Symetra Life Insurance POS AM 29 Mar 19 Prospectus update (post-effective amendment) Financial data

DOCUMENT AND ENTITY INFORMATION

DOCUMENT AND ENTITY INFORMATION	12 Months Ended
	Dec. 31, 2018
Document And Entity Information [Abstract]
Document type	POS AM
Document period end date	Dec. 31, 2018
Amendment flag	false
Registrant name	Symetra Life Insurance Company
Central index key	0001559495
Entity filer category	Non-accelerated Filer

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fixed Maturities:
Available-for-sale, at fair value (amortized cost: $30,654.7 and $29,599.2, respectively)	$ 30,179.3	$ 30,281.3
Trading securities, at fair value	1,095.8	0
Marketable equity securities, at fair value	97.7	755.7
Mortgage loans, net	6,485.1	6,241.2
Policy loans and other invested assets	74.7	54.5
Investments in limited partnerships	130.1	173
Derivatives, at fair value	178.9	339.1
Total investments	38,241.6	37,844.8
Cash and cash equivalents	227.3	347.5
Accrued investment income	328.7	335.2
Reinsurance recoverables	6,228.8	318.2
DAC and VOBA	1,023	696.2
Receivables and other assets	244.3	216.3
Other intangible assets, net	1,170.7	1,254.9
Goodwill	563	563
Deferred income tax assets, net	29.8	0
Separate account assets	904.3	978.1
Total assets	48,961.5	42,554.2
LIABILITIES AND STOCKHOLDER'S EQUITY
Funds held under deposit contracts	37,404.5	35,345.9
Future policy benefits	523.2	498.8
Policy and contract claims	203	196.6
Other policyholders' funds	149.3	117.9
Funds withheld liability	5,589.9	0
Deferred income tax liabilities, net	0	251.1
Other liabilities	476.5	601.3
Separate account liabilities	904.3	978.1
Total liabilities	45,250.7	37,989.7
Commitments and contingencies (Note 11)
Common stock, $250 par value; 20,000 shares authorized, issued, and outstanding	5	5
Additional paid-in capital	3,867.5	3,867.5
Retained earnings	159	140.9
Accumulated other comprehensive income (loss), net of taxes	(320.7)	551.1
Total stockholder's equity	3,710.8	4,564.5
Total liabilities and stockholder's equity	$ 48,961.5	$ 42,554.2

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 30,654.7	$ 29,599.2
Common stock par value (in usd per share)	$ 250	$ 250
Common shares authorized (in shares)	20,000	20,000
Common shares issued (in shares)	20,000	20,000
Common shares outstanding (in shares)	20,000	20,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Premiums		$ 717.5	$ 1,013.3	$ 899.5
Net investment income		1,101.3	1,205.8	1,284.1
Policy fees, contract charges, and other		220.1	312.3	272.7
Net realized gains (losses):
Total other-than-temporary impairment losses on securities		10.6	9	6.5
Less: portion recognized in other comprehensive income		(0.1)	1.2	0.1
Net impairment losses on securities recognized in earnings		(10.7)	(7.8)	(6.4)
Other net realized gains (losses)		(99.6)	(242.4)	8.3
Net realized gains (losses)		(110.3)	(250.2)	1.9
Total revenues		1,928.6	2,281.2	2,458.2
Benefits and expenses:
Policyholder benefits and claims		568.8	876.4	758.7
Interest credited		867.8	858.3	973.6
Other underwriting and operating expenses		406.6	492.8	452.5
Amortization of DAC and VOBA		59.7	91.7	74.3
Amortization of intangible assets		77.4	84.5	84.4
Total benefits and expenses		1,980.3	2,403.7	2,343.5
Income (loss) from operations before income taxes		(51.7)	(122.5)	114.7
Provision (benefit) for income taxes:
Current		19.1	3.2	9
Deferred		(89.6)	(79.5)	(154.4)
Total provision (benefit) for income taxes		(70.5)	(76.3)	(145.4)
Net income (loss)		$ 18.8	$ (46.2)	$ 260.1
Predecessor Company
Revenues:
Premiums	$ 61.2
Net investment income	109.7
Policy fees, contract charges, and other	18.3
Net realized gains (losses):
Total other-than-temporary impairment losses on securities	3.8
Less: portion recognized in other comprehensive income	0
Net impairment losses on securities recognized in earnings	(3.8)
Other net realized gains (losses)	(23.1)
Net realized gains (losses)	(26.9)
Total revenues	162.3
Benefits and expenses:
Policyholder benefits and claims	48.4
Interest credited	84.9
Other underwriting and operating expenses	33
Amortization of DAC and VOBA	8.6
Amortization of intangible assets	0.2
Total benefits and expenses	175.1
Income (loss) from operations before income taxes	(12.8)
Provision (benefit) for income taxes:
Current	(24.2)
Deferred	15.3
Total provision (benefit) for income taxes	(8.9)
Net income (loss)	$ (3.9)

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Net income (loss)		$ 18.8	$ (46.2)	$ 260.1
Other comprehensive income (loss), net of taxes and reclassification adjustments:
Changes in unrealized gains (losses) on available-for-sale securities (net of taxes of: 2018 $(251.2); 2017 $190.4; 2016 Successor $74.1; 2016 Predecessor $61.0)		137.7	(945.1)	411.5
Other-than-temporary impairments on fixed maturities not related to credit losses (net of taxes of: 2018 $(0.3); 2017 $0.0; 2016 Successor $(0.1); 2016 Predecessor $0.0)		(0.3)	(0.9)	(0.1)
Impact of net unrealized (gains) losses on DAC and VOBA (net of taxes of: 2018 $39.8; 2017 $(17.0); 2016 Successor $(7.5); 2016 Predecessor $(13.1))		(14)	149.6	(41.9)
Impact of cash flow hedges (net of taxes of: 2018 $10.3; 2017 $(21.2); 2016 Successor $9.5; 2016 Predecessor $13.6)		17.7	38.9	(41.1)
Other comprehensive income (loss)		141.1	(757.5)	328.4
Total comprehensive income (loss)		$ 159.9	$ (803.7)	$ 588.5
Predecessor Company
Net income (loss)	$ (3.9)
Other comprehensive income (loss), net of taxes and reclassification adjustments:
Changes in unrealized gains (losses) on available-for-sale securities (net of taxes of: 2018 $(251.2); 2017 $190.4; 2016 Successor $74.1; 2016 Predecessor $61.0)	113.3
Other-than-temporary impairments on fixed maturities not related to credit losses (net of taxes of: 2018 $(0.3); 2017 $0.0; 2016 Successor $(0.1); 2016 Predecessor $0.0)	0
Impact of net unrealized (gains) losses on DAC and VOBA (net of taxes of: 2018 $39.8; 2017 $(17.0); 2016 Successor $(7.5); 2016 Predecessor $(13.1))	(24.4)
Impact of cash flow hedges (net of taxes of: 2018 $10.3; 2017 $(21.2); 2016 Successor $9.5; 2016 Predecessor $13.6)	25.2
Other comprehensive income (loss)	114.1
Total comprehensive income (loss)	$ 110.2

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Changes in unrealized gains (losses) on available-for-sale securities, tax		$ 74.1	$ (251.2)	$ 190.4
Other-than-temporary impairments on fixed maturities not related to credit losses, tax		(0.1)	(0.3)	0
Impact of net unrealized (gains) losses on DAC and VOBA, tax		(7.5)	39.8	(17)
Impact of cash flow hedges, tax		$ 9.5	$ 10.3	$ (21.2)
Predecessor Company
Changes in unrealized gains (losses) on available-for-sale securities, tax	$ 61
Other-than-temporary impairments on fixed maturities not related to credit losses, tax	0
Impact of net unrealized (gains) losses on DAC and VOBA, tax	(13.1)
Impact of cash flow hedges, tax	$ 13.6

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDER'S EQUITY - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Stockholders' equity, beginning balance (Predecessor Company) at Dec. 31, 2015	$ 3,156,200,000	$ 5,000,000	$ 1,653,000,000	$ 980,100,000	$ 518,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) | Predecessor Company	(3,900,000)	0	0	(3,900,000)	0
Other comprehensive income (loss) | Predecessor Company	114,100,000	0	0	0	114,100,000
Capital contributions | Predecessor Company	400,000	0	400,000	0	0
Stockholders' equity, ending balance (Predecessor Company) at Jan. 31, 2016	3,266,800,000	5,000,000	1,653,400,000	976,200,000	632,200,000
Stockholders' equity, ending balance at Jan. 31, 2016	3,946,100,000	5,000,000	3,941,100,000	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	18,800,000	0	0	18,800,000	0
Other comprehensive income (loss)	141,100,000	0	0	0	141,100,000
Dividends declared	(80,000,000)	0	(53,700,000)	(26,300,000)	0
Stockholders' equity, ending balance at Dec. 31, 2016	4,026,000,000	5,000,000	3,887,400,000	(7,500,000)	141,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	260,100,000	0	0	260,100,000	0
Other comprehensive income (loss)	328,400,000	0	0	0	328,400,000
Dividends declared	(50,000,000)	0	(19,900,000)	(30,100,000)	0
Adoption of new accounting standard	0	0	0	(81,600,000)	81,600,000
Stockholders' equity, ending balance at Dec. 31, 2017	4,564,500,000	5,000,000	3,867,500,000	140,900,000	551,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(46,200,000)	0	0		0
Other comprehensive income (loss)	(757,500,000)	0	0	0
Dividends declared	(50,000,000)	0	0	(50,000,000)	0
Adoption of new accounting standard	0	0	0	114,300,000	(114,300,000)
Stockholders' equity, ending balance at Dec. 31, 2018	$ 3,710,800,000	$ 5,000,000	$ 3,867,500,000	$ 159,000,000	$ (320,700,000)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)		$ 18.8	$ (46.2)	$ 260.1
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized (gains) losses		110.3	250.2	(1.9)
Accretion and amortization of invested assets, net		292.9	233.6	295.2
Amortization of intangible assets		77.4	84.5	84.4
Deferred income tax provision (benefit)		(89.6)	(79.5)	(154.4)
Interest credited on deposit contracts		867.8	858.3	973.6
Mortality and expense charges and administrative fees		(175.2)	(275.4)	(239)
Payment at inception of reinsurance transaction		0	(360)	0
Other changes in:
DAC and VOBA		(155.6)	(168.9)	(165.6)
Future policy benefits		17.8	40	28.9
Other policyholder reserves		47.1	35.5	84.3
Policy and contract claims		8.6	6.4	43.8
Funds withheld liability		0	(142.3)	0
Other assets and liabilities		10	176.6	(78)
Other, net		6.1	(6.2)	(6.1)
Total adjustments		1,017.6	652.8	865.2
Net cash provided by (used in) operating activities		1,036.4	606.6	1,125.3
Purchases of:
Fixed maturities – available-for-sale		(5,294)	(7,753)	(6,759)
Fixed maturities – trading		0	(1,116.8)	0
Marketable equity securities		(114.5)	(293)	(168.8)
Derivatives and other investments		(133.6)	(234.2)	(177.9)
Issuances of mortgage loans		(1,046.1)	(865.1)	(1,019.1)
Sales of fixed maturities – available-for-sale		1,672	3,293.5	2,512.3
Sales of fixed maturities – trading		0	780.5	0
Sales of marketable equity securities		0	938	229.6
Maturities, calls, paydowns, and other repayments		1,873	2,409.3	2,560.5
Cash received for sales/settlements of derivatives and other investments		85.9	233.2	245.2
Repayments of mortgage loans		377.4	578.6	420.7
Cash received (pledged or returned) as collateral, net		166	(168.4)	54.9
Other, net		(11)	(25.3)	(43.1)
Net cash provided by (used in) investing activities		(2,424.9)	(2,222.7)	(2,144.7)
Policyholder account balances:
Deposits		3,715.4	4,374.5	3,689.8
Withdrawals		(2,173.8)	(2,778.3)	(2,620.9)
Cash dividends paid on common stock		(80)	(50)	(29.1)
Other, net		0	0	0
Net cash provided by (used in) financing activities		1,461.6	1,546.2	1,039.8
Net increase (decrease) in cash, cash equivalents, and restricted cash		73.1	(69.9)	20.4
Cash, cash equivalents, and restricted cash at beginning of period		254.8	348.3	327.9
Cash, cash equivalents, and restricted cash at end of period	$ 254.8	327.9	278.4	348.3
Supplemental disclosures of cash flow information
Income taxes		(4.5)	(19.3)	28.2
Non-cash transactions during the period:
Fixed maturities exchanges		309.1	1,397	649.2
Cash, cash equivalents, and restricted cash reconciliation
Total cash, cash equivalents, and restricted cash	254.8	327.9	$ 348.3	$ 327.9
Predecessor Company
Cash flows from operating activities
Net income (loss)	(3.9)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Net realized (gains) losses	26.9
Accretion and amortization of invested assets, net	8.3
Amortization of intangible assets	0.2
Deferred income tax provision (benefit)	15.3
Interest credited on deposit contracts	84.9
Mortality and expense charges and administrative fees	(13.6)
Payment at inception of reinsurance transaction	0
Other changes in:
DAC and VOBA	(11)
Future policy benefits	(2.7)
Other policyholder reserves	3.6
Policy and contract claims	(6.1)
Funds withheld liability	0
Other assets and liabilities	(46.4)
Other, net	(8.4)
Total adjustments	51
Net cash provided by (used in) operating activities	47.1
Purchases of:
Fixed maturities – available-for-sale	(437.6)
Fixed maturities – trading	0
Marketable equity securities	(11.1)
Derivatives and other investments	(5.6)
Issuances of mortgage loans	(45.4)
Sales of fixed maturities – available-for-sale	193
Sales of fixed maturities – trading	0
Sales of marketable equity securities	9.6
Maturities, calls, paydowns, and other repayments	129.8
Cash received for sales/settlements of derivatives and other investments	20.3
Repayments of mortgage loans	33.9
Cash received (pledged or returned) as collateral, net	(19.7)
Other, net	0.6
Net cash provided by (used in) investing activities	(132.2)
Policyholder account balances:
Deposits	365.4
Withdrawals	(169.1)
Cash dividends paid on common stock	0
Other, net	(1.2)
Net cash provided by (used in) financing activities	195.1
Net increase (decrease) in cash, cash equivalents, and restricted cash	110
Cash, cash equivalents, and restricted cash at beginning of period	144.8	254.8
Cash, cash equivalents, and restricted cash at end of period	254.8
Supplemental disclosures of cash flow information
Income taxes	0
Non-cash transactions during the period:
Fixed maturities exchanges	11.1
Cash, cash equivalents, and restricted cash reconciliation
Total cash, cash equivalents, and restricted cash	$ 144.8	$ 254.8

