily [Member] | 280-Unit Multifamily Building, Constructed 2004, 2006 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 37.3
Initial Cost
Land	6.0
Building & Improvements	40.2
Costs Capitalized Subsequent to Acquisition
Improvements	2.3
Gross Balance at December 31, 2016
Land	6.0
Building & Improvements	42.6
Total	48.6
Accumulated Depreciation	$ (6.3)
Depreciable Life in Years	39 years
Number of units | Unit	280
Pacific Northwest [Member] | Multifamily [Member] | 750-Unit Multifamily Building, Constructed 1987 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 82.0
Initial Cost
Land	22.1
Building & Improvements	78.2
Costs Capitalized Subsequent to Acquisition
Improvements	9.2
Gross Balance at December 31, 2016
Land	22.1
Building & Improvements	87.4
Total	109.5
Accumulated Depreciation	$ (15.0)
Depreciable Life in Years	39 years
Number of units | Unit	750
Pacific Northwest [Member] | Multifamily [Member] | Condo, Constructed 2005 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	0.0
Building & Improvements	0.2
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	0.0
Building & Improvements	1.0
Total	1.0
Accumulated Depreciation	$ (0.1)
Depreciable Life in Years	39 years
Pacific Northwest [Member] | Multifamily [Member] | 430-Unit Multifamily Building, Constructed 2006 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 62.5
Initial Cost
Land	12.8
Building & Improvements	67.4
Costs Capitalized Subsequent to Acquisition
Improvements	3.2
Gross Balance at December 31, 2016
Land	12.8
Building & Improvements	70.6
Total	83.4
Accumulated Depreciation	$ (6.8)
Depreciable Life in Years	39 years
Number of units | Unit	430
Pacific Northwest [Member] | Multifamily [Member] | 408-Unit Multifamily Building, Constructed 1998 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 60.4
Initial Cost
Land	9.2
Building & Improvements	83.3
Costs Capitalized Subsequent to Acquisition
Improvements	3.6
Gross Balance at December 31, 2016
Land	9.3
Building & Improvements	86.9
Total	96.2
Accumulated Depreciation	$ (7.5)
Depreciable Life in Years	39 years
Number of units | Unit	408
Pacific Northwest [Member] | Multifamily [Member] | 210-Multifamily Building, Constructed 2007 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 29.0
Initial Cost
Land	11.0
Building & Improvements	46.7
Costs Capitalized Subsequent to Acquisition
Improvements	0.7
Gross Balance at December 31, 2016
Land	11.0
Building & Improvements	47.5
Total	58.5
Accumulated Depreciation	$ (2.9)
Depreciable Life in Years	39 years
Number of units | Unit	210
Pacific Northwest [Member] | Multifamily [Member] | 264-Unit Multifamily Building, Constructed 1997 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 25.3
Initial Cost
Land	6.4
Building & Improvements	44.9
Costs Capitalized Subsequent to Acquisition
Improvements	3.8
Gross Balance at December 31, 2016
Land	6.4
Building & Improvements	48.7
Total	55.1
Accumulated Depreciation	$ (3.1)
Depreciable Life in Years	39 years
Number of units | Unit	264
Pacific Northwest [Member] | Multifamily [Member] | 343-Unit Multifamily Building, Constructed 2016 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 84.0
Initial Cost
Land	26.8
Building & Improvements	107.4
Costs Capitalized Subsequent to Acquisition
Improvements	0.0
Gross Balance at December 31, 2016
Land	26.8
Building & Improvements	107.6
Total	134.4
Accumulated Depreciation	$ (5.8)
Depreciable Life in Years	39 years
Number of units | Unit	343
Pacific Northwest [Member] | Multifamily [Member] | 179-Unit Multifamily Building, Constructed 2013 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 33.0
Initial Cost
Land	11.9
Building & Improvements	47.4
Costs Capitalized Subsequent to Acquisition
Improvements	0.2
Gross Balance at December 31, 2016
Land	11.9
Building & Improvements	48.6
Total	60.5
Accumulated Depreciation	$ (2.6)
Depreciable Life in Years	39 years
Number of units | Unit	179
Hawaii [Member] | Land [Member] | 2700 acres [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0.0
Initial Cost
Land	31.7
Building & Improvements	3.7
Costs Capitalized Subsequent to Acquisition
Improvements	0.7
Gross Balance at December 31, 2016
Land	41.3
Building & Improvements	4.3
Total	45.6
Accumulated Depreciation	$ (1.8)
Area of real estate property (in sq ft) | a	2,700