CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
FROM OPERATIONS
Investment income, net	$ 166.0	$ 153.0	$ 305.2	$ 274.7
Net realized gain (loss) on investments	8.5	6.5	(4.1)	28.8
Net change in unrealized appreciation on investments and mortgage loans payable	23.8	138.0	171.5	417.8
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	198.3	297.5	472.6	721.3
FROM PARTICIPANT TRANSACTIONS
Premiums	648.7	833.2	1,428.2	1,591.4
Annuity payments	(10.6)	(10.1)	(21.5)	(20.0)
Withdrawals and death benefits	(675.2)	(472.3)	(1,375.1)	(974.5)
NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM PARTICIPANT TRANSACTIONS	(37.1)	350.8	31.6	596.9
NET INCREASE IN NET ASSETS	161.2	648.3	504.2	1,318.2
NET ASSETS
Beginning of period	24,647.7	23,029.9	24,304.7	22,360.0
End of period	$ 24,808.9	$ 23,678.2	$ 24,808.9	$ 23,678.2