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	1. Description of Business The accompanying financial statements include, on a consolidated basis, the accounts of Symetra Life Insurance Company (Symetra Life) and its three wholly-owned subsidiaries, Symetra National Life Insurance Company, First Symetra National Life Insurance Company of New York, and Symetra Reinsurance Corporation, collectively referred to as "Symetra" or "the Company." Symetra Life is a stock life insurance company and a wholly-owned subsidiary of Symetra Financial Corporation, a Delaware corporation, referred to as "the Parent." Symetra offers products and services that serve the retirement, employment-based benefits and life insurance markets. These products and services are marketed through financial institutions, broker-dealers, benefits consultants, and independent agents and advisors in all 50 states and the District of Columbia. The Company's principal products include fixed and fixed indexed deferred annuities, single premium immediate annuities (SPIA), medical stop-loss insurance, group life and disability income (DI) insurance, group fixed-payment insurance, universal life insurance, including indexed universal life insurance, and institutional life insurance including bank-owned life insurance (BOLI) and variable corporate owned life insurance (COLI). On February 1, 2016 (the Merger Date), the Parent became a wholly-owned subsidiary of Sumitomo Life Insurance Company, an event which is referred to as the Merger. The Merger was accounted for under the acquisition method of accounting (purchase accounting, or PGAAP). These financial statements include information as of December 31, 2018 and 2017, for the years ended December 31, 2018 and 2017, and for the period February 1 to December 31, 2016 that relates to the Successor Company, following completion of the Merger. Information for the period January 1 to January 31, 2016 relates to the Predecessor Company. Amounts are generally not comparable between the Successor Company and Predecessor Company due to the application of purchase accounting. Reinsurance Transaction In September 2018, the Company entered into a 100% modified coinsurance reinsurance agreement with Resolution Re Ltd. (the Reinsurance Transaction) for $6.8 billion of its in force income annuities, including all of its structured settlement annuities (the Closed Block). The transaction reduced the Company's exposure to long-term interest rate risk associated with the long-tail nature of the reinsured business. The Company discontinued selling structured settlements in 2012. Retail SPIA policies issued after September 30, 2017 were not included in this agreement, and the Company continues to sell these products as part of its retirement product offerings. Under terms of the agreement, the Company continues to service the reinsured business and hold the associated invested assets and policyholder liabilities on its balance sheets. Resolution Re Ltd. is responsible for asset management, subject to investment management guidelines. Refer to Note 13 for further discussion.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation and Use of Estimates The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). All significant intercompany transactions and balances between Symetra Life and its subsidiaries have been eliminated. Certain reclassifications have been made to prior year financial information to conform to the current period presentation. The Company adjusted its segment information to reflect its new reportable segments following the execution of the Reinsurance Transaction in the third quarter of 2018. Refer to Note 13 for further discussion. The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that may affect the amounts reported in the consolidated financial statements and accompanying notes. The most significant estimates include those used to determine the following: valuation of investments carried at fair value; the balance, recoverability and amortization of deferred policy acquisition costs (DAC) and value of business acquired (VOBA); the liabilities for funds held under deposit contracts, future policy benefits, and policy and contract claims; recoverability of goodwill and intangible assets; valuation of the deposit asset, funds withheld liability and embedded derivative related to the Reinsurance Transaction; and valuation of deferred tax assets. The recorded amounts reflect management’s best estimates, though actual results could differ from those estimates. Recognition of Insurance Revenue and Related Benefits The Company’s group insurance policies, which include medical stop-loss, and group life and DI, are short-duration contracts. Group life and DI business includes group life insurance and short- and long-term disability products. Premiums from these products are recognized as revenue when earned over the life of the policy. Policyholder claims are charged to operations as incurred. Traditional individual life insurance products, including term life insurance products, are long-duration contracts, and the associated premiums and benefits are fixed. Premiums from these products are considered earned and recognized as revenue when due. Reserves are associated with earned premiums such that profits are recognized over the life of the contracts. Deposits related to universal life (UL) insurance products and investment-type products are credited to policyholder account balances and reflected as liabilities, rather than as premium income, when received. Investment-type products include fixed deferred annuities, SPIA, and structured settlements. Revenues from UL insurance and investment-type products consist of net investment income on the policyholders’ fund balances, and amounts assessed for cost of insurance, policy administration, and surrender charges. These assessments are recorded in policy fees, contract charges, and other in the consolidated statements of income (loss). Expenses charged to operations for these products include interest credited and claims in excess of related policyholder account balances. These amounts are expensed as incurred. Revenue from variable annuities, life and COLI products include mortality and expense, policy administration and surrender charges. These fees are charged to policyholders’ accounts based upon the daily net assets of the policyholders’ account values and are recognized as revenue in policy fees, contract charges, and other in the consolidated statements of income (loss) when assessed. Separate Account Assets and Liabilities Separate account balances relate to the Company's variable products. Separate account assets are reported at fair value and represent funds that are invested on behalf of the Company’s variable product policyholders. The assets of each separate account are legally segregated and are not subject to claims that arise out of the Company’s other business activities. Investment risks associated with market value changes are borne by the policyholder, except to the extent of death benefits guaranteed by the Company with respect to certain accounts. Net investment income and realized gains and losses accrue directly to the policyholders and are not included in the Company’s revenues. Separate account liabilities represent the policyholders' account balances in the separate account. For variable annuity contracts with guaranteed minimum death benefits (GMDB), the Company contractually guarantees death benefits that may exceed the policyholder's account balance. The Company reinsures most of the GMDB risk on its variable annuity contracts. Funds Held Under Deposit Contracts Funds held under deposit contracts includes liabilities for fixed deferred annuity contracts, fixed indexed annuities (FIA), SPIA, structured settlement annuities, and UL policies, including BOLI. For the Successor Company, these liabilities also include PGAAP-related adjustments discussed below. Liabilities for fixed deferred annuity contracts, and the fixed account portion of FIA and universal life policies are equal to account value, plus additional liabilities for policy benefits accrued but not yet earned, credited, or redeemed. Account value represents the amount available in cash to the policyholder, without regard to any surrender fees. This is computed as deposits net of withdrawals made by the policyholder, plus amounts credited based on contract specifications, less contract fees and charges assessed, plus any additional interest. Policy benefits accrued but not yet earned, credited, or redeemed relate to bonus interest, excess death benefits, and other policy benefits that can be attributed to a specific policy or group of policies. The liability for the indexed account portions of FIA and Indexed UL represent the present value of future estimated guaranteed benefits, as well as embedded derivatives related to expected index credits on these contracts and policies. The embedded derivatives are recorded at fair value. See Note 6 for further discussion. For SPIA and structured settlements, liabilities are based on discounted amounts of estimated future benefits. Future benefits are either fully guaranteed or are contingent on the survivorship of the contract holder. For policies issued subsequent to the Merger, contingent future benefits are discounted with pricing mortality assumptions, which include provisions for longer life spans over time. The interest rate pattern used to calculate the reserves for these policies is set at issue, and interest rates for the pattern vary over time. For the Successor Company, assumptions were reset for policies in force as of the date of the Merger, as discussed below. Impact of Purchase Accounting In conjunction with the Merger, liabilities for in-force business were recorded at fair value and the underlying contracts were considered to be new contracts for measurement and reporting purposes as of the Merger Date. Estimating the fair value of these liabilities required the use of current assumptions for future investment yields, mortality, persistency, and other factors based on the Company’s historical experience, modified as necessary to reflect anticipated trends. The Company’s assumptions and estimates required significant judgment and, therefore, are inherently uncertain. The Company cannot determine with precision the ultimate amounts that it will pay to its contract holders or the timing of those payments. At the Merger Date, the Company updated the assumptions described above to reflect current best estimates. Either a VOBA asset or an additional insurance liability was recorded to reflect the difference between the fair value of the liability and the amounts previously established. An additional insurance liability was established for the Company's lines of business related to structured settlements, SPIA, and certain BOLI policies. The liability is reported in funds held under deposit contracts and amortized over the policy period in proportion to the approximate consumption of losses. Amortization is recorded as a reduction of interest credited. Funding Agreements with Federal Home Loan Bank of Des Moines In August 2018, the Company became a member of the Federal Home Loan Bank of Des Moines (FHLB DM). Membership allows access to the FHLB DM's funding services, which provide an alternative liquidity source, including the ability to obtain loans and issue funding agreements that are collateralized by qualifying assets. Eligible collateral includes eligible CMBS, RMBS, government or agency securities and mortgage loans. The Company has issued funding agreements to the FHLB DM to support an institutional spread program, where the Company earns income primarily from the difference between investment income earned and interest paid on the funding agreements. These amounts are recorded in net investment income and interest credited, respectively, on the consolidated statements of income (loss). As of December 31, 2018, the Company had outstanding funding agreements of $105.7 and had pledged collateral with a fair value of $221.2 . The Company's maximum borrowing capacity with the FHLB DM is based on a percentage of total assets. As of December 31, 2018, the Company's maximum borrowing capacity from the FHLB DM was $11.4 billion , subject to availability of eligible collateral and internal authorization limits. Future Policy Benefits The Company estimates liabilities for future policy benefits for its traditional individual life policies as the present value of expected future policy benefits less future net premiums. The Company selects the net premiums so that the actuarial present value of future benefits equals the actuarial present value of future premiums. The Company sets the interest, mortality, and persistency assumptions in the year of issue and includes a provision for adverse deviation. The provision for adverse deviation is intended to provide coverage for the risk that actual experience may be worse than locked-in best-estimate assumptions. The Company derives mortality assumptions from both company-specific and industry statistics. Future benefits are discounted at interest rates that vary by year of policy issue. These rates are initially set to be consistent with investment rates at the time of issue, and are graded to a lower rate over time. Assumptions are set at the time each product is introduced and are not updated for actual experience unless the total product liability amount is determined to be inadequate to cover future policy benefits. The Company estimates liabilities for future policy benefits for group long-term disability policies as the present value of future benefit payments, net of terminations and reinsurance recoverables, and discounted at interest rates based on investment rates at the time of disability. Liabilities for policies in-force as of the Merger Date were set to fair value, using assumptions that reflected current best estimates as of the Merger Date. Investments in Limited Partnerships The Company invests in limited partnerships where the primary return on investment is in the form of income tax credits and the tax benefit on the pass-through of partnership activity. These partnerships (collectively referred to as "tax credit investments") are established to invest in low-income housing and other qualifying purposes. Refer to Note 4 for further discussion. Investments in limited partnerships also include alternative investments (private equity and hedge funds) recorded at fair value. Changes in the fair value of these investments are recorded in realized gains (losses). The Company elected the fair value option for these investments, regardless of ownership percentage, to standardize the related accounting and reporting. Policy Loans Policy loans are carried at unpaid principal balances. Policy loans are not granted for amounts in excess of the accumulated cash surrender value of the policy or contract. Variable Interest Entities The Company performs an ongoing qualitative assessment of its involvement with variable interest entities (VIEs). A VIE is an entity that does not have sufficient equity to finance its own activities without additional financial support, or where investors lack certain characteristics of a controlling financial interest. The Company assesses its contractual, ownership or other interests in a VIE to determine whether it has a variable interest in the entity, and if so, to determine whether the Company has a controlling financial interest and would therefore be considered the primary beneficiary of the VIE. If it is determined the Company is the primary beneficiary of a VIE, the Company includes the assets and liabilities of the VIE in the consolidated financial statements. The limited partnerships that the Company invests in meet the definition of a VIE. Because the Company, as a limited partner, lacks the ability to direct the activities of any of these partnerships, it is not considered the primary beneficiary and therefore has not consolidated them. The maximum exposure to loss in these VIEs was $131.2 and $176.3 as of December 31, 2018 and 2017, respectively. The maximum exposure to loss includes commitments to provide future capital contributions. In the normal course of business, the Company also makes passive investments in structured securities issued by VIEs. These structured securities primarily include residential and commercial mortgage-backed securities and collateralized loan obligations. Because the Company lacks the ability to direct the activities that most significantly impact the economic performance of the VIEs, it is not considered the primary beneficiary and therefore does not consolidate them. The Company’s maximum exposure to loss with respect to these investments is limited to the amortized cost of the Company’s investment, which was $5,424.0 and $5,053.9 as of December 31, 2018 and 2017, respectively. Subsequent Events The Company has evaluated the effects of events subsequent to December 31, 2018, and the accounting and disclosure requirements related to subsequent events are included in the consolidated financial statements. Management has assessed material subsequent events through March 27, 2019, the date the financial statements were available to be issued. Other Significant Accounting Policies The following table includes significant accounting policies that are described in other notes to the financial statements, including the number of the note. Significant Accounting Policy Note # Other Intangible Assets 3 Goodwill 3 Investments 4 Mortgage Loans 5 Derivative Financial Instruments 6 Fair Value of Financial Instruments 7 Deferred Policy Acquisition Costs (DAC) 8 Value of Business Acquired (VOBA) 8 Liability for Unpaid Claims 9 Commitments and Contingencies 11 Segment Information 12 Reinsurance 13 Income Taxes 14 Accounting Pronouncements Newly Adopted ASU No. 2016-01, Financial Instruments (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities. This accounting standards update (ASU) amends recognition and disclosure requirements primarily for equity investments carried at fair value. Under the standard, changes in fair value are recorded in income. The update is effective beginning January 1, 2018, with early adoption permissible. The Company adopted the standard on January 1, 2018 using a modified retrospective approach. The Company previously held equity investments classified as available-for-sale securities that were impacted by the standard. Upon adoption, $114.3 of net unrealized gains, net of taxes of $30.4 , related to these securities were reclassified from accumulated other comprehensive income (loss) (AOCI) to retained earnings. Subsequent to adoption, changes in fair value of these securities are recorded through net realized gains (losses) in the consolidated statements of income (loss). As a result, the Company expects increased volatility in net income and removed disclosures no longer required. ASU No. 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This standard amends the guidance for amortization of premiums on purchased callable debt securities. Under the standard, premiums on these securities will be amortized to the earliest call date, rather than final maturity of the security. The guidance applies only to bonds for which the call date and price is fixed. Further, the amortization period for debt securities carried at a discount will not be impacted. The update is effective beginning January 1, 2019, with early adoption permissible. The Company early adopted the standard on October 1, 2018 using a modified retrospective approach. The change in amortization method upon adoption did not have a significant impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Adopted ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This standard amends the recognition and measurement of hedging instruments to better represent an entity's risk management activities. Under the standard, the requirement to separately measure and report hedge ineffectiveness is eliminated. In addition, the standard provides relief from certain initial documentation requirements and replaces the requirement for quarterly quantitative ineffectiveness testing with a qualitative approach. The update is effective beginning January 1, 2019, with early adoption permissible. The Company adopted the standard on January 1, 2019 using a modified retrospective approach. Upon adoption, the Company updated its internal processes and controls to ensure compliance with the revised standard. The adoption did not have a significant impact on the Company's consolidated financial statements. ASU No. 2016-02, No. 2018-10, No. 2018-11, Leases (Topic 842). These standards amend the recognition requirements for all leases with a term greater than 12 months and provide new guidelines for the identification of a lease within a contract. Under these standards, companies must measure and recognize a liability to make lease payments and a right-of-use asset representing the right to use the underlying asset for the lease term. In addition, the standards require expanded quantitative and qualitative disclosures. The standards also provide a simplified transition method, which allows entities to recognize the cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, rather than in the earliest period presented. These updates are effective beginning January 1, 2019, with early adoption permissible. The Company adopted the standard on January 1, 2019 using a modified retrospective approach and applied the requirements to all existing leases using the simplified transition option. Upon adoption, the Company established a right-of-use asset of $6.6 and corresponding lease liability on its consolidated balance sheets and did not have any income statement impact. ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). This standard amends the credit loss measurement guidance for certain financial assets to reflect current expected credit losses (CECL). Under the CECL model, an entity will estimate lifetime expected credit losses considering available relevant information about historical events, current conditions and reasonable and supportable forecasts. Additionally, the guidance expands the required credit loss disclosures. Finally, the standard amends the impairment model for available-for-sale fixed maturities, and any credit losses will be recognized through an allowance, rather than through an adjustment to the amortized cost basis. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is evaluating the impact of the standard on its financial statements, with a focus on fixed maturity securities, mortgage loans, and reinsurance recoverables. Upon adoption, the Company will apply the standard using a modified retrospective approach. The Company plans to adopt on January 1, 2020. ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350) . This standard removes the requirement to calculate the implied fair value of goodwill (Step 2 of the goodwill impairment test) to measure a goodwill impairment charge. A goodwill impairment charge will now be measured as the amount by which a reporting unit's carrying value exceeds its fair value determined in Step 1 of the goodwill impairment test. This impairment test will be applied to goodwill assigned to all reporting units, even those with zero or negative carrying amounts. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is monitoring the potential impact of the standard on its annual goodwill impairment assessment. Upon adoption, the Company will apply the standard prospectively. The Company plans to adopt on January 1, 2020. ASU No. 2018-12, Financial Services – Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts . This standard substantially changes the accounting treatment of long-duration contracts. Entities will now be required to regularly review and update assumptions used to measure the liability for future policy benefits, which were previously locked at contract inception and held constant over the contract term. Assumptions used to measure discounted cash flows will be reviewed at least annually, and the discount rate assumption will be updated at each reporting date based on a standardized, market-observable discount rate. Entities will also be required to use a fair value model to measure their market risk benefits, with the insurance accrual model no longer an option. The standard also simplifies the DAC amortization method for all long-duration contracts by replacing the previous earnings-based methods with a constant level approach. The update will also require additional financial statement disclosures, including a rollforward of the liability and information about significant assumptions used. The update is effective beginning January 1, 2021, with early adoption permissible. The Company is in the early stages of assessing the impact of the standard on its annuity and life insurance contracts, and assessing which transition approach to apply upon adoption. The Company plans to adopt on January 1, 2021. ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework. This standard amends the disclosure requirements for fair value measurements. Under the standard, there are new disclosure requirements for Level 3 fair value measurements as well as the elimination of certain current disclosure requirements. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is assessing the impact on its annual disclosures. The Company plans to adopt on January 1, 2020.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	3. Goodwill and Other Intangible Assets Intangible assets with finite lives are amortized on a straight-line basis over the estimated useful life of the assets. Amortizable intangible assets consist of value of distribution acquired (VODA), value of customer relationships acquired (VOCRA), trade names and technology. VODA represents the present value of expected future profits associated with the expected future business derived from distribution relationships in existence as of the Merger Date. VOCRA represents the present value of the expected future profits associated with the Company's group insurance business in-force in the Benefits segment as of the Merger Date, including the value of renewals associated with this business. Identified intangible assets were valued using the excess earnings method, relief from royalty method or cost approach, as appropriate. Other intangible assets with finite lives are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets might not be recoverable. Conditions that would necessitate an impairment assessment include a significant change in the extent or manner in which an asset is used or any other significant adverse change that would indicate that the carrying amount of an asset or group of assets may not be recoverable. Impairment is only recorded if the asset’s carrying amount is not recoverable through its undiscounted future cash flows. If an impairment exists, the amount is measured as the difference between the carrying amount and fair value. The following table sets forth the gross carrying amounts and accumulated amortization for identified intangible assets as of December 31, 2018 and 2017: As of December 31, 2018 As of December 31, 2017 Useful Life on Acquisition Date Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization VODA 35 years $ 782.0 $ (66.2 ) $ 782.0 $ (43.5 ) VOCRA 10 years 361.8 (105.5 ) 361.8 (69.4 ) Trade names 17 years 190.0 (32.6 ) 190.0 (21.4 ) Technology 5 years 72.0 (42.0 ) 72.0 (27.6 ) Total intangible assets subject to amortization 24.3 years 1,405.8 (246.3 ) 1,405.8 (161.9 ) Insurance licenses Indefinite 11.0 — 11.0 — Total intangible assets $ 1,416.8 $ (246.3 ) $ 1,416.8 $ (161.9 ) The following table sets forth the estimated future aggregate amortization expense for the next 5 years: Year Amount 2019 $ 84.5 2020 84.5 2021 70.9 2022 69.6 2023 69.6 Goodwill Goodwill represents the acquisition price in excess of the fair value of net assets acquired in the Merger, including identifiable intangible assets, and reflects the Company’s future growth potential, assembled workforce and other sources of value not associated with identifiable assets. The Company's goodwill balance was assigned to its reporting units, which are the same as the Company's segments (Benefits, Retirement and Individual Life). Refer to Note 12 for additional information regarding our segments. The goodwill recognized is not deductible for tax purposes. The following table presents the Company's goodwill by segment: As of As of Segment goodwill: Benefits $ 308.0 $ 308.0 Retirement 249.0 249.0 Individual Life 6.0 6.0 Total goodwill $ 563.0 $ 563.0 The Company has elected not to amortize goodwill, and reviews for impairment at least annually, as of July 1, or more frequently if there are indicators of impairment, with consideration given to financial performance and estimates of the future profitability of the associated lines of business. The goodwill impairment process requires a comparison of the estimated fair value of a reporting unit to its carrying value. The Company tests goodwill for impairment by either performing a qualitative assessment or a quantitative test. The qualitative assessment is an assessment of historical information and relevant events and circumstances to determine whether it is more likely than not that an impairment exists. If the Company concludes that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill, the Company moves on to a quantitative impairment test. The Company may also elect not to perform the qualitative assessment for some or all of its reporting units and perform a quantitative impairment test instead. In performing the quantitative impairment test, the Company may determine the fair values of its reporting units by applying a discounted cash flow and/or market valuation approach. The discounted cash flow valuation approach requires significant judgments and assumptions about the level of economic capital required to support the mix of business, long-term growth rates, the account value of in-force business, projections of new and renewal business, as well as margins on such business, the level of interest rates, credit spreads, equity market levels, and the discount rate that the Company believes is appropriate for the respective reporting unit. If the fair value is lower than the carrying amount, the Company determines the implied fair value of goodwill and records an impairment equal to the excess of the existing goodwill balance over the implied fair value. During 2018, the Company performed its annual impairment assessment of goodwill and determined that goodwill was not impaired.

