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Closed Block (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenues      
Closed Block: Premiums and other considerations $ 428.8 $ 459.3 $ 508.6
Closed Block: Net investment income (loss) 238.2 257.6 268.6
Closed Block: Net realized capital gains (losses) 7.9 1.8 (23.5)
Closed Block: Total revenues 674.9 718.7 753.7
Expenses      
Closed Block: Benefits, claims and settlement expenses 370.7 385.5 422.1
Closed Block: Dividends to policyholders 204.2 215.1 235.9
Closed Block: Operating expenses 2.9 6.4 6.8
Closed Block: Total expenses 577.8 607.0 664.8
Closed Block revenues, net of Closed Block expenses, before income taxes 97.1 111.7 88.9
Closed Block: Income taxes (benefits) 31.2 36.2 28.1
Closed Block revenues, net of Closed Block expenses and income taxes 65.9 75.5 60.8
Funding adjustment charges (5.3) (9.6) (6.6)
Closed Block revenues, net of Closed Block expenses, income taxes and funding adjustment charges $ 60.6 $ 65.9 $ 54.2