CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES - USD ($) shares in Millions, $ in Millions		Jun. 30, 2019	Dec. 31, 2018
Investments, at fair value:
Real estate properties (cost: $13,384.4 and $12,687.8)		$ 16,471.9	$ 15,531.1
Real estate joint ventures and limited partnerships (cost: $5,588.7 and $5,207.8)		6,919.2	6,532.5
Marketable securities:
Real estate-related (cost: $719.7 and $1,274.7)	[1]	847.2	1,415.1
Other (cost: $4,198.7 and $4,088.9)		4,199.4	4,088.7
Loans receivable (cost: $1,105.5 and $910.6)		1,105.1	913.0
Total investments (cost: $24,997.0 and $24,169.8)		29,542.8	28,480.4
Cash and cash equivalents		8.0	3.8
Due from investment manager		6.4	2.2
Other	[2]	278.0	331.8
TOTAL ASSETS		29,835.2	28,818.2
LIABILITIES
Mortgage loans payable, at fair value (principal outstanding: $2,788.5 and $2,688.1)		2,774.7	2,608.0
Accrued real estate property expenses		235.0	222.4
Payable for collateral for securities loaned		7.1	68.8
Other		85.8	76.4
TOTAL LIABILITIES		3,102.6	2,975.6
COMMITMENTS AND CONTINGENCIES
NET ASSETS
Accumulation Fund		26,201.2	25,320.1
Annuity Fund		531.4	522.5
TOTAL NET ASSETS		$ 26,732.6	$ 25,842.6
NUMBER OF ACCUMULATION UNITS OUTSTANDING (in shares)		60.9	60.7
NET ASSET VALUE, PER ACCUMULATION UNIT (in dollars per share)		$ 430.186	$ 417.416

[1] Includes securities loaned of $6.9 million at June 30, 2019 and $67.4 million at December 31, 2018.

[2] Includes cash collateral for securities loaned of $7.1 million at June 30, 2019 and $68.8 million at December 31, 2018.