Investments

Investments	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Investments	4. Investments The Company's investment portfolio consists of fixed maturities and commercial mortgage loans, as well as a smaller allocation of investments in limited partnerships, derivatives, marketable equity securities, and other investments. Historically, equity investments included exchange traded funds and common stock in support of structured settlement annuities. The majority of the Company's equity investments were sold in connection with the Reinsurance Transaction. As of December 31, 2018, and 2017, the Company had no investments in related parties. Closed Block Invested Assets As of December 31, 2018 , invested assets supporting the Closed Block had a carrying value of $5.9 billion. This included commercial mortgage loans with a carrying value of $1.2 billion, fixed maturity securities with a fair value of $4.8 billion, and a book value of $4.7 billion, and restricted cash of $50.5 , included in receivables and other assets in the consolidated balance sheets. Invested assets supporting the Closed Block are legally owned by the Company and included in the consolidated balance sheets. Subsequent to July 1, 2018, the effective date of the Reinsurance Transaction, the Company designated new purchases of fixed maturities supporting the Closed Block as trading securities, which are carried at fair value on the Company's consolidated balance sheets. Trading securities had a fair value of $1.1 billion as of December 31, 2018 . The trading securities primarily consist of corporate securities, with a total fair value of $918.9 . Changes in the fair value of trading securities are recorded as realized gains (losses), and interest income earned on trading securities is reported in net investment income on the Company's consolidated statements of income (loss). Available-for-Sale Securities The Company classifies the majority of its investments in fixed maturities as available-for-sale and carries them at fair value. Fixed maturities primarily include bonds, mortgage-backed securities, collateralized loan obligations and redeemable preferred stock. See Note 7 for information on the valuation of these securities and additional disclosures regarding fair value measurements. The Company reports net unrealized gains (losses) related to its available-for-sale securities in AOCI in stockholder’s equity, net of related DAC and VOBA adjustments and deferred income taxes. The cost of securities sold is determined using the specific-identification method. The Company reports interest and dividends earned, including prepayment fees or interest-related make whole payments, in net investment income. Prepayments of fixed maturities and commercial mortgage loans result in accelerated amortization or accretion of the premium or discount associated with the investment, which is recorded in realized gains (losses). Interest income for fixed maturities is recognized using the effective yield method. For mortgage-backed securities, the Company recognizes income using a constant effective yield based on anticipated prepayments and the estimated economic life of the securities. Quarterly, the Company compares actual prepayments to anticipated prepayments and recalculates the effective yield to reflect actual payments plus anticipated future payments. The Company includes any resulting adjustment in net investment income in the current period. When the collectibility of interest income for fixed maturities is considered doubtful, any accrued but uncollectible interest is deducted from investment income in the current period. The Company then places the securities on nonaccrual status, and they are not restored to accrual status until all delinquent interest and principal are paid. The following tables summarize the Company's available-for-sale (AFS) securities: As of December 31, 2018 Cost or Gross Gross Fair Value U.S. government and agencies $ 435.9 $ 3.0 $ (6.1 ) $ 432.8 State and political subdivisions 737.0 2.4 (10.5 ) 728.9 Corporate securities 24,074.0 204.5 (587.1 ) 23,691.4 Residential mortgage-backed securities 2,435.6 6.5 (60.9 ) 2,381.2 Commercial mortgage-backed securities 867.2 4.0 (12.8 ) 858.4 Collateralized loan obligations 933.6 0.2 (21.2 ) 912.6 Other debt obligations 1,171.4 14.3 (11.7 ) 1,174.0 Total $ 30,654.7 $ 234.9 $ (710.3 ) $ 30,179.3 As of December 31, 2017 Cost or Gross Gross Fair Value Fixed maturities: U.S. government and agencies $ 426.9 $ 0.2 $ (4.9 ) $ 422.2 State and political subdivisions 794.3 5.0 (6.9 ) 792.4 Corporate securities 23,223.8 768.9 (60.5 ) 23,932.2 Residential mortgage-backed securities 2,516.0 6.6 (49.8 ) 2,472.8 Commercial mortgage-backed securities 795.0 3.8 (3.1 ) 795.7 Collateralized loan obligations 1,128.1 18.5 — 1,146.6 Other debt obligations 715.1 9.8 (5.5 ) 719.4 Total fixed maturities 29,599.2 812.8 (130.7 ) 30,281.3 Marketable equity securities 611.4 150.7 (6.4 ) 755.7 Total $ 30,210.6 $ 963.5 $ (137.1 ) $ 31,037.0 The Company maintains a diversified portfolio of corporate fixed maturity securities across industries. The following table presents the composition of the Company's corporate securities portfolio by sector: As of December 31, 2018 As of December 31, 2017 Fair Value % of Total Fair Value % of Total Consumer staples $ 5,707.7 24.1 $ 5,779.5 24.1 Industrial 4,281.2 18.1 4,737.1 19.8 Energy 2,892.4 12.2 2,457.7 10.3 Financials 2,660.8 11.2 2,535.0 10.6 Utilities 2,652.0 11.2 2,739.2 11.4 Telecommunication services 2,230.0 9.4 2,248.6 9.4 Consumer discretionary 2,110.9 8.9 2,010.8 8.4 Other 1,156.4 4.9 1,424.3 6.0 Total $ 23,691.4 100.0 % $ 23,932.2 100.0 % The following tables summarize gross unrealized losses and fair values of the Company's available-for-sale investments. The tables are aggregated by investment category and present separately those securities that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. As of December 31, 2018 Less Than 12 Months 12 Months or More Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities U.S. government and agencies $ 11.2 $ (0.3 ) 3 $ 199.9 $ (5.8 ) 31 State and political subdivisions 55.3 (0.7 ) 10 512.2 (9.8 ) 80 Corporate securities 10,978.2 (318.5 ) 971 6,704.3 (268.6 ) 440 Residential mortgage-backed securities 258.0 (3.4 ) 67 1,864.1 (57.5 ) 469 Commercial mortgage-backed securities 110.1 (3.6 ) 16 461.2 (9.2 ) 45 Collateralized loan obligations 811.2 (19.8 ) 45 41.1 (1.4 ) 3 Other debt obligations 188.9 (2.8 ) 15 324.6 (8.9 ) 39 Total $ 12,412.9 $ (349.1 ) 1,127 $ 10,107.4 $ (361.2 ) 1,107 As of December 31, 2017 Less Than 12 Months 12 Months or More Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities Fixed maturities: U.S. government and agencies $ 111.2 $ (0.3 ) 4 $ 206.2 $ (4.6 ) 30 State and political subdivisions 311.8 (2.8 ) 48 169.7 (4.1 ) 36 Corporate securities 4,963.8 (34.3 ) 396 1,257.7 (26.2 ) 82 Residential mortgage-backed securities 693.4 (7.7 ) 176 1,509.9 (42.1 ) 351 Commercial mortgage-backed securities 296.5 (1.4 ) 24 60.5 (1.7 ) 19 Collateralized loan obligations 10.0 — 1 — — — Other debt obligations 218.0 (2.5 ) 32 109.3 (3.0 ) 13 Total fixed maturities 6,604.7 (49.0 ) 681 3,313.3 (81.7 ) 531 Marketable equity securities 34.8 (3.3 ) 153 40.7 (3.1 ) 9 Total $ 6,639.5 $ (52.3 ) 834 $ 3,354.0 $ (84.8 ) 540 Based on National Association of Insurance Commissioners (NAIC) ratings as of December 31, 2018 and 2017 , the Company held below-investment-grade fixed maturities with fair values of $868.0 and $1,111.4 , respectively, and amortized costs of $888.0 and $1,029.6 , respectively. These holdings amounted to 2.9% and 3.7% of the Company's available-for-sale fixed maturities as of December 31, 2018 and 2017 , respectively. The following table summarizes the amortized costs and fair values of available-for-sale fixed maturities as of December 31, 2018 , by contractual years to maturity. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Amortized Cost Fair Value One year or less $ 1,372.5 $ 1,365.6 Over one year through five years 8,659.2 8,563.0 Over five years through ten years 10,408.1 10,199.1 Over ten years 4,893.0 4,811.9 Total fixed maturities with contractual maturity dates 25,332.8 24,939.6 Residential mortgage-backed securities 2,435.6 2,381.2 Commercial mortgage-backed securities 867.2 858.4 Collateralized loan obligations 933.6 912.6 Other asset-backed securities 1,085.5 1,087.5 Total fixed maturities $ 30,654.7 $ 30,179.3 The following table summarizes the Company's net investment income: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Fixed maturities – AFS $ 1,104.3 $ 1,055.8 $ 915.3 $ 95.5 Fixed maturities – Trading 11.2 — — — Marketable equity securities 12.9 17.9 19.4 0.3 Mortgage loans 277.8 239.9 195.1 21.3 Other 15.8 9.9 7.1 (4.1 ) Total investment income 1,422.0 1,323.5 1,136.9 113.0 Investment expenses (45.5 ) (39.4 ) (35.6 ) (3.3 ) Ceded net investment income (1) (170.7 ) — — — Net investment income $ 1,205.8 $ 1,284.1 $ 1,101.3 $ 109.7 ____________________ (1) Ceded net investment income represents statutory-basis investment income in the Closed Block. The following table summarizes the Company's net realized gains (losses): Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Fixed maturities – AFS: Gross gains on sales $ 39.9 $ 23.1 $ 20.7 $ 2.4 Gross losses on sales (49.9 ) (10.4 ) (24.3 ) (1.2 ) Net impairment losses (7.8 ) (6.4 ) (10.7 ) (3.8 ) Marketable equity securities (1) 10.1 30.9 23.3 (22.5 ) Total return swaps (47.7 ) (4.3 ) (22.8 ) — Fixed maturities – Trading (2) (41.0 ) — — — Investments in limited partnerships (42.7 ) (54.9 ) (47.1 ) (0.6 ) Net gains (losses) – FIA (3) (6.9 ) 23.9 (14.3 ) (4.4 ) Annual unlocking impact (39.2 ) 20.1 9.8 — DAC and VOBA adjustment (3.0 ) (8.0 ) 9.3 (0.4 ) Embedded derivative – Closed Block 67.0 — — — Ceded realized (gains) losses (4) (132.7 ) — — — Other (5) 3.7 (12.1 ) (54.2 ) 3.6 Net realized gains (losses) $ (250.2 ) $ 1.9 $ (110.3 ) $ (26.9 ) ____________________ (1) Includes net losses on changes in the fair value of equity securities held totaling $(17.5) for the year ended December 31, 2018. The majority of the Company's equity investments were sold during 2018 in connection with the Reinsurance Transaction. (2) Includes net losses on changes in the fair value of fixed maturities – trading securities held totaling $(21.4) for year ended December 31, 2018. (3) Includes changes in fair value of the FIA embedded derivative (VED) and related options, excluding options related to the Company's block of FIA business sold during the late 1990s. (4) Includes ceded realized statutory (gains) losses on sales of assets supporting the Closed Block. (5) Includes net gains (losses) related to calls and redemptions, certain derivatives not designated for hedge accounting, commercial mortgage loans, and other instruments. For more information on net gain (losses) on derivatives not designated as hedges, refer to Note 6. Other-Than-Temporary Impairments (OTTI) The Company's review of available-for-sale fixed maturities for OTTI includes both quantitative and qualitative criteria. Quantitative criteria include the length of time and amount that each security is in an unrealized loss position (i.e., is underwater) and whether expected future cash flows indicate that a credit loss exists. While all securities are monitored for impairment, the Company's experience indicates that, under normal market conditions, securities for which the cost or amortized cost exceeds fair value by less than 20% do not typically represent a significant risk of impairment and, often, fair values recover over time as the factors that caused the declines improve. If the estimated fair value has declined and remained below cost or amortized cost by 20% or more for at least six months, the Company further analyzes the decrease in fair value to determine whether it is an other-than-temporary decline. To make this determination for each security, the Company considers, among other factors: • Extent and duration of the decline in fair value below amortized cost; • Financial condition and near-term prospects of the issuer of the security, including any specific events that may affect its operations, earnings potential or compliance with terms and covenants of the security; • Changes in the financial condition of the security's underlying collateral; • Any downgrades of the security by a rating agency; • Nonpayment of scheduled interest; and • Other indications that a credit loss has occurred. Fixed Maturities – AFS For fixed maturities, the Company concludes that an OTTI has occurred if a security is underwater and there is an intent to sell the security, or it is more likely than not that the Company will be required to sell the security prior to recovery of its amortized cost, considering any regulatory developments, prepayment or call notifications and the Company's liquidity needs. If there is an intent or requirement to sell the security, the entire unrealized loss is recognized as an OTTI in net realized gains (losses). An OTTI has also occurred if the present value of expected cash flows is less than the amortized cost of the security (i.e., a credit loss exists). In such cases, the Company isolates the portion of the total unrealized loss related to the credit loss, which is recognized in realized gains (losses) on the consolidated statements of income (loss), and the remainder is recorded as a non-credit OTTI through other comprehensive income. To determine the amount of a credit loss, the Company calculates the recovery value by discounting its estimate of future cash flows from the security. The discount rate is the original effective yield for corporate securities, which reflects book value adjustments made at PGAAP, or current effective yield for mortgage-backed and other structured securities. The amount of the credit loss equals the difference between the carrying value and recovery value of the security. Determination of Credit-Related OTTI on Corporate Securities To determine the recovery value for a corporate security, the Company performs an analysis including, but not limited to, the following: • Expected cash flows of the issuer; • Fundamentals of the industry in which the issuer operates; • Fundamentals of the issuer to determine what the Company would recover if the issuer were to file for bankruptcy or restructure its debt outside of bankruptcy; • Expectations regarding defaults and recovery rates; • Changes to the rating of the security by a rating agency; • Third-party guarantees; and • Additional available market information. Determination of Credit-Related OTTI on Structured Securities To determine the recovery value for a structured security, including residential mortgage-, commercial mortgage- and other asset-backed securities, the Company performs an analysis including, but not limited to, the following: • Expected cash flows from the security; • Creditworthiness; • Delinquency, debt-service coverage, and loan-to-value ratios on the underlying collateral; • Underlying collateral values, vintage year and level of subordination; • Geographic concentrations; and • Susceptibility to prepayment due to changes in the interest rate environment. The largest write-downs recorded through net realized gains (losses) on fixed maturities were related to investments in the following sectors: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Amount % of Total Amount % of Total Amount % of Total Amount % of Total U.S. Federal Government (1) $ 2.9 37.2 $ 3.1 48.4 $ 3.7 34.6 $ — — Consumer Discretionary 1.3 16.7 — — — — — — Energy 1.1 14.1 — — 0.4 3.7 3.8 100.0 Financials 0.8 10.2 0.1 1.6 4.2 39.3 — — Telecommunication services 0.7 9.0 2.6 40.6 — — — — Other 1.0 12.8 0.6 — 9.4 2.4 — 22.4 — — — Net impairment losses recognized in earnings $ 7.8 100.0 % $ 6.4 100.0 % $ 10.7 100.0 % $ 3.8 100.0 % ____________________ (1) Impairments on U.S. Federal Government securities are due to the Company's intent to sell and reflect the impact of interest rate movements. The following table presents the severity and duration of the gross unrealized losses on the Company's underwater available-for-sale fixed maturities, after the recognition of OTTI: As of December 31, 2018 As of December 31, 2017 Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities Fixed maturities – AFS: Underwater by 20% or more: Less than 6 consecutive months $ 81.9 $ (23.7 ) 26 $ 5.2 $ (1.7 ) 6 6 consecutive months or more 1.3 (1.8 ) 6 0.9 (0.8 ) 3 Total underwater by 20% or more 83.2 (25.5 ) 32 6.1 (2.5 ) 9 All other underwater fixed maturities 22,437.1 (684.8 ) 2,243 9,911.9 (128.2 ) 1,203 Total underwater fixed maturities $ 22,520.3 $ (710.3 ) 2,275 $ 9,918.0 $ (130.7 ) 1,212 Changes in the amount of credit-related OTTI recognized in net income when the portion related to other factors was recognized in other comprehensive income (loss) (OCI) were as follows: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to January 31, 2016 Balance, beginning of period $ 3.8 $ 4.4 $ — $ 27.7 Increases recognized in the current period: For which an OTTI was not previously recognized 1.5 0.2 4.1 — For which an OTTI was previously recognized — — 0.9 — Decreases attributable to: Securities sold or paid down during the period (0.9 ) (0.8 ) (0.6 ) (0.4 ) Balance, end of period $ 4.4 $ 3.8 $ 4.4 $ 27.3 The Company reviewed its available-for-sale securities with unrealized losses as of December 31, 2018 in accordance with its impairment policy and determined, after the recognition of OTTI, that the declines in fair value were temporary. The Company did not intend to sell its underwater securities, and it was not more likely than not that the Company will be required to sell the securities before recovery of cost or amortized cost, which may be maturity. This conclusion is supported by the Company's spread analyses, cash flow modeling and expected continuation of contractually required principal and interest payments. Investments in Limited Partnerships – Low-Income Housing Project Investments The Company invests in limited partnerships that are established to fund low-income housing and other qualifying purposes, where the primary return on investment is in the form of income tax credits. These are collectively referred to as "tax credit investments." The majority of the Company's tax credit investments relate to low-income housing project investments. As of December 31, 2018 and 2017 , the Company's tax credit investments had carrying values of $130.1 and $173.0 , respectively, of which $122.3 and $165.8 , respectively, related to low-income housing project investments. The Company’s tax credit investments are accounted for under the equity method, which recognizes the Company's share of partnership income or loss (pass through activity) in earnings. Typically, low-income housing project investments are written down over time as partnership losses are allocated to the Company or when the carrying value of the investment exceeds the total amount of remaining benefits. Activity related to these investments is recorded in other net realized gains (losses). The associated tax credits are reported in the provision for income taxes. For certain partnerships, the Company contributes its investment commitment over time, and the present value of any unfunded commitments is included in the asset balance and recorded in other liabilities. The following table sets forth the impact of low-income housing project investments on net income. These amounts do not include the impacts of the Company's holdings in other types of tax credit investments. Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Pass through activity $ (22.6 ) $ (27.4 ) $ (24.0 ) $ (2.1 ) Write downs (22.3 ) (25.6 ) (1.0 ) (0.5 ) Tax benefits 9.4 18.6 8.8 0.9 Tax credits, net 40.0 34.7 35.5 3.1 Impact to net income $ 4.5 $ 0.3 $ 19.3 $ 1.4 The 2017 Tax Act caused a decrease in the Company's expected tax benefits from future pass through activity due to the reduction in the corporate tax rate to 21% from 35% , resulting in impairments of $18.4 during the year ended December 31, 2017.

