Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES:
Net income (loss)	$ (109.3)us-gaap_NetIncomeLoss	$ 64.4us-gaap_NetIncomeLoss	$ (139.1)us-gaap_NetIncomeLoss
Net realized investment gains / losses	65.0us-gaap_RealizedInvestmentGainsLosses	3.0us-gaap_RealizedInvestmentGainsLosses	34.0us-gaap_RealizedInvestmentGainsLosses
Policy acquisition costs deferred	(83.7)	(66.7)	(69.8)
Policy acquisition cost amortization	84.9	83.4	100.5
Interest credited	104.7pnx_InterestCredited	91.2pnx_InterestCredited	69.5pnx_InterestCredited
Equity in earnings of limited partnerships and other investments	(2.0)us-gaap_UndistributedEarnings	(0.4)us-gaap_UndistributedEarnings	(0.1)us-gaap_UndistributedEarnings
Change in:
Accrued investment income	(15.4)	(7.4)	(8.5)
Deferred income taxes	(17.3)	0	(10.9)
Reinsurance recoverable	29.7	(44.6)	(12.1)
Policy liabilities and accruals	(186.8)	(261.2)	(51.7)
Due to/from related parties	(9.4)	0.5	(7.5)
Other operating activities, net	56.2	7.3	(69.7)
Cash provided by (used for) operating activities	(83.4)	(130.5)	(165.4)
Purchases of:
Available-for-sale debt securities	(1,056.9)	(977.2)	(852.8)
Available-for-sale equity securities	(17.4)	(8.4)	0
Short-term investments	(704.1)	(324.8)	(574.7)
Derivative instruments	(55.9)	(89.0)	(98.1)
Fair value investments	(0.9)pnx_FairValueOptionInvestments	(21.1)pnx_FairValueOptionInvestments	(5.7)pnx_FairValueOptionInvestments
Sales, repayments and maturities of:
Available-for-sale debt securities	393.8	389.0	438.1
Available-for-sale equity securities	1.0	0	0
Short-term investments	705.4	489.8	425.8
Derivative instruments	84.6	42.9	26.7
Fair value investments	3.9	10.1	12.4
Contributions to limited partnerships and limited liability corporations	(8.9)pnx_ContributionsToLimitedPartnerships	(4.3)pnx_ContributionsToLimitedPartnerships	(2.1)pnx_ContributionsToLimitedPartnerships
Distributions from limited partnerships and limited liability corporations	1.8pnx_DistributionFromLimitedPartnerships	7.8pnx_DistributionFromLimitedPartnerships	0.3pnx_DistributionFromLimitedPartnerships
Policy loans, net	0.3	(2.8)	3.9
Other investing activities, net	(4.0)	0.7	(1.0)
Cash provided by (used for) investing activities	(657.3)	(487.3)	(627.2)
FINANCING ACTIVITIES:
Policyholder deposits	1,005.4us-gaap_AdditionsToContractHoldersFunds	920.8us-gaap_AdditionsToContractHoldersFunds	1,074.7us-gaap_AdditionsToContractHoldersFunds
Policyholder withdrawals	(645.6)	(605.2)	(513.8)
Net transfers to/from separate accounts	347.2pnx_NetTransfersTofromSeparateAccounts	325.1pnx_NetTransfersTofromSeparateAccounts	265.3pnx_NetTransfersTofromSeparateAccounts
Capital contributions from parent	15.0	45.0	0
Debt issued	0	30.0	0
Cash provided by (used for) financing activities	722.0	715.7	826.2
Change in cash and cash equivalents	(18.7)	97.9	33.6
Cash and cash equivalents, beginning of period	181.0	83.1	49.5
Cash and cash equivalents, end of period	162.3	181.0	83.1
Supplemental Disclosure of Cash Flow Information
Income taxes (paid) refunded	28.4us-gaap_IncomeTaxesPaidNet	24.9us-gaap_IncomeTaxesPaidNet	(40.9)us-gaap_IncomeTaxesPaidNet
Interest expense on indebtedness paid	(3.2)us-gaap_InterestPaid	0us-gaap_InterestPaid	0us-gaap_InterestPaid
Non-Cash Transactions During the Period
Investment exchanges	$ 33.7pnx_InvestmentExchanges	$ 33.4pnx_InvestmentExchanges	$ 28.6pnx_InvestmentExchanges

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