CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Real estate income, net:
Rental income	$ 265.3	$ 252.6	$ 523.7	$ 498.5
Real estate property level expenses and taxes:
Operating expenses	52.7	51.1	108.0	108.7
Real estate taxes	41.6	38.4	84.1	76.5
Interest expense	22.3	23.5	44.8	40.9
Total real estate property level expenses and taxes	116.6	113.0	236.9	226.1
Real estate income, net	148.7	139.6	286.8	272.4
Income from real estate joint ventures and limited partnerships	47.5	50.5	93.4	78.3
Interest	12.0	6.5	21.7	11.5
Dividends	8.5	7.5	7.8	10.7
TOTAL INVESTMENT INCOME	216.7	204.1	409.7	372.9
Expenses:
Investment management charges	16.9	19.8	37.4	34.2
Administrative charges	15.7	14.1	31.3	31.4
Distribution charges	6.0	7.4	13.2	14.1
Mortality and expense risk charges	0.3	0.3	0.6	0.6
Liquidity guarantee charges	11.8	9.5	22.0	17.9
TOTAL EXPENSES	50.7	51.1	104.5	98.2
INVESTMENT INCOME, NET	166.0	153.0	305.2	274.7
Net realized gain (loss) on investments:
Real estate properties	0.4	1.8	(16.8)	10.1
Real estate joint ventures and limited partnerships	0.0	0.2	0.0	0.2
Marketable securities	8.1	4.5	12.7	18.5
Net realized gain (loss) on investments	8.5	6.5	(4.1)	28.8
Net change in unrealized appreciation (depreciation) on:
Real estate properties	32.4	113.0	84.2	205.3
Real estate joint ventures and limited partnerships	0.8	(17.8)	61.8	128.0
Marketable securities	8.7	66.9	32.0	110.2
Mortgage loans payable	(18.1)	(24.1)	(6.5)	(25.7)
Net change in unrealized appreciation on investments and mortgage loans payable	23.8	138.0	171.5	417.8
NET REALIZED AND UNREALIZED GAIN ON INVESTMENTS AND MORTGAGE LOANS PAYABLE	32.3	144.5	167.4	446.6
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$ 198.3	$ 297.5	$ 472.6	$ 721.3