Mortgage Loans

Mortgage Loans	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Mortgage Loans	5. Mortgage Loans The Company originates and manages a portfolio of mortgage loans, which are secured by first-mortgage liens on income-producing commercial real estate, primarily in the retail, industrial and office building sectors. Loans are underwritten based on loan-to-value (LTV) ratios and debt-service coverage ratios (DSCR), as well as detailed market, property and borrower analyses. The Company's mortgage loan portfolio is considered a single portfolio segment and class of financing receivables, which is consistent with how the Company assesses and monitors the risk and performance of the portfolio. A large majority of these loans have personal guarantees, and all mortgaged properties are inspected annually. The Company updates each loan's LTV ratio every period based on the carrying value of the property, while property information (such as property value and income for DSCR) is updated annually, primarily during the third quarter. The Company's mortgage loan portfolio is diversified by geographic region, loan size and scheduled maturity. As of December 31, 2018 , the three states with the largest concentrations of the Company's commercial mortgage loans were California , Texas and Washington , representing 26.3% , 11.2% , and 6.9% , respectively, of total outstanding principal. Of the loans in California, 41.9% related to properties located in the Los Angeles area. As of the Merger Date, all outstanding mortgage loans were measured at fair value, which resulted in the establishment of a net premium for the portfolio. This net premium is amortized into net investment income for each loan based on its expected maturity, using the effective interest rate method. As of December 31, 2018 and 2017 , the unamortized premium balance was $130.6 and $177.1 , respectively. For loans issued subsequent to the Merger, the carrying value of mortgage loans reflects outstanding principal balances, adjusted for unamortized deferred fees and costs, net of an allowance for loan losses. Loan origination fees and costs are deferred and amortized over the life of the loan. Interest income, including amortization of deferred fees and expenses, is recorded in net investment income using the effective interest rate method. Allowance for Loan Losses The allowance for losses on mortgage loans provides for the risk of credit loss inherent in the lending process. The allowance consists of a portfolio reserve for probable losses incurred but not specifically identified and, as needed, specific reserves for impaired loans. The allowance for losses on mortgage loans is evaluated at each reporting period and adjustments are recorded when appropriate. Loans are specifically evaluated for impairment if the Company considers it probable that amounts due according to the terms of the loan agreement will not be collected, or the loan is modified in a troubled debt restructuring. The Company establishes specific reserves for these loans when the fair value is less than the carrying value. To assist in its evaluation of the allowance for loan losses, the Company utilizes the following credit quality indicators to categorize its loans as lower, medium or higher risk: • Lower Risk Loans – Loans with an LTV ratio of less than 65% , and a DSCR of greater than 1.50 . • Medium Risk Loans – Loans that have an LTV ratio of less than 65% but a DSCR below 1.50 , or loans with an LTV ratio between 65% and 80% and a DSCR of greater than 1.50 . • Higher Risk Loans – Loans with an LTV ratio greater than 80% , or loans which have an LTV ratio between 65% and 80% and a DSCR of less than 1.50 . As a result of the Merger, loans held as of February 1, 2016 (referred to as PGAAP loans) were adjusted to fair value, which incorporated expectations for credit losses at that time, and the allowance was set to zero. The Company separately monitors these loans for deterioration in credit quality or other indicators that a loss has incurred. Any allowance related to these PGAAP loans reflects losses incurred subsequent to the Merger. The following table sets forth the Company's mortgage loans by risk category: As of December 31, 2018 As of December 31, 2017 Balance % Balance % Lower risk $ 1,965.2 66.9 % $ 1,486.1 69.8 % Medium risk 727.6 24.8 486.3 22.8 Higher risk 244.7 8.3 157.6 7.4 Subtotal, excluding certain PGAAP loans 2,937.5 100.0 2,130.0 100.0 Lower risk 2,586.9 73.0 2,899.2 70.7 Medium risk 745.9 21.0 896.8 21.8 Higher risk 211.2 6.0 308.4 7.5 Subtotal, certain PGAAP loans (1) 3,544.0 100.0 % 4,104.4 100.0 % Loans specifically evaluated for impairment (2) — 4.8 Other (3) 3.6 2.0 Total $ 6,485.1 $ 6,241.2 ________________ (1) Represents loans set to fair value on February 1, 2016 for which there are no indications of subsequent credit deterioration. (2) As of both December 31, 2018 and 2017, no reserves were held for loans specifically evaluated for impairment. (3) Includes allowance for loan losses and deferred fees and costs. In developing the portfolio reserve for incurred but not specifically identified losses, the Company evaluates loans by risk category. The Company considers past loan experience, commercial real estate market conditions, third-party data for expected losses on loans with similar LTV ratios and DSCRs, personal guarantees, and other relevant factors when determining whether an allowance is needed for loans categorized as medium or higher risk. No allowance is recorded for lower risk loans, based on their characteristics and the Company's historical experience. In developing the provision for specifically identified loans, a market valuation on the collateral is performed to determine if a reserve is necessary. The following table summarizes the activity in the Company’s allowance for mortgage loan losses, which includes portfolio and specific reserves: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Allowance at beginning of period (1) $ 1.0 $ 0.7 $ — $ 8.1 Provision for specific loans 0.6 — — — Provision for loans not specifically identified 0.5 0.3 0.7 — Charge-offs (0.6 ) — — — Allowance at end of period $ 1.5 $ 1.0 $ 0.7 $ 8.1 ________________ (1) Balance was reset to $0.0 on February 1, 2016 due to PGAAP. Non-performing loans, defined generally as those in default, close to being in default or more than 90 days past due, are placed on non-accrual status. As of December 31, 2018 and 2017 , no loans were considered non-performing.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	6. Derivative Instruments The Company uses derivative financial instruments to hedge certain portions of its exposure to equity market risk, interest rate risk and foreign currency exchange risk. Derivative financial instruments currently held consist primarily of equity market contracts, interest rate swaps, and foreign currency swaps. Derivative instruments may be exchange-traded or contracted in the over-the-counter (OTC) market. The Company has established policies for managing its derivatives, including prohibitions on derivatives market-making and other speculative derivatives activities. All of the Company’s derivative financial instruments are individually recognized at fair value as either assets within derivatives, or liabilities within other liabilities in the consolidated balance sheets. The accounting for derivatives depends on whether it qualifies and has been designated for hedge accounting. To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated risk of the hedged item. Effectiveness of the hedge is formally assessed at inception and throughout the life of the hedging relationship. In connection with purchase accounting, the Company formally redesignated its hedge accounting relationships as of the Merger Date. When a derivative is designated as a cash flow hedge and is determined to be highly effective, changes in its fair value are recorded as a component of other comprehensive income and reclassified into net income in the same period during which the hedged transaction affects net income. Any hedge ineffectiveness is recorded in the consolidated statements of income (loss) within net realized gains (losses). If a derivative instrument does not qualify, or is not designated for hedge accounting, the changes in its fair value are recorded in the consolidated statements of income (loss) within net realized gains (losses). The Company prospectively discontinues hedge accounting when: (1) the criteria to qualify for hedge accounting is no longer met (e.g., the derivative is no longer highly effective in offsetting the change in cash flows of a hedged item); (2) the derivative expires, is sold, terminated or exercised; or (3) the derivative is de-designated as a hedging instrument for hedge accounting purposes. If it is determined that a derivative no longer qualifies as an effective hedge, the derivative continues to be carried in the consolidated balance sheets at its fair value, with changes in fair value recognized prospectively in the consolidated statements of income (loss) within net realized gains (losses). The Company also issues fixed indexed annuity contracts and indexed universal life policies that contain embedded derivatives, which are recorded at fair value in funds held under deposit contracts in the consolidated balance sheets. The Reinsurance Transaction also contains an embedded derivative related to the withheld assets supporting the Closed Block annuity contracts. Refer to Note 13 for more information about the Closed Block embedded derivative. Changes in fair value of embedded derivatives are recognized in net realized gains (losses). Derivative Exposure The following table sets forth the fair value of the Company's derivative instruments: As of December 31, 2018 As of December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities Derivatives designated as hedges: Cash flow hedges: Interest rate swaps $ 916.6 $ 1.5 $ — $ 968.1 $ 1.5 $ 1.4 Foreign currency swaps 801.3 115.4 3.1 686.2 75.5 5.6 Total derivatives designated as hedges $ 1,717.9 $ 116.9 $ 3.1 $ 1,654.3 $ 77.0 $ 7.0 Derivatives not designated as hedges: Index options $ 8,231.5 $ 61.8 $ 0.6 $ 6,696.1 $ 261.9 $ 1.5 Embedded derivatives – Indexed products — — 871.5 — — 797.5 Embedded derivative – Closed Block (1) — 67.0 — — — — Other derivatives 25.2 0.2 0.7 22.2 0.2 — Total derivatives not designated as hedges 8,256.7 129.0 872.8 6,718.3 262.1 799.0 Total derivatives $ 9,974.6 $ 245.9 $ 875.9 $ 8,372.6 $ 339.1 $ 806.0 _______________________ (1) Changes in the fair value of the embedded derivative related to the Closed Block are recorded as an adjustment to the funds withheld liability on the consolidated balance sheets. Equity Market Contracts and Embedded Derivatives – Indexed Products The Company uses indexed call options and futures as part of its equity market risk management strategy. The Company offers FIA and indexed UL products that permit the contract holder to allocate all or a portion of their account value that credits interest based on the performance of an index, subject to caps or performance margins set by the Company. The contract holders may elect to rebalance index options at renewal dates, typically annually. As of each renewal date, the Company has the opportunity to re-price the indexed component by establishing revised cap rates or performance margins, subject to contractual guarantees. The Company transacts in call options according to the portfolio allocation decisions of the contract holders, such that the Company is economically hedged with respect to equity returns for the current interest term. These derivatives are not designated for hedge accounting. The index-based crediting feature in these contracts is an embedded derivative instrument that is bifurcated from the host contract for measurement purposes, because it possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract. Foreign Currency Contracts The Company uses foreign currency swaps and forwards as part of its foreign currency risk management strategy, to reduce exchange risk with respect to the Company's investments denominated in foreign currencies. In a foreign currency swap transaction, the Company agrees with other parties to exchange, at specified intervals, one currency for another at a specified rate of exchange. Generally, the notional amount of each currency is exchanged at the maturity of the currency swap by each party. These derivatives qualify and are designated as cash flow hedges, and accumulated gains (losses) are reclassified into income when interest and principal payments on the underlying foreign bonds are received. Interest Rate Swaps The Company uses interest rate swaps as part of its interest rate risk management strategy. In an interest rate swap, the Company agrees with other parties to exchange, at specified intervals, the difference between floating-rate and fixed-rate interest amounts calculated by reference to an agreed upon notional principal amount. The Company primarily uses interest rate swaps to synthetically convert variable rate fixed maturities, including investments in collateralized loan obligations, to fixed rate securities. These derivatives qualify and are designated as cash flow hedges, and accumulated gains (losses) are reclassified into income when interest payments on the underlying bonds are received. Collateral Arrangements and Offsetting of Financial Instruments The Company's derivative contracts are typically governed by an International Swaps and Derivatives Association (ISDA) Master Agreement. For each Master Agreement, the Company and the counterparty have also entered into a credit support annex (CSA) to reduce the risk of counterparty default in derivative transactions by requiring the posting of cash collateral or other financial assets. The CSA requires either party to post collateral when net exposures from all derivative contracts between the parties exceed pre-determined contractual thresholds, which vary by counterparty. The amount of net exposure is the difference between the derivative contract's fair value and the fair value of the collateral held for such agreements with each counterparty. Collateral amounts required to be posted or received are determined daily based on the net exposure with each counterparty under a master netting agreement. The Company does not offset recognized collateral amounts pledged or received against the fair value amounts recognized for derivative contracts. For certain centrally-cleared instruments, the Company is required to post initial margin, which is determined at contract inception, as well as variation margin, which is based on the fair value of the derivative contracts and generally determined on a daily basis. As of December 31, 2018 and 2017 , the Company posted initial margin of $21.3 and $33.5 , respectively, related to its centrally-cleared derivatives. These amounts are not reflected in collateral presented in the tables below. Certain exchanges legally characterize variation margin payments as settlements as opposed to collateral for centrally cleared derivatives. As a result, the variation margin for these securities reduces the fair value of the derivative recorded in the consolidated balance sheets. In the consolidated balance sheets, the Company recognizes cash collateral received in cash and cash equivalents, and the obligation to return cash collateral in other liabilities. Non-cash collateral received is not recognized in the consolidated balance sheets. In the event of default, the counterparty relinquishes claim to the assets pledged as collateral, and the Company recognizes the collateral as its own asset recorded at fair value, or, in the case of cash collateral, derecognizes its obligation to return collateral. The following tables present the potential effect of netting arrangements by counterparty on the Company's consolidated balance sheets: As of December 31, 2018 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Balance Sheets Financial Instruments (1) Cash Collateral Received Net Amount Counterparty: Assets: A $ 18.1 $ (2.6 ) $ (15.5 ) $ — B 60.1 (0.6 ) (59.5 ) — C 18.7 — (18.7 ) — E 11.8 — (11.8 ) — G 15.9 — (15.6 ) 0.3 H 11.0 (0.5 ) (10.5 ) — I 16.3 — (16.0 ) 0.3 Other 27.0 (0.7 ) (24.1 ) 2.2 Total derivative assets (2) $ 178.9 $ (4.4 ) $ (171.7 ) $ 2.8 _______________________ (1) Represents amount of offsetting derivative liabilities that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative assets for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty. As of December 31, 2018 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Financial Instruments (1) Cash Collateral Posted Net Amount Counterparty: Liabilities: A $ 2.6 $ (2.6 ) $ — $ — B 0.6 (0.6 ) — — H 0.5 (0.5 ) — — Other 0.7 (0.7 ) — — Total derivative liabilities (2) $ 4.4 $ (4.4 ) $ — $ — _______________________ (1) Represents amount of offsetting derivative assets that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative liabilities for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty. As of December 31, 2017 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Balance Sheets Financial Instruments (1) Cash Collateral Received Net Amount Counterparty: Assets: A $ 46.1 $ (4.2 ) $ (41.9 ) $ — B 63.6 (1.4 ) (62.2 ) — C 13.2 — (13.2 ) — E 21.3 — (21.3 ) — F 31.6 (1.3 ) (29.0 ) 1.3 G 30.2 — (30.2 ) — H 51.9 (1.0 ) (50.9 ) — I 34.6 — (32.9 ) 1.7 J 42.7 — (42.7 ) — Other 3.9 (0.6 ) (3.3 ) — Total derivative assets $ 339.1 $ (8.5 ) $ (327.6 ) $ 3.0 _______________________ (1) Represents amount of offsetting derivative liabilities that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative assets for presentation on the consolidated balance sheets. As of December 31, 2017 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Financial Cash Collateral Posted Net Amount Counterparty: Liabilities: A $ 4.2 $ (4.2 ) $ — $ — B 1.4 (1.4 ) — — F 1.3 (1.3 ) — — Other 1.6 (1.6 ) — — Total derivative liabilities (2) $ 8.5 $ (8.5 ) $ — $ — _______________________ (1) Represents amount of offsetting derivative assets that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative liabilities for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty. Derivatives Designated as Hedges The following table presents the amount of gain (loss) recognized in OCI on derivatives qualifying and designated as cash flow hedges: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Interest rate swaps $ (3.3 ) $ (2.9 ) $ (18.9 ) $ 11.3 Foreign currency swaps 46.5 (64.6 ) 62.5 29.1 Total $ 43.2 $ (67.5 ) $ 43.6 $ 40.4 See Note 10 for amounts reclassified out of AOCI into net income. The Company expects to reclassify net gains of $6.0 from AOCI into net income in the next 12 months. Actual amounts may vary from this estimate as a result of market conditions. As of December 31, 2018 , the maximum term over which the Company is hedging its exposure to the variability in future cash flows is approximately 22 years. For the year ended December 31, 2018 , net realized losses of $0.3 were recognized related to hedge ineffectiveness, while for the year ended December 31, 2017 , gains of $1.6 were recorded. For the period February 1 to December 31, 2016 , losses of $1.9 were recorded. For the period January 1 to January 31, 2016, no material hedge ineffectiveness was recorded. Derivatives Not Designated as Hedges The following table shows the effect of derivatives not designated as hedges in the consolidated statements of income (loss), which is recorded in net realized gains (losses): Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Index options $ (141.1 ) $ 170.0 $ 84.3 $ (33.2 ) Interest rate swaps 3.2 0.9 (0.3 ) 3.7 Total return swaps (47.4 ) (4.3 ) (22.8 ) — Futures (13.1 ) 3.7 0.8 — Embedded derivatives – Indexed products 88.5 (118.6 ) (84.5 ) 29.4 Embedded derivative – Closed Block 67.0 — — — Other derivatives — 0.3 1.4 0.1 Total $ (42.9 ) $ 52.0 $ (21.1 ) $ —

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	7. Fair Value of Financial Instruments The Company determines the fair value of its financial instruments based on the fair value hierarchy, which favors the use of observable inputs over the use of unobservable inputs. The Company has categorized its financial instruments into the three-level hierarchy, which gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The level assigned to a fair value measurement is based on the lowest-level input that is significant to the measurement. The fair value measurements for the Company's financial instruments are categorized as follows: • Level 1 — Unadjusted quoted prices in active markets for identical instruments. • Level 2 — Quoted prices for similar instruments in active markets and model-derived valuations whose inputs are observable. This category includes financial instruments that are valued using industry-standard pricing methodologies or models. All significant inputs are observable or derived from observable information in the marketplace. • Level 3 — Fair value estimates whose significant inputs are unobservable. This includes financial instruments for which fair value is estimated based on industry-standard pricing methodologies and internally developed models utilizing significant inputs not based on or corroborated by readily available market information. In limited circumstances, this may also utilize estimates based on non-binding broker quotes. The following tables present the fair value of the Company's financial instruments classified by the valuation hierarchy described above. The financial instruments are separated between those measured at fair value on a recurring basis and those not carried at fair value, but for which disclosure of fair value is required. As of December 31, 2018 Carrying Amount Fair Value Level 1 Level 2 Level 3 Measured at fair value on a recurring basis: Financial assets: Fixed maturities, available-for-sale: U.S. government and agencies $ 432.8 $ 432.8 $ — $ 432.8 $ — State and political subdivisions 728.9 728.9 — 728.9 — Corporate securities 23,691.4 23,691.4 — 23,405.8 285.6 Residential mortgage-backed securities 2,381.2 2,381.2 — 2,381.2 — Commercial mortgage-backed securities 858.4 858.4 — 858.4 — Collateralized loan obligations 912.6 912.6 — 912.6 — Other debt obligations 1,174.0 1,174.0 — 1,123.2 50.8 Total fixed maturities, available-for-sale 30,179.3 30,179.3 — 29,842.9 336.4 Fixed maturities, trading 1,095.8 1,095.8 — 1,095.8 — Marketable equity securities 97.7 97.7 85.2 12.0 0.5 Derivatives: Index options 61.8 61.8 — 61.8 — Foreign currency swaps 115.4 115.4 — 115.4 — Other 1.7 1.7 0.2 1.5 — Total derivatives 178.9 178.9 0.2 178.7 — Total investments carried at fair value 31,551.7 31,551.7 85.4 31,129.4 336.9 Embedded derivative – Closed Block 67.0 67.0 — — 67.0 Separate account assets 904.3 904.3 904.3 — Total assets at fair value $ 32,523.0 $ 32,523.0 $ 989.7 $ 31,129.4 $ 403.9 Financial liabilities: Embedded derivatives – Indexed products $ 871.5 $ 871.5 $ — $ — $ 871.5 Subject to fair value disclosure requirements: Financial assets: Mortgage loans $ 6,485.1 $ 6,349.0 $ — $ — $ 6,349.0 Investments in limited partnerships, tax credit investments (1) 130.1 122.0 — — 122.0 Cash and cash equivalents 227.3 227.3 227.3 — — Deposit asset 5,920.4 6,750.4 — — 6,750.4 Financial liabilities: Funds held under deposit contracts (2): Deferred annuities $ 22,797.7 $ 21,946.8 $ — $ — $ 21,946.8 Income annuities 474.6 470.4 — — 470.4 Closed Block 6,594.4 6,750.4 — — 6,750.4 Funds withheld liability (3) 5,656.9 6,084.5 — — 6,084.5 _______________________ (1) Fair value includes obligations for future investment contributions of $8.4 , which is reflected as a liability on the consolidated balance sheets. (2) The carrying value of this balance excludes $8,407.6 of liabilities related to insurance contracts and embedded derivatives. (3) The carrying value of this balance excludes $(67.0) related to the Closed Block embedded derivative. As of December 31, 2017 Carrying Amount Fair Value Level 1 Level 2 Level 3 Measured at fair value on a recurring basis: Financial assets: Fixed maturities, available-for-sale: U.S. government and agencies $ 422.2 $ 422.2 $ — $ 422.2 $ — State and political subdivisions 792.4 792.4 — 792.4 — Corporate securities 23,932.2 23,932.2 — 23,731.4 200.8 Residential mortgage-backed securities 2,472.8 2,472.8 — 2,472.8 — Commercial mortgage-backed securities 795.7 795.7 — 795.6 0.1 Collateralized loan obligations 1,146.6 1,146.6 — 1,146.6 — Other debt obligations 719.4 719.4 — 677.9 41.5 Total fixed maturities, available-for-sale 30,281.3 30,281.3 — 30,038.9 242.4 Marketable equity securities 755.7 755.7 722.6 26.8 6.3 Derivatives: Index options 261.9 261.9 — 222.4 39.5 Foreign currency swaps 75.5 75.5 — 75.5 — Other 1.7 1.7 0.2 1.5 — Total derivatives 339.1 339.1 0.2 299.4 39.5 Total investments carried at fair value 31,376.1 31,376.1 722.8 30,365.1 288.2 Separate account assets 978.1 978.1 978.1 — — Total assets at fair value $ 32,354.2 $ 32,354.2 $ 1,700.9 $ 30,365.1 $ 288.2 Financial liabilities: Embedded derivatives – Indexed products $ 797.5 $ 797.5 $ — $ — $ 797.5 Subject to fair value disclosure requirements: Financial assets: Mortgage loans $ 6,241.2 $ 6,180.8 $ — $ — $ 6,180.8 Investments in limited partnerships, tax credit investments (1) 173.0 135.1 — — 135.1 Cash and cash equivalents 347.5 347.5 347.5 — — Financial liabilities: Funds held under deposit contracts (2): Deferred annuities $ 20,128.3 $ 19,943.3 $ — $ — $ 19,943.3 Closed Block 7,202.5 8,080.5 — — 8,080.5 _______________________ (1) Fair value includes obligations for future investment contributions of $32.8 , which is reflected as a liability on the consolidated balance sheets. (2) The carrying value of this balance excludes $8,015.1 of liabilities related to insurance contracts and embedded derivatives. Financial Instruments Measured at Fair Value on a Recurring Basis Fixed Maturities The vast majority of the Company's fixed maturities, including both available-for-sale and trading, have been classified as Level 2 measurements. To make this assessment, the Company determines whether the market for a security is active and if significant pricing inputs are observable. The Company predominantly utilizes third-party independent pricing services to assist management in determining the fair value of its fixed maturity securities. As of both December 31, 2018 and 2017 , pricing services provided prices for 94.4% of the Company's fixed maturities. As of December 31, 2018 , the Company had $1,576.9 , or 5.0% , of its available-for-sale fixed maturities invested in private placement securities. These securities were generally valued using a composite of observed comparable public securities as well as reference yield curves. The yield curves are determined based on industry, credit quality, seniority rank in the capital structure, and residual spreads determined by the Company's independent pricing service for each security. The residual spreads are considered unobservable inputs and classified as a Level 3 measurement when they are significant to the valuation result. When only observable inputs are significant to the valuation result, they are classified as Level 2 measurements. The use of only significant observable inputs in determining the fair value of the Company's investments in private placement securities resulted in the classification of $1,303.6 , or 82.7% , as Level 2 measurements as of December 31, 2018 . As of December 31, 2017 , the Company had $1,509.0 , or 5.0% , of its fixed maturities invested in private placement securities, of which $1,325.9 , or 87.9% , were classified as Level 2 measurements. Corporate Securities The majority of corporate securities classified as Level 2 measurements are priced by independent pricing services utilizing evaluated pricing models. Because many corporate securities do not trade on a daily basis, evaluated pricing models apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing to prepare valuations. The significant inputs for security evaluations include benchmark yields, reported trades, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and other reference data, including market research publications. Residential Mortgage-backed Securities The Company's residential mortgage-backed securities (RMBS) classified as Level 2 measurements are priced by pricing services that utilize evaluated pricing models. Because many RMBS do not trade on a daily basis, evaluated pricing models apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing to prepare evaluations. The significant observable inputs for security evaluations include benchmark yields, reported trades, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and other reference data, including market research publications. In addition, the pricing services use models and processes to develop prepayment and interest rate scenarios. The pricing services monitor market indicators, industry and economic events, and their models take into account market convention. Marketable Equity Securities Marketable equity securities have historically included exchange traded funds and common stock in support of long duration income annuity policies. The majority of the Company's equity investments were sold in connection with the Reinsurance Transaction. When the fair values of the Company's marketable equity securities are based on quoted market prices in active markets for identical assets, they are classified as Level 1 measurements. The fair values of nonredeemable preferred stocks are determined by pricing services utilizing evaluated pricing models and are classified as a Level 2 measurement. These valuations are created based on benchmark curves using industry standard inputs and exchange prices of underlying securities and common stock of the same issuer. Index Options Index options consist primarily of Standard & Poor's 500 Index ® (S&P 500) options. The fair values of these index options were determined using option pricing models. Significant inputs include index implied volatilities, index dividend yields, index prices, a risk-free rate, option term and option strike price. As these inputs are observable, most index options are classified as a Level 2 measurement. Foreign Currency Swaps Foreign currency swaps are valued using an income approach. These swaps are priced using a discounted cash flow model. The significant inputs include the projected cash flows, currency spot rates, swap yield curve and cross currency basis curve. As these inputs are observable, the foreign currency swaps valuation is classified as a Level 2 measurement. Separate Accounts Separate account assets are primarily invested in mutual funds with published NAVs, which are classified as a Level 1 measurement. Embedded Derivatives Embedded derivatives primarily relate to the Company's indexed products, which credits interest to the policyholder's account balance based on increases in selected indexes, primarily the S&P 500. The fair value of the embedded derivative reflects the excess of the projected benefits based on the indexed fund value over the projected benefits based on the guaranteed fund value. The excess benefits are projected using best estimates for surrenders, mortality and indexed fund interest, and discounted at a risk-free rate plus a spread for nonperformance and policyholder behavior risk. The Company updates its estimates regarding projected benefits during the third quarter each year as part of its annual unlocking of various assumptions used to determine the fair value. This resulted in an increase of $36.4 to the fair value of the embedded derivative for 2018, which was recorded as a loss in net realized gains (losses). For the same period in 2017, this resulted in a decrease of $28.9 to the fair value of the embedded derivative, which was recorded as a gain in net realized gains (losses). The Reinsurance Transaction also contains an embedded derivative related to the withheld assets supporting the Closed Block annuity contracts. The embedded derivative is primarily measured as the change in the market-over-book value of the assets supporting the Closed Block, which includes both fixed maturities and commercial mortgage loans. Because the fair value measurement of these estimates utilizes significant unobservable inputs, the Company classifies the valuation of embedded derivatives as a Level 3 measurement. Rollforward of Financial Instruments Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2018 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2018 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2018 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 200.8 $ 26.4 $ — $ 78.4 $ (4.7 ) $ — $ (15.3 ) $ — $ 285.6 Commercial mortgage-backed securities 0.1 — — — (0.1 ) — — — — Other debt obligations 41.5 12.1 — — 0.1 — (2.9 ) — 50.8 Total fixed maturities, available-for-sale 242.4 38.5 — 78.4 (4.7 ) — (18.2 ) — 336.4 Marketable equity securities 6.3 — — (5.8 ) — — — — 0.5 Derivatives: Index options 39.5 — — (38.7 ) — 0.9 — (1.7 ) — Embedded derivative – Closed Block — — — — — 67.0 — — 67.0 Total Level 3 assets $ 288.2 $ 38.5 $ — $ 33.9 $ (4.7 ) $ 67.9 $ (18.2 ) $ (1.7 ) $ 403.9 Financial Liabilities: Embedded derivatives – Indexed products $ 797.5 $ 179.4 $ (16.9 ) $ — $ — $ (88.5 ) $ — $ — $ 871.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into Level 3 are generally the result of observable market information on a security no longer being available or utilized by pricing vendors. Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $81.9 for the year ended December 31, 2018 . Gross transfers out of Level 3 were $48.0 for the year ended December 31, 2018 . (3) Other includes transactions such as pay downs, calls, amortization, and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss). The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2017 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2017 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2017 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 57.0 $ 87.9 $ — $ 57.2 $ (9.0 ) $ — $ 7.8 $ (0.1 ) $ 200.8 Commercial mortgage-backed securities 0.9 — — — (0.8 ) — — — 0.1 Other debt obligations 7.6 — — 28.7 0.7 — 4.5 — 41.5 Total fixed maturities, available-for-sale 65.5 87.9 — 85.9 (9.1 ) — 12.3 (0.1 ) 242.4 Marketable equity securities 5.9 — — 0.1 — — 0.3 — 6.3 Derivatives: Index options 7.0 22.7 — — (14.5 ) 26.0 — (1.7 ) 39.5 Other — 0.9 — — (0.6 ) — — (0.3 ) — Total derivatives 7.0 23.6 — — (15.1 ) 26.0 — (2.0 ) 39.5 Total Level 3 assets $ 78.4 $ 111.5 $ — $ 86.0 $ (24.2 ) $ 26.0 $ 12.6 $ (2.1 ) $ 288.2 Financial Liabilities: Embedded derivatives – Indexed products $ 532.4 $ 162.6 $ (8.0 ) $ — $ (8.1 ) $ 118.6 $ — $ — $ 797.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $86.0 for the year ended December 31, 2017 . Gross transfers out of Level 3 were $0.0 for the year ended December 31, 2017 . (3) Other includes transactions such as pay downs, calls, amortization and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss).

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA)	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA)	8. Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA) The Company defers costs that are directly related to the successful acquisition or renewal of insurance contracts. These primarily include commissions, distribution costs directly related to sales, third-party underwriting costs and the portion of salaries and benefits directly related to processing successful new and renewal contracts. All other acquisition-related costs, including costs incurred for soliciting potential customers, managing the distribution and underwriting functions, training, administration, unsuccessful acquisition or renewal efforts, market research and product development are not deferrable and are expensed in the period incurred. In addition, on the date of the Merger, the Company's DAC balance was reset to zero, and a balance for VOBA was established, representing the right to receive future gross profits from cash flows and earnings of the Company's existing business. VOBA was based on the actuarially estimated present value of future cash flows from the Company's insurance policies and annuity contracts in-force on the date of the Merger. The estimated present value of future cash flows used in the calculation of VOBA was based on certain assumptions, including lapse rates, mortality experience, maintenance expenses, crediting rates, and investment performance that the Company expects to experience in future years. The Company amortizes DAC and VOBA for deferred annuity contracts and universal life insurance policies over the lives of the contracts or policies in proportion to the estimated future gross profits. To estimate future gross profits, the Company makes assumptions as to lapse rates, mortality experience, maintenance expenses, crediting rates, and investment performance. Actual profits can vary from the estimates and can thereby result in increases or decreases to DAC and VOBA amortization. The Company regularly evaluates its assumptions and, when necessary, revises the estimated gross profits of these contracts, resulting in assumption and experience unlocking adjustments to DAC and VOBA amortization. When such estimates are revised, the impact is recorded in the consolidated statements of income (loss). The Company amortizes acquisition costs for traditional individual life insurance policies over the premium paying period of the related policies, using assumptions consistent with those used in computing policy reserves. The Company amortizes acquisition costs for immediate annuities using a constant yield approach. The Company adjusts the unamortized DAC and VOBA balances for the effect of net unrealized gains and losses on securities as if they had been realized as of the balance sheet date. The Company includes the impact of this adjustment, net of tax, in AOCI. The Company also adjusts its unamortized DAC and VOBA balances for the effect of realized gains and losses including changes in fair value of the embedded derivatives for the Company's FIA policies. These adjustments are recognized in net realized gains (losses) in the consolidated statements of income (loss). For some products, policyholders can elect to modify product benefits, features, rights or coverage by exchanging a contract for a new contract; by amendment, endorsement or rider to a contract; or by election of a feature or coverage within a contract. These transactions are known as internal replacements. If the modification substantially changes the original contract, the remaining DAC balance is immediately written off through earnings and any eligible costs associated with the replacement contract are deferred. If the modification does not substantially change the contract, the DAC is retained and amortized over the life of the modified contract and any acquisition costs associated with the related modification are expensed as incurred. The following table provides a reconciliation of the beginning and ending balance for DAC: Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Unamortized balance at beginning of period $ 407.2 $ 202.8 $ — $ 677.5 Deferral of acquisition costs 260.6 239.9 215.4 19.6 Adjustments for realized (gains) losses (1) (1.5 ) (4.6 ) (1.6 ) (0.4 ) Amortization – excluding unlocking (39.7 ) (30.9 ) (9.9 ) (8.4 ) Amortization – impact of unlocking (1) (4.1 ) — (1.1 ) (0.2 ) Adjustment for Closed Block (2) (12.6 ) — — — Unamortized balance at end of period 609.9 407.2 202.8 688.1 Accumulated effect of net unrealized (gains) losses 34.4 (21.0 ) (3.4 ) (41.0 ) Balance at end of period $ 644.3 $ 386.2 $ 199.4 $ 647.1 ___________________ (1) Includes the impact of assumption and experience unlocking related to quarterly investment prepayment activity, as well as the Company's annual unlocking process, which takes place during the third quarter of each year. Adjustments for realized (gains) losses also includes the impact from annual unlocking. (2) The DAC balance associated with policies reinsured under the Reinsurance Transaction was reclassified to the beginning balance of the deposit asset. The following table provides a reconciliation of the beginning and ending balance for VOBA: Successor For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 Unamortized balance at beginning of period $ 358.1 $ 413.4 $ 457.6 Adjustments related to realized (gains) losses (1) 10.1 (11.9 ) 4.5 Amortization – excluding unlocking (42.8 ) (41.8 ) (40.7 ) Amortization – impact of unlocking (1) (5.1 ) (1.6 ) (8.0 ) Unamortized balance at end of period 320.3 358.1 413.4 Accumulated effect of net unrealized (gains) losses 58.4 (48.1 ) (16.1 ) Balance at end of period $ 378.7 $ 310.0 $ 397.3 ___________________ (1) Includes the impact of assumption and experience unlocking related to quarterly investment prepayment activity, as well as the Company's annual unlocking process, which takes place during the third quarter of each year. Adjustments for realized (gains) losses also includes the impact from annual unlocking. The following table sets forth the estimated future VOBA amortization expense, net of interest, for the next 5 years, based on the balance recorded as of December 31, 2018: Year Amount 2019 $ 40.3 2020 35.0 2021 29.8 2022 24.3 2023 18.2

Liability for Unpaid Claims and

Liability for Unpaid Claims and Claim Adjustment Expenses	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Liability for Unpaid Claims and Claim Adjustment Expenses	9. Liability for Unpaid Claims and Claim Adjustment Expenses Liabilities for policy and contract claims primarily represent liabilities for claims under medical stop-loss, group life and DI, and individual life policies. These liabilities are established on the basis of reported losses. The Company also provides for claims incurred but not reported (IBNR). For medical stop-loss and group life and DI policies, this is based on expected loss ratios, claims paying completion patterns and historical experience. If expected loss ratios increase or expected claims paying completion patterns extend, the IBNR claim liability increases. The Company reviews estimates for reported but unpaid claims and IBNR claims quarterly. Any necessary adjustments are reflected in earnings. The following tables provide reconciliations of the beginning and ending liability balances for unpaid claims and claims adjustment expenses (CAE) disaggregated by medical stop-loss, group life and DI, and other. These reserves include policy and contract claims and certain amounts recorded in future policy benefits on the consolidated balance sheets. Medical Stop-Loss Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Balance, beginning of period $ 153.1 $ 114.6 $ 113.1 $ 122.9 Less: reinsurance recoverables 12.4 7.7 3.4 3.6 Net balance, beginning of period 140.7 106.9 109.7 119.3 Incurred related to insured events of: The current year 502.3 460.6 351.9 28.1 Prior years (2.7 ) 7.5 (5.2 ) (0.5 ) Total incurred 499.6 468.1 346.7 27.6 Paid related to insured events of: The current year 370.1 331.2 276.7 1.9 Prior years 127.2 103.1 72.8 35.3 Total paid 497.3 434.3 349.5 37.2 Net balance, end of period 143.0 140.7 106.9 109.7 Add: reinsurance recoverables 6.4 12.4 7.7 3.4 Balance, end of period $ 149.4 $ 153.1 $ 114.6 $ 113.1 Group Life and DI Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Balance, beginning of period $ 184.2 $ 149.9 $ 122.2 $ 119.8 Less: reinsurance recoverables 41.9 48.4 76.7 76.9 Net balance, beginning of period 142.3 101.5 45.5 42.9 Incurred related to insured events of: The current year 199.7 150.4 122.6 6.8 Prior years (2.2 ) 2.7 5.7 0.5 Total incurred 197.5 153.1 128.3 7.3 Paid related to insured events of: The current year 106.2 79.1 52.5 0.2 Prior years 43.9 33.2 19.8 4.5 Total paid 150.1 112.3 72.3 4.7 Net balance, end of period 189.7 142.3 101.5 45.5 Add: reinsurance recoverables 40.3 41.9 48.4 76.7 Balance, end of period $ 230.0 $ 184.2 $ 149.9 $ 122.2 Successor Company Predecessor Company Other For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to January 31, 2016 Balance, beginning of period $ 29.6 $ 33.0 $ 27.2 $ 24.5 Less: reinsurance recoverables 4.7 6.7 3.8 4.4 Net balance, beginning of period 24.9 26.3 23.4 20.1 Incurred related to insured events of: The current year 118.1 111.0 99.3 7.6 Prior years 3.8 (0.1 ) 4.8 2.5 Total incurred 121.9 110.9 104.1 10.1 Paid related to insured events of: The current year 93.1 93.1 85.4 1.5 Prior years 21.2 19.2 15.8 5.3 Total paid 114.3 112.3 101.2 6.8 Net balance, end of period 32.5 24.9 26.3 23.4 Add: reinsurance recoverables 4.5 4.7 6.7 3.8 Balance, end of period $ 37.0 $ 29.6 $ 33.0 $ 27.2 Claims Development – Short Duration Contracts The Company's short duration contracts primarily include medical stop-loss and group life and DI. The following tables present information about claims development of short-duration contracts as of December 31, 2018, net of reinsurance. The tables also include cumulative claim frequency (presented in whole numbers) and the total of incurred but not reported (IBNR) liabilities plus expected development on reported claims included within the net incurred amounts. Claim frequency for medical stop-loss is measured on an individual claimant basis per policy year. Claim frequency for group life and DI is measured by claim event on an individual basis. The information about incurred and paid claims development for the years ended December 31, 2013 through 2017 is presented as unaudited supplementary information. The recording and paying of claims and related reserves on short duration contracts was not impacted by the Merger, and therefore, the information presented below combines Predecessor and Successor Company for 2016. The tables below present information for the number of years for which claims incurred typically remain outstanding. Medical stop-loss claims are typically paid within two years. Claims for group life and DI tend to develop over a longer period; however, prior to 2013, this business was substantially reinsured and did not materially impact the Company's results. Additionally, during the fourth quarter of 2016, the Company entered into an agreement to recapture the majority of the long-term DI business that had been ceded to a reinsurer, which impacted the retained incurred claims in later contract years. Prior to the recapture, long-term DI business was generally reinsured at 45% to 90% , depending on year of issue, and prior period amounts have not been adjusted to reflect the recapture. Medical Stop-Loss For the Years Ended December 31, As of December 31, 2018 Related IBNR Reserves Cumulative Number of Reported Claims Year of Insured Event 2017 2018 Incurred Claims, Net of Reinsurance: 2017 $ 460.6 $ 466.6 $ 8.5 5,753 2018 502.3 105.4 3,079 Total $ 968.9 $ 113.9 Cumulative Paid Claims, Net of Reinsurance: 2017 $ 331.2 $ 455.8 2018 370.1 Total 825.9 Liabilities for unpaid claims prior to 2016, net of reinsurance — Total liabilities for unpaid claims, net of reinsurance $ 143.0 Group Life and DI For the Years Ended December 31, As of December 31, 2018 2013 2014 2015 2016 2017 Related IBNR Reserves Cumulative Number of Reported Claims Year of Insured Event (Unaudited) 2018 Incurred Claims, Net of Reinsurance: 2013 $ 21.9 $ 23.5 $ 23.0 $ 26.6 $ 27.5 $ 27.7 $ — 1,613 2014 41.3 42.1 56.2 56.1 58.0 — 3,895 2015 73.6 92.1 90.8 90.0 — 5,702 2016 106.5 105.6 103.5 — 6,889 2017 157.9 153.1 5.1 9,714 2018 208.1 50.5 11,506 Total $ 640.4 $ 55.6 Cumulative Paid Claims, Net of Reinsurance: 2013 $ 15.1 $ 19.7 $ 21.3 $ 22.0 $ 22.8 $ 23.2 2014 25.3 32.6 35.9 39.8 42.3 2015 39.9 57.1 66.1 69.8 2016 53.4 74.2 80.1 2017 80.7 112.0 2018 106.2 Total $ 433.6 Liabilities for unpaid claims prior to 2013, net of reinsurance 2.4 Total liabilities for unpaid claims, net of reinsurance $ 209.2 Reconciliation The reconciliation of the December 31, 2018 net incurred and paid claims development tables to the unpaid claims liability is as follows: Reconciliation of the Claims Development Information to the Liability for Unpaid Claims and CAE As of December 31, 2018 Net outstanding liabilities for unpaid claims Medical Stop-Loss $ 143.0 Group Life and DI 209.2 Other 4.1 Liabilities for unpaid claims, net of reinsurance 356.3 Reinsurance recoverable on unpaid claims Medical Stop-Loss 6.4 Group Life and DI 40.3 Other — Total reinsurance recoverable on unpaid claims 46.7 Insurance lines other than short duration, net 32.9 Impact of discounting (19.5 ) Total gross liability for unpaid claims $ 416.4 Claims Duration and Payout The following is required unaudited supplementary information about average historical percentage payout of incurred claims by age, net of reinsurance. The calculation uses the amount of claims paid in each development year compared with the estimated incurred claims as of December 31, 2018: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Group Life and DI 49.7 % 17.8 % 6.7 % 4.5 % 3.5 % 1.5 %

Stockholder's Equity

Stockholder's Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Stockholder's Equity	10. Stockholder's Equity Components of AOCI primarily relate to unrealized gains (losses) on the Company's available-for-sale securities and derivatives designated as cash flow hedges, as well as the related adjustments to DAC and VOBA. These amounts are reported net of deferred taxes. The tax effects are released from AOCI into income tax expense (benefit) when the underlying amounts are reclassified to income, typically when the related instrument is sold, terminated or otherwise extinguished. The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the year ended December 31, 2018 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2018 $ 642.7 $ (0.3 ) $ (63.6 ) $ (27.7 ) $ 551.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) (959.8 ) (0.9 ) 157.0 34.1 (769.6 ) Reclassifications recorded in: Net investment income: Interest rate swaps — — — (2.0 ) (2.0 ) Foreign currency swaps — — — 5.0 5.0 Net realized (gains) losses 18.6 — (9.4 ) 3.1 12.3 Total provision (benefit) for income taxes (3.9 ) — 2.0 (1.3 ) (3.2 ) Total reclassifications from AOCI, net of taxes 14.7 — (7.4 ) 4.8 12.1 Other comprehensive income (loss) after reclassifications (945.1 ) (0.9 ) 149.6 38.9 (757.5 ) Adoption of new accounting standard (3) (114.3 ) — — — (114.3 ) Balance as of December 31, 2018 $ (416.7 ) $ (1.2 ) $ 86.0 $ 11.2 $ (320.7 ) ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $(255.1) , $(0.3) , $41.8 , $9.0 , and $(204.6) , respectively, for the year ended December 31, 2018 . Tax effects in OCI are calculated based on the applicable enacted tax rate at the time gains (losses) are incurred. (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income. (3) Accounting Standards Update No. 2016-01, Financial Instruments (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities. Refer to Note 2 for further discussion. (4) Includes net unrealized losses of $42.0 for the year ended December 31, 2018 related to changes in exchange rates on fixed maturities held in foreign currencies. The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the year ended December 31, 2017 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2017 $ 137.6 $ (0.2 ) $ (14.0 ) $ 17.7 $ 141.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) 432.9 (0.1 ) (52.7 ) (44.5 ) 335.6 Reclassifications recorded in: Net investment income: Interest rate swaps — — — 0.1 0.1 Foreign currency swaps — — — (2.7 ) (2.7 ) Net realized (gains) losses (32.9 ) — 16.6 7.8 (8.5 ) Total provision (benefit) for income taxes 11.5 — (5.8 ) (1.8 ) 3.9 Total reclassifications from AOCI, net of taxes (21.4 ) — 10.8 3.4 (7.2 ) Other comprehensive income (loss) after reclassifications 411.5 (0.1 ) (41.9 ) (41.1 ) 328.4 Adoption of new accounting standard (3) 93.6 — (7.7 ) (4.3 ) 81.6 Balance as of December 31, 2017 $ 642.7 $ (0.3 ) $ (63.6 ) $ (27.7 ) $ 551.1 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $201.9 , $0.0 , $(22.8) , $(23.0) , and $156.1 , respectively, for the period year ended December 31, 2017 . Tax effects in OCI are calculated based on the applicable enacted tax rate at the time gains (losses) are incurred. (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income (loss). (3) Accounting Standards Update No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the period February 1 to December 31, 2016 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of February 1, 2016 $ — $ — $ — $ — $ — Other comprehensive income (loss) before reclassifications, net of taxes (1) 128.6 (0.3 ) (11.5 ) 28.3 145.1 Reclassifications recorded in: Net investment income: Interest rate swaps — — — (6.6 ) (6.6 ) Foreign currency swaps — — — (9.0 ) (9.0 ) Net realized (gains) losses 13.8 0.1 (3.7 ) (0.8 ) 9.4 Total provision (benefit) for income taxes (4.8 ) — 1.2 5.8 2.2 Total reclassifications from AOCI, net of taxes 9.0 0.1 (2.5 ) (10.6 ) (4.0 ) Other comprehensive income (loss) after reclassifications 137.6 (0.2 ) (14.0 ) 17.7 141.1 Balance as of December 31, 2016 $ 137.6 $ (0.2 ) $ (14.0 ) $ 17.7 $ 141.1 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $69.3 , $(0.1) , $(6.3) , $15.3 , and $78.2 , respectively, for the period February 1 to December 31, 2016 . (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income. The following table summarizes the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the period January 1 to January 31, 2016 (Predecessor Company): Net Unrealized Gains (Losses) on Available-for- sale Securities OTTI on Fixed Maturities not related to Credit Losses (2) Adjustment for DAC Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2016 $ 521.7 $ (17.7 ) $ (28.1 ) $ 42.2 $ 518.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) 111.6 — (24.7 ) 26.2 113.1 Reclassifications recorded in: Net investment income: Interest rate swaps — — — (0.6 ) (0.6 ) Foreign currency swaps — — — (1.0 ) (1.0 ) Net realized (gains) losses 2.6 — 0.5 — 3.1 Total provision (benefit) for income taxes (0.9 ) — (0.2 ) 0.6 (0.5 ) Total reclassifications from AOCI, net of taxes 1.7 — 0.3 (1.0 ) 1.0 Other comprehensive income (loss) after reclassifications 113.3 — (24.4 ) 25.2 114.1 Balance as of January 31, 2016 $ 635.0 $ (17.7 ) $ (52.5 ) $ 67.4 $ 632.2 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $60.1 , $0.0 , $(13.3) , $14.2 , and $61.0 , respectively, for the period January 1 to January 31, 2016 . (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies Leases The Company has office space and certain equipment under leases that expire at various dates through 2025, subject to certain renewal options. The Company accounts for these leases primarily as operating leases. Future minimum lease commitments, including cost escalation clauses, for the next five years and thereafter are as follows: Lease Payments 2019 $ 10.2 2020 9.3 2021 5.1 2022 2.9 2023 2.3 Thereafter 3.2 Total $ 33.0 Litigation Because of the nature of its business, the Company is subject to legal actions filed or threatened in the ordinary course of its business operations. The Company establishes liabilities for litigation and regulatory actions when it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. For matters where a loss is believed to be reasonably possible, but not probable, no liability is established. For such matters, the Company may provide an estimate of the possible loss or range of loss or a statement that such an estimate cannot be made. The Company reviews relevant information with respect to litigation and regulatory matters on a quarterly basis and updates its established liabilities, disclosures and estimates of reasonably possible losses or range of loss based on such reviews. Although the Company cannot predict the outcome of any litigation or regulatory action, the Company does not believe that any such matters will have an impact on its financial condition or results of operations that differs materially from the Company’s established liabilities. Given the inherent difficulty in predicting the outcome of such matters, however, it is possible that an adverse outcome in certain such matters could be material to the Company’s financial condition or results of operations for any particular reporting period. Surplus Note On December 12, 2014, Symetra Life and its wholly-owned subsidiary, Symetra Reinsurance Corporation (SRC), entered into a 25 -year transaction to finance certain non-economic statutory reserves related to a block of universal life insurance policies with secondary guarantees issued by Symetra Life. As part of this transaction, SRC issued a surplus note with no initial principal balance. The maximum borrowing capacity as of December 31, 2018 was $100.7 . There have been no borrowings since inception under the surplus note. Other Commitments As of December 31, 2018 and 2017 , unfunded mortgage loan commitments were $65.9 and $53.2 , respectively. The Company had no other material commitments or contingencies as of December 31, 2018 and 2017 .

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	12. Segment Information The Company offers a broad range of products and services that include retirement, employment-based benefits, and life insurance products. These operations are managed separately as three divisions. In the third quarter 2018, and as a result of the Reinsurance Transaction, the Company revised its segments into three business segments based on product groupings and information used by management: Benefits, Retirement, and Individual Life. The Company also has a four th reportable segment, Other, consisting primarily of unallocated corporate items and surplus investment income. The results from operations related to the business exited through the Reinsurance Transaction are reported as the "Closed Block" and included in the consolidated financial statements. The income (loss) related to the Closed Block is excluded from the profitability measures used by management, which results in more informative financial trends from the Company's core business and better aligns results with how the Company manages its segments. Prior period results have been adjusted to reflect this change. The primary profitability measure that management uses to manage business segment results is adjusted pre-tax income (loss), which is defined as income from operations excluding results of the Closed Block, intangible asset amortization, and certain net realized gains (losses). Excluded gains (losses) are associated with: ◦ investment sales or disposal, ◦ investment impairments, ◦ changes in the fair value of mark-to-market investments and derivative investments (except for certain index options discussed below), and ◦ changes in the fair value of embedded derivatives related to the Company's indexed products. In the Retirement segment, net gains (losses) on certain index options purchased to economically hedge exposure from FIA products sold in the late 1990s are included in adjusted pre-tax income. The accounting policies of the segments are the same as those described for the Company, except for the method of capital allocation. The Company has an internally developed risk-based capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. This model accounts for the unique and specific nature of the risks inherent in the Company’s segments. A portion of net investment income on surplus investments, but not the invested assets, is allocated to the segments based on the level of allocated capital. The following table presents selected financial information by segment and reconciles segment pre-tax adjusted operating income (loss) to amounts reported in the consolidated statements of income (loss): Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Segment adjusted pre-tax income (loss): Benefits $ 52.4 $ 34.3 $ 35.8 $ 7.9 Retirement 111.7 106.2 60.8 10.3 Individual Life 16.0 19.9 17.1 0.5 Other (16.6 ) (44.2 ) (62.8 ) (2.8 ) Total segment adjusted pre-tax income 163.5 116.2 50.9 15.9 Add (deduct) the following: Excluded realized gains (losses) (70.4 ) 44.1 (12.5 ) (4.0 ) Amortization of intangible assets (82.8 ) (81.1 ) (74.3 ) — Closed Block results (132.8 ) 35.5 (15.8 ) (24.7 ) Income (loss) from operations before income taxes $ (122.5 ) $ 114.7 $ (51.7 ) $ (12.8 ) The following table presents total adjusted revenue by segment: Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Segment adjusted revenue: Benefits $ 1,014.4 $ 898.0 $ 711.8 $ 61.3 Retirement 782.8 708.9 573.1 58.3 Individual Life 569.3 513.0 420.8 41.7 Other (16.9 ) (41.9 ) (37.1 ) (2.4 ) Total segment adjusted revenue 2,349.6 2,078.0 1,668.6 158.9 Add: Excluded realized gains (losses) (70.4 ) 44.1 (12.5 ) (4.0 ) Add: Closed Block revenue 2.0 336.1 272.5 7.4 Total Revenue $ 2,281.2 $ 2,458.2 $ 1,928.6 $ 162.3 Segment adjusted revenue represents segment revenue excluding certain net realized gains and losses, as described above, and excludes revenue in the Closed Block. The following table presents total assets by segment: As of As of Segment assets: Benefits $ 1,468.4 $ 1,467.3 Retirement 25,077.7 23,968.5 Individual Life 8,005.9 7,836.0 Other 2,356.7 1,769.0 Total segment assets 36,908.7 35,040.8 Add: Closed Block assets (1) 12,052.8 7,513.4 Total Assets $ 48,961.5 $ 42,554.2 ____________________ (1) Includes deposit asset and invested assets related to Closed Block. The following tables provide supplementary insurance information by segment: For the Year Ended December 31, 2018 Premium Revenue Net Investment Income Benefits, Claims, and Interest Credited Amortization of DAC and VOBA Other Underwriting and Operating Expenses Successor Company Benefits $ 979.8 $ 30.3 $ 719.8 $ 5.6 $ 236.6 Retirement — 762.2 470.1 76.3 124.7 Individual Life 33.5 261.7 435.0 8.4 109.9 Other — 28.2 — — (0.3 ) Segment total 1,013.3 1,082.4 1,624.9 90.3 470.9 Add: Closed Block — 123.4 109.8 1.4 21.9 Total $ 1,013.3 $ 1,205.8 $ 1,734.7 $ 91.7 $ 492.8 For the Year Ended December 31, 2017 Premium Revenue Net Investment Income Benefits, Claims, and Interest Credited Amortization of DAC and VOBA Other Underwriting and Operating Expenses Successor Company Benefits $ 867.4 $ 25.7 $ 640.2 $ 2.8 $ 220.7 Retirement — 698.7 426.8 60.8 115.1 Individual Life 32.1 242.1 385.6 8.7 98.8 Other — 14.3 — — 2.3 Segment total 899.5 980.8 1,452.6 72.3 436.9 Add: Closed Block — 303.3 279.7 2.0 15.6 Total $ 899.5 $ 1,284.1 $ 1,732.3 $ 74.3 $ 452.5 February 1 to December 31, 2016 Premium Revenue Net Investment Income Benefits, claims, and interest credited Amortization of DAC and VOBA Underwriting and operating expenses Successor Company Benefits $ 686.7 $ 18.8 $ 497.6 $ 0.6 $ 177.8 Retirement — 579.5 357.6 56.5 98.2 Individual Life 30.8 202.9 313.9 1.9 87.9 Other — 11.3 — — 25.7 Segment total 717.5 812.5 1,169.1 59.0 389.6 Add: Closed Block — 288.8 267.5 0.7 17.0 Total $ 717.5 $ 1,101.3 $ 1,436.6 $ 59.7 $ 406.6 January 1 to January 31, 2016 Premium Revenue Net Investment Income Benefits, claims, and interest credited Amortization of DAC and VOBA Underwriting and operating expenses Predecessor Company Benefits $ 58.6 $ 2.1 $ 37.1 $ 0.2 $ 16.1 Retirement — 57.3 33.4 6.6 8.0 Individual Life 2.6 22.9 32.7 1.2 7.3 Other — (2.4 ) — — 0.4 Segment total 61.2 79.9 103.2 8.0 31.8 Add: Closed Block — 29.8 30.1 0.6 1.2 Total $ 61.2 $ 109.7 $ 133.3 $ 8.6 $ 33.0 As of December 31, 2018 As of December 31, 2017 DAC and VOBA Future Policy Benefits, Losses, Claims, and Loss Expense (1) Other Policyholders' Funds (2) DAC and VOBA Future Policy Benefits, Losses, Claims, and Loss Expense (1) Other Policyholders' Funds (2) Benefits $ 9.5 $ 386.4 $ 32.7 $ 7.7 $ 344.7 $ 29.3 Retirement 627.6 23,598.7 54.3 422.0 21,350.2 22.7 Individual Life 385.9 7,551.3 50.2 250.2 7,221.9 47.0 Other — — 12.1 — — 14.9 Segment total 1,023.0 31,536.4 149.3 679.9 28,916.8 113.9 Add: Closed Block — 6,594.3 — 16.3 7,124.5 4.0 Total $ 1,023.0 $ 38,130.7 $ 149.3 $ 696.2 $ 36,041.3 $ 117.9 ____________________ (1) Includes funds held under deposit contracts, future policy benefits, and policy and contract claims on the consolidated balance sheets. (2) Includes unearned premiums.

Reinsurance

Reinsurance	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Reinsurance	13. Reinsurance The Company reinsures portions of its risk in order to limit losses and manage its statutory capital position. Reinsurance agreements are evaluated for risk transfer to determine if they qualify for reinsurance accounting. If they qualify, the Company accounts for reinsurance premiums, commissions, expense reimbursements, benefits and reserves related to reinsured business on bases consistent with those used in accounting for the original policies issued and the terms of the reinsurance contracts. If the agreements do not qualify, they are accounted for on a deposit contract basis. The Company remains liable to its policyholders to the extent that counterparties to reinsurance contracts do not meet their contractual obligations. Accordingly, the future policy benefit reserves and policy and contract claims liabilities are reported gross of any related reinsurance recoverables, which are reported as assets. The Company reports premiums, benefits, and settlement expenses net of reinsurance in the consolidated statements of income (loss). Assets and liabilities and premiums and benefits relating to certain reinsurance agreements that grant surplus relief may be recorded net on the consolidated balance sheets and statements of income (loss) if a right of offset exists within the reinsurance agreement. The following summarizes the Company's reinsurance coverage: • Medical stop-loss. Starting in 2018, the Company reinsures the excess of $2.5 per individual claim; previously, the Company reinsured $2.0 per individual claim. • Group Life & DI. The Company typically reinsures group life mortality risk in excess of $0.25 per individual and line of coverage, and morbidity risk in excess of $8.0 thousand of gross monthly benefit per life. The Company also has catastrophic coverage for group life policies. • Deferred Annuities. In 2017, the Company executed a reinsurance agreement to manage its statutory capital position related to fixed deferred and fixed indexed annuities with a guaranteed return of premium feature and issued beginning in 2017. This agreement does not qualify for GAAP reinsurance accounting. • Income Annuities. In 2018, the Company executed a reinsurance agreement that transfers financial responsibility for its in-force block of income annuity contracts, which primarily consists of structured settlements and a smaller block of SPIAs. This agreement does not qualify for GAAP reinsurance accounting. See further discussion below. • Individual Life. The Company's reinsurance coverage varies by product, policy issue year, and issue age of the insured. For fully underwritten policies issued subsequent to April 2017, the Company retains up to a maximum of $5.0 per life. For fully underwritten policies issued between March 2013 and April 2017, the Company retains up to a maximum of $3.0 per life. In 2018, the Company entered into a reinsurance arrangement to manage its statutory capital position on its survivorship guaranteed universal life policies. This agreement does not qualify for GAAP reinsurance accounting. In addition, the Company has an inter-company reinsurance agreement related to a block of guaranteed universal life policies in order to manage its statutory capital position. The following tables and amounts exclude the deposit asset related to the Reinsurance Transaction, which is described in more detail below. The following table sets forth net life insurance in force: As of As of As of Direct life insurance in force $ 116,515.7 $ 109,179.4 $ 86,142.8 Amounts assumed from other companies 188.4 188.1 187.0 Amounts ceded to other companies (29,612.4 ) (26,473.9 ) (24,452.4 ) Net life insurance in force $ 87,091.7 $ 82,893.6 $ 61,877.4 Percentage of amount assumed to net 0.22 % 0.23 % 0.30 % Percentage of amount ceded to direct 25.41 % 24.25 % 28.39 % The Company evaluates the financial condition of its reinsurers to monitor its exposure to losses from reinsurer insolvencies. The Company analyzes reinsurance recoverables according to the credit ratings and financial health of its reinsurers and is not aware of any of its major reinsurers currently experiencing financial difficulties. As of December 31, 2018 and 2017, $189.9 and $201.3 , respectively, of the reinsurance recoverable was associated with two highly rated reinsurers, each representing approximately 35% of the recoverable balance in both periods. Of the total amount due from reinsurers, 97.6% and 97.5% were with reinsurers rated A- or higher by A.M. Best, as of December 31, 2018 and 2017 , respectively. The Company had no write-offs or reserve for uncollectible reinsurance in 2018 or 2017 . Reinsurance recoverables are composed of the following amounts: As of As of Life insurance Reinsurance recoverables on: Funds held under deposit contracts $ 104.7 $ 102.4 Future policy benefits 135.4 134.3 Paid claims, expense allowance, premium tax recoverables and other 14.2 18.7 Policy and contract claims 6.4 5.8 Total life insurance 260.7 261.2 Accident and health insurance Reinsurance recoverables on: Future policy benefits 37.5 40.3 Paid claims, expense allowance, premium tax recoverables and other 3.7 4.0 Policy and contract claims 6.4 12.7 Total accident and health insurance 47.6 57.0 Total reinsurance recoverables $ 308.3 $ 318.2 The following table sets forth the effect of reinsurance on premiums and policy fees and contract charges. It is disaggregated by accident and health, and life insurance and investment-type products, which are short- and long-duration contracts, respectively. Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Premiums: Direct: Accident and health $ 879.9 $ 798.7 $ 626.3 $ 56.7 Life insurance 205.9 171.1 127.5 10.7 Total direct 1,085.8 969.8 753.8 67.4 Total assumed 1.2 0.9 0.3 — Ceded: Accident and health (1) (27.4 ) (26.4 ) (0.6 ) (4.0 ) Life insurance (46.3 ) (44.8 ) (36.0 ) (2.2 ) Total ceded (73.7 ) (71.2 ) (36.6 ) (6.2 ) Total premiums 1,013.3 899.5 717.5 61.2 Policy fees and contract charges: Direct life insurance and investment-type 318.4 278.0 220.8 18.0 Ceded life insurance and investment-type (15.0 ) (12.4 ) (8.1 ) (0.4 ) Total policy fees and contract charges (2) 303.4 265.6 212.7 17.6 Total premiums and other amounts assessed to policyholders $ 1,316.7 $ 1,165.1 $ 930.2 $ 78.8 Percentage of assumed to total premiums and other amounts assessed to policyholders 0.09 % 0.08 % 0.03 % — % _______________ (1) Successor Company ceded premiums reflect long-term disability income business recaptured during 2016. (2) Total policy fees and contract charges represents amounts charged to policyholders other than premiums and recorded in policy fees, contract charges and other in the consolidated statements of income (loss). This primarily consists of cost of insurance charges. Reinsurance benefits reduced policyholder benefits and claims by $66.2 , $98.1 , $27.3 and $3.6 respectively, for the years ended December 31, 2018 and 2017, and the periods February 1 to December 31, 2016 and January 1 to January 31, 2016 . Reinsurance Transaction In September 2018, the Company entered into the Reinsurance Transaction , which was effective as of July 1, 2018 ( Agreement Date ) and accounted for under the deposit accounting method. The deposit asset and funds withheld liability established by the Reinsurance Transaction do not have the right to offset, therefore are shown gross on the Company's consolidated balance sheets. The Company established a $6.1 billion deposit asset which is included in reinsurance recoverables on its consolidated balance sheet for an amount equal to the Closed Block's $5.7 billion net statutory reserves due from the reinsurer and an amount paid to the reinsurer at the Transaction date. The equivalent GAAP reserves for the reinsured policies was $6.8 billion . The fair value adjustment to income annuity reserves recorded under PGAAP at the time of the Merger is the primary driver of the difference between the GAAP and statutory reserves. The difference between the deposit asset and the GAAP reserves is adjusted over the remaining life of the reinsured policies using the effective interest method and recognized in interest credited in the consolidated statements of income (loss). Assets supporting the net statutory reserves of the Closed Block were withheld and are legally owned by the Company. These are reported as a funds withheld liability on the consolidated balance sheets. Adjustments to the funds withheld liability are based upon the investment and benefit amounts passed to the reinsurer during the period, which are recorded as ceded amounts in the consolidated statements of income (loss). The funds withheld liability is composed of the host contract and an embedded derivative. The embedded derivative represents the right to receive or obligation to pay the total return on the withheld assets, which must be bifurcated from the host contract and carried at fair value on the Company’s consolidated balance sheets. The fair value of the embedded derivative fluctuates with changes in the unrealized gain (loss) on the withheld assets. Initially, the fair value of the embedded derivative is zero. Changes to the fair value of the embedded derivative are recognized in net realized gains (losses) on the Company’s consolidated statements of income (loss). In the event of the reinsurer's insolvency, the Company would reclaim the assets supporting the reserve liabilities. The Company has the ability to offset amounts due to the reinsurer with amounts owed from the reinsurer, as well as access to amounts held in trust, which reduces the risk of loss. The Company remains liable to its policyholders to the extent that the reinsurer does not meet its contractual obligations. The following table provides a reconciliation of the beginning and ending balance for the deposit asset and funds withheld liability: For the Year Ended December 31, 2018 Deposit asset at inception $ 6,072.6 Incurred interest adjustment (152.2 ) Deposit asset at end of period $ 5,920.4 Funds withheld liability at inception $ 5,700.0 Ceded investment amounts 303.4 Ceded benefit amounts (313.0 ) Quarterly settlement due to reinsurer (33.5 ) Changes in fair value of embedded derivative (67.0 ) Funds withheld liability at end of period $ 5,589.9

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Symetra Life files a consolidated federal income tax return with its wholly-owned subsidiaries. Income taxes have been determined using the liability method. The provision for income taxes has three components: amounts currently payable or receivable, unrecognized tax benefits, and deferred income taxes. The deferred income taxes are calculated as the difference between the book and tax bases of the appropriate assets and liabilities and are measured using enacted tax rates. The Company files income tax returns in the U.S. federal and various state jurisdictions. The Company's federal and state income tax returns are open for examination for tax years 2013 through the present. The Company receives investment tax credits from its investments in certain limited partnerships. These are accounted for using the flow-through method. Refer to Note 4 for further discussion of our tax credit investments. Differences between income taxes computed by applying the U.S. federal income tax rate of 21% (35% in 2017 and prior) to income (loss) from operations before income taxes and the provision (benefit) for income taxes were as follows: Successor Company Predecessor Company For the Year Ended For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Income (loss) from operations before income taxes $ (122.5 ) $ 114.7 $ (51.7 ) $ (12.8 ) Tax provision (benefit) at U.S. Federal statutory rate (25.7 ) 21.0 % 40.2 35.0 % (18.1 ) 35.0 % (4.5 ) 35.0 % Increase (reduction) in rate resulting from: Impact of change in enacted tax rates on deferred tax balances (7.7 ) 6.3 (151.0 ) (131.6 ) — — — — Investment tax credits (40.6 ) 33.1 (37.0 ) (32.3 ) (52.0 ) 100.8 (4.1 ) 32.0 Dividends received deduction (1.7 ) 1.4 (4.0 ) (3.5 ) (1.0 ) 1.9 (0.1 ) 0.8 Other (0.6 ) 0.5 6.4 5.6 0.6 (1.3 ) (0.2 ) 1.6 Provision (benefit) for income taxes $ (76.3 ) 62.3 % $ (145.4 ) (126.8 )% $ (70.5 ) 136.4 % $ (8.9 ) 69.4 % As of December 22, 2017, the Company remeasured the deferred tax assets and liabilities to reflect a change in the federal statutory rate from 35% to 21%. As a result, income tax expense for 2017 includes a net decrease of $151.0 related to the remeasurement of deferred tax balances. As of December 31, 2018, the Company has completed its accounting for the effects of the 2017 Tax Act and there were no material adjustments made during the measurement period. The following table sets forth the tax effects of temporary differences that gave rise to the deferred income tax assets and liabilities. Deferred income tax assets and liabilities were measured at a corporate tax rate of 21% as of December 31, 2018 and 2017 . As of As of Deferred income tax assets: Adjustments to life policy liabilities $ 340.0 $ 452.6 Unrealized losses on investment securities (net of DAC and VOBA adjustment: $22.9 for 2018) 85.3 — Net operating losses 26.8 — Investment tax credit carryforward 63.1 — Other 12.4 13.3 Total deferred income tax assets 527.6 465.9 Deferred income tax liabilities: Deferred policy acquisition costs 52.7 24.4 Basis adjustment on securities 115.0 210.4 Unrealized gains on investment securities (net of DAC and VOBA adjustment: $16.9 for 2017) — 146.5 Intangible assets and VOBA 322.7 325.7 Other 7.4 10.0 Total deferred income tax liabilities 497.8 717.0 Deferred income tax asset (liability), net $ 29.8 $ (251.1 ) As of December 31, 2018 , the Company has a gross federal net operating loss (NOL) carryforward of $127.4 , which does not expire under current law, and investment tax credit carryforwards of $63.1 , which expire during 2037 through 2039. Deferred tax assets are recognized only to the extent that it is more likely than not that future taxable profits will be available, and a valuation allowance is established where deferred tax assets cannot be recognized. Based on an analysis of the Company’s tax position, management believes that it is more likely than not that the Company will generate sufficient taxable income to utilize all of its deferred tax assets. Accordingly, no valuation allowance for deferred tax assets has been established as of December 31, 2018 and 2017 . The Company includes penalties and interest related to unrecognized tax benefits in the calculation of income tax expense in the accompanying consolidated statements of income (loss).

Dividends

Dividends	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Dividends	15. Dividends Symetra Life is restricted by state regulations as to the aggregate amount of dividends it may pay to the Parent in any consecutive 12-month period without regulatory approval. The aggregate amount of dividends for the current year is determined based on the prior year’s statutory results. Under state law, Symetra Life may pay dividends only from the earned surplus arising from its business and must receive prior approval of the Insurance Commissioner of the State of Iowa ("the Commissioner") if such distributions would exceed certain statutory limitations. Iowa law gives the Commissioner discretion to disapprove requests for distributions in excess of these limits. For the year ended December 31, 2018 , dividends to the Parent from Symetra Life were limited to $221.9 without Commissioner approval, and total dividends declared were $50.0 . For the year ended December 31, 2019, dividends are restricted to $212.7 without prior Commissioner approval.

Statutory-Basis Information

Statutory-Basis Information	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Statutory-Basis Information	16. Statutory-Basis Information Symetra Life and its subsidiaries are required to prepare statutory financial statements in accordance with statutory accounting practices prescribed or permitted by the insurance department of the state of domicile. Statutory accounting practices differ from GAAP primarily by charging policy acquisition costs to expense as incurred and establishing future policy benefit liabilities using different actuarial assumptions, as well as using a different basis in accounting for investments, certain assets, certain financial reinsurance transactions, and deferred taxes. Additionally, the statutory financial statements were not affected by purchase accounting. Effective January 1, 2017, Symetra Life elected Iowa Bulletin 06-01, which allows companies to record the change in fair value of derivative instruments used to economically hedge indexed products in income, consistent with how the change in indexed product reserves is recorded. There was no net impact on surplus. The statutory net income (loss) and statutory capital and surplus for Symetra Life and its subsidiaries are as follows: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 For the Year Ended December 31, 2016 Statutory net income (loss): Symetra Life $ (118.7 ) $ 267.8 $ 43.4 Subsidiaries 0.5 11.1 7.3 Statutory capital and surplus: Symetra Life (1) $ 2,126.6 $ 2,218.9 $ 2,082.4 Subsidiaries 158.0 135.9 134.0 _______________ (1) Symetra Life’s surplus includes the balances of its three wholly-owned subsidiaries, First Symetra National Life Insurance Company of New York, Symetra National Life Insurance Company and Symetra Reinsurance Corporation. For the year ended December 31, 2018, Symetra Life's statutory net loss included negative ceding commission in connection with the Reinsurance Transaction and unrealized losses related to decreases in the fair value of derivatives recorded in income. Each state of domicile imposes minimum risk-based capital (RBC) requirements that were developed by the NAIC. The formulas for determining the amount of RBC specify various weighting factors that are applied to the financial balances or various levels of activity based on the perceived degree of risk. Regulatory compliance is determined by a ratio of total adjusted capital, as defined by the NAIC, to company action level RBC, as defined by the NAIC. Companies below specific trigger points or ratios are classified within certain levels, each of which requires specified corrective action. Symetra Life and its subsidiaries have statutory surplus and RBC levels that are well above current regulatory required levels.

Related Parties

Related Parties	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Parties	The Company has entered into various agreements with the Parent and its affiliates for services necessary to conduct its activities. These agreements specify that the parties will provide to and receive from each other certain general services related to sharing common management, personnel and facilities, and that the related expenses will be shared. These expenses include rent, payroll, benefits, data processing systems, and other charges. General service expenses are allocated among legal entities using various methodologies to estimate service utilization, including headcount, time studies or relevant activity levels, which management believes to be reasonable. In addition, the Company paid concessions, general agent fees, administrative and underwriting fees for services provided by its affiliates. These affiliates primarily included Symetra Securities, Inc. and Medical Risk Managers, Inc. The Company’s affiliate, Symetra Assigned Benefits Service Company (SABSCO), purchased future payment streams of structured settlement annuity contracts issued by the Company from third-party payees. These contracts were assigned to and owned by SABSCO. The Company issued commutation endorsements to pay SABSCO lump sum amounts in lieu of receiving the future payment streams in the structured settlement annuity contracts and releases its reserves related to the contracts. The Company records intercompany receivables in receivables and other assets and intercompany payables in other liabilities on the consolidated balance sheets. It is the Company’s policy to settle amounts due with affiliated companies within 30 days, except for certain long-term compensation liabilities that are settled when the awards are paid. Payables and receivables are aggregated and reported net for each affiliated entity. Balances and transactions with related parties recorded in the Company’s consolidated financial statements were as follows: As of As of Balances with Parent and affiliates: Receivables $ 0.1 $ 0.1 Payables 22.9 17.1 Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Transactions with Parent and affiliates: Payments related to commutation endorsements (1) $ 5.6 $ 7.8 $ 7.4 $ 0.6 Shared services expenses allocated, net (2) 8.4 6.9 6.1 0.4 Concessions, general agent fees, administrative and underwriting fees (3) 10.2 10.7 8.0 0.9 ___________________ (1) Commutation endorsements reduce the reserves reported in funds held under deposit contracts on the consolidated balance sheets and interest credited on the consolidated statements of income (loss), net of related payments. (2) Reported primarily in other underwriting and operating expenses on the consolidated statements of income (loss). (3) Reported in policy fees, contract charges, and other on the consolidated statements of income (loss). During the year ended December 31, 2017, the Company purchased investments with a fair value of $72.2 from its Parent.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (GAAP). All significant intercompany transactions and balances between Symetra Life and its subsidiaries have been eliminated. Certain reclassifications have been made to prior year financial information to conform to the current period presentation. The Company adjusted its segment information to reflect its new reportable segments following the execution of the Reinsurance Transaction in the third quarter of 2018. Refer to Note 13 for further discussion.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that may affect the amounts reported in the consolidated financial statements and accompanying notes. The most significant estimates include those used to determine the following: valuation of investments carried at fair value; the balance, recoverability and amortization of deferred policy acquisition costs (DAC) and value of business acquired (VOBA); the liabilities for funds held under deposit contracts, future policy benefits, and policy and contract claims; recoverability of goodwill and intangible assets; valuation of the deposit asset, funds withheld liability and embedded derivative related to the Reinsurance Transaction; and valuation of deferred tax assets. The recorded amounts reflect management’s best estimates, though actual results could differ from those estimates.
Recognition of Insurance Revenue and Related Benefits	Recognition of Insurance Revenue and Related Benefits The Company’s group insurance policies, which include medical stop-loss, and group life and DI, are short-duration contracts. Group life and DI business includes group life insurance and short- and long-term disability products. Premiums from these products are recognized as revenue when earned over the life of the policy. Policyholder claims are charged to operations as incurred. Traditional individual life insurance products, including term life insurance products, are long-duration contracts, and the associated premiums and benefits are fixed. Premiums from these products are considered earned and recognized as revenue when due. Reserves are associated with earned premiums such that profits are recognized over the life of the contracts. Deposits related to universal life (UL) insurance products and investment-type products are credited to policyholder account balances and reflected as liabilities, rather than as premium income, when received. Investment-type products include fixed deferred annuities, SPIA, and structured settlements. Revenues from UL insurance and investment-type products consist of net investment income on the policyholders’ fund balances, and amounts assessed for cost of insurance, policy administration, and surrender charges. These assessments are recorded in policy fees, contract charges, and other in the consolidated statements of income (loss). Expenses charged to operations for these products include interest credited and claims in excess of related policyholder account balances. These amounts are expensed as incurred. Revenue from variable annuities, life and COLI products include mortality and expense, policy administration and surrender charges. These fees are charged to policyholders’ accounts based upon the daily net assets of the policyholders’ account values and are recognized as revenue in policy fees, contract charges, and other in the consolidated statements of income (loss) when assessed.
Separate Account Assets and Liabilities	Separate Account Assets and Liabilities Separate account balances relate to the Company's variable products. Separate account assets are reported at fair value and represent funds that are invested on behalf of the Company’s variable product policyholders. The assets of each separate account are legally segregated and are not subject to claims that arise out of the Company’s other business activities. Investment risks associated with market value changes are borne by the policyholder, except to the extent of death benefits guaranteed by the Company with respect to certain accounts. Net investment income and realized gains and losses accrue directly to the policyholders and are not included in the Company’s revenues. Separate account liabilities represent the policyholders' account balances in the separate account. For variable annuity contracts with guaranteed minimum death benefits (GMDB), the Company contractually guarantees death benefits that may exceed the policyholder's account balance. The Company reinsures most of the GMDB risk on its variable annuity contracts.
Funds Held Under Deposit Contracts	Funds Held Under Deposit Contracts Funds held under deposit contracts includes liabilities for fixed deferred annuity contracts, fixed indexed annuities (FIA), SPIA, structured settlement annuities, and UL policies, including BOLI. For the Successor Company, these liabilities also include PGAAP-related adjustments discussed below. Liabilities for fixed deferred annuity contracts, and the fixed account portion of FIA and universal life policies are equal to account value, plus additional liabilities for policy benefits accrued but not yet earned, credited, or redeemed. Account value represents the amount available in cash to the policyholder, without regard to any surrender fees. This is computed as deposits net of withdrawals made by the policyholder, plus amounts credited based on contract specifications, less contract fees and charges assessed, plus any additional interest. Policy benefits accrued but not yet earned, credited, or redeemed relate to bonus interest, excess death benefits, and other policy benefits that can be attributed to a specific policy or group of policies. The liability for the indexed account portions of FIA and Indexed UL represent the present value of future estimated guaranteed benefits, as well as embedded derivatives related to expected index credits on these contracts and policies. The embedded derivatives are recorded at fair value. See Note 6 for further discussion. For SPIA and structured settlements, liabilities are based on discounted amounts of estimated future benefits. Future benefits are either fully guaranteed or are contingent on the survivorship of the contract holder. For policies issued subsequent to the Merger, contingent future benefits are discounted with pricing mortality assumptions, which include provisions for longer life spans over time. The interest rate pattern used to calculate the reserves for these policies is set at issue, and interest rates for the pattern vary over time. For the Successor Company, assumptions were reset for policies in force as of the date of the Merger, as discussed below. Impact of Purchase Accounting In conjunction with the Merger, liabilities for in-force business were recorded at fair value and the underlying contracts were considered to be new contracts for measurement and reporting purposes as of the Merger Date. Estimating the fair value of these liabilities required the use of current assumptions for future investment yields, mortality, persistency, and other factors based on the Company’s historical experience, modified as necessary to reflect anticipated trends. The Company’s assumptions and estimates required significant judgment and, therefore, are inherently uncertain. The Company cannot determine with precision the ultimate amounts that it will pay to its contract holders or the timing of those payments. At the Merger Date, the Company updated the assumptions described above to reflect current best estimates. Either a VOBA asset or an additional insurance liability was recorded to reflect the difference between the fair value of the liability and the amounts previously established. An additional insurance liability was established for the Company's lines of business related to structured settlements, SPIA, and certain BOLI policies. The liability is reported in funds held under deposit contracts and amortized over the policy period in proportion to the approximate consumption of losses. Amortization is recorded as a reduction of interest credited. Funding Agreements with Federal Home Loan Bank of Des Moines In August 2018, the Company became a member of the Federal Home Loan Bank of Des Moines (FHLB DM). Membership allows access to the FHLB DM's funding services, which provide an alternative liquidity source, including the ability to obtain loans and issue funding agreements that are collateralized by qualifying assets. Eligible collateral includes eligible CMBS, RMBS, government or agency securities and mortgage loans. The Company has issued funding agreements to the FHLB DM to support an institutional spread program, where the Company earns income primarily from the difference between investment income earned and interest paid on the funding agreements. These amounts are recorded in net investment income and interest credited, respectively, on the consolidated statements of income (loss). As of December 31, 2018, the Company had outstanding funding agreements of $105.7 and had pledged collateral with a fair value of $221.2 .
Future Policy Benefits	Future Policy Benefits The Company estimates liabilities for future policy benefits for its traditional individual life policies as the present value of expected future policy benefits less future net premiums. The Company selects the net premiums so that the actuarial present value of future benefits equals the actuarial present value of future premiums. The Company sets the interest, mortality, and persistency assumptions in the year of issue and includes a provision for adverse deviation. The provision for adverse deviation is intended to provide coverage for the risk that actual experience may be worse than locked-in best-estimate assumptions. The Company derives mortality assumptions from both company-specific and industry statistics. Future benefits are discounted at interest rates that vary by year of policy issue. These rates are initially set to be consistent with investment rates at the time of issue, and are graded to a lower rate over time. Assumptions are set at the time each product is introduced and are not updated for actual experience unless the total product liability amount is determined to be inadequate to cover future policy benefits. The Company estimates liabilities for future policy benefits for group long-term disability policies as the present value of future benefit payments, net of terminations and reinsurance recoverables, and discounted at interest rates based on investment rates at the time of disability. Liabilities for policies in-force as of the Merger Date were set to fair value, using assumptions that reflected current best estimates as of the Merger Date.
Investments in Limited Partnerships	Investments in Limited Partnerships The Company invests in limited partnerships where the primary return on investment is in the form of income tax credits and the tax benefit on the pass-through of partnership activity. These partnerships (collectively referred to as "tax credit investments") are established to invest in low-income housing and other qualifying purposes. Refer to Note 4 for further discussion. Investments in limited partnerships also include alternative investments (private equity and hedge funds) recorded at fair value. Changes in the fair value of these investments are recorded in realized gains (losses). The Company elected the fair value option for these investments, regardless of ownership percentage, to standardize the related accounting and reporting.
Policy Loans	Policy Loans Policy loans are carried at unpaid principal balances. Policy loans are not granted for amounts in excess of the accumulated cash surrender value of the policy or contract.
Variable Interest Entities	Variable Interest Entities The Company performs an ongoing qualitative assessment of its involvement with variable interest entities (VIEs). A VIE is an entity that does not have sufficient equity to finance its own activities without additional financial support, or where investors lack certain characteristics of a controlling financial interest. The Company assesses its contractual, ownership or other interests in a VIE to determine whether it has a variable interest in the entity, and if so, to determine whether the Company has a controlling financial interest and would therefore be considered the primary beneficiary of the VIE. If it is determined the Company is the primary beneficiary of a VIE, the Company includes the assets and liabilities of the VIE in the consolidated financial statements. The limited partnerships that the Company invests in meet the definition of a VIE. Because the Company, as a limited partner, lacks the ability to direct the activities of any of these partnerships, it is not considered the primary beneficiary and therefore has not consolidated them. The maximum exposure to loss in these VIEs was $131.2 and $176.3 as of December 31, 2018 and 2017, respectively. The maximum exposure to loss includes commitments to provide future capital contributions. In the normal course of business, the Company also makes passive investments in structured securities issued by VIEs. These structured securities primarily include residential and commercial mortgage-backed securities and collateralized loan obligations. Because the Company lacks the ability to direct the activities that most significantly impact the economic performance of the VIEs, it is not considered the primary beneficiary and therefore does not consolidate them.
Accounting Pronouncements and Other Significant Policies	Other Significant Accounting Policies The following table includes significant accounting policies that are described in other notes to the financial statements, including the number of the note. Significant Accounting Policy Note # Other Intangible Assets 3 Goodwill 3 Investments 4 Mortgage Loans 5 Derivative Financial Instruments 6 Fair Value of Financial Instruments 7 Deferred Policy Acquisition Costs (DAC) 8 Value of Business Acquired (VOBA) 8 Liability for Unpaid Claims 9 Commitments and Contingencies 11 Segment Information 12 Reinsurance 13 Income Taxes 14 Accounting Pronouncements Newly Adopted ASU No. 2016-01, Financial Instruments (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities. This accounting standards update (ASU) amends recognition and disclosure requirements primarily for equity investments carried at fair value. Under the standard, changes in fair value are recorded in income. The update is effective beginning January 1, 2018, with early adoption permissible. The Company adopted the standard on January 1, 2018 using a modified retrospective approach. The Company previously held equity investments classified as available-for-sale securities that were impacted by the standard. Upon adoption, $114.3 of net unrealized gains, net of taxes of $30.4 , related to these securities were reclassified from accumulated other comprehensive income (loss) (AOCI) to retained earnings. Subsequent to adoption, changes in fair value of these securities are recorded through net realized gains (losses) in the consolidated statements of income (loss). As a result, the Company expects increased volatility in net income and removed disclosures no longer required. ASU No. 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This standard amends the guidance for amortization of premiums on purchased callable debt securities. Under the standard, premiums on these securities will be amortized to the earliest call date, rather than final maturity of the security. The guidance applies only to bonds for which the call date and price is fixed. Further, the amortization period for debt securities carried at a discount will not be impacted. The update is effective beginning January 1, 2019, with early adoption permissible. The Company early adopted the standard on October 1, 2018 using a modified retrospective approach. The change in amortization method upon adoption did not have a significant impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Adopted ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This standard amends the recognition and measurement of hedging instruments to better represent an entity's risk management activities. Under the standard, the requirement to separately measure and report hedge ineffectiveness is eliminated. In addition, the standard provides relief from certain initial documentation requirements and replaces the requirement for quarterly quantitative ineffectiveness testing with a qualitative approach. The update is effective beginning January 1, 2019, with early adoption permissible. The Company adopted the standard on January 1, 2019 using a modified retrospective approach. Upon adoption, the Company updated its internal processes and controls to ensure compliance with the revised standard. The adoption did not have a significant impact on the Company's consolidated financial statements. ASU No. 2016-02, No. 2018-10, No. 2018-11, Leases (Topic 842). These standards amend the recognition requirements for all leases with a term greater than 12 months and provide new guidelines for the identification of a lease within a contract. Under these standards, companies must measure and recognize a liability to make lease payments and a right-of-use asset representing the right to use the underlying asset for the lease term. In addition, the standards require expanded quantitative and qualitative disclosures. The standards also provide a simplified transition method, which allows entities to recognize the cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, rather than in the earliest period presented. These updates are effective beginning January 1, 2019, with early adoption permissible. The Company adopted the standard on January 1, 2019 using a modified retrospective approach and applied the requirements to all existing leases using the simplified transition option. Upon adoption, the Company established a right-of-use asset of $6.6 and corresponding lease liability on its consolidated balance sheets and did not have any income statement impact. ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). This standard amends the credit loss measurement guidance for certain financial assets to reflect current expected credit losses (CECL). Under the CECL model, an entity will estimate lifetime expected credit losses considering available relevant information about historical events, current conditions and reasonable and supportable forecasts. Additionally, the guidance expands the required credit loss disclosures. Finally, the standard amends the impairment model for available-for-sale fixed maturities, and any credit losses will be recognized through an allowance, rather than through an adjustment to the amortized cost basis. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is evaluating the impact of the standard on its financial statements, with a focus on fixed maturity securities, mortgage loans, and reinsurance recoverables. Upon adoption, the Company will apply the standard using a modified retrospective approach. The Company plans to adopt on January 1, 2020. ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350) . This standard removes the requirement to calculate the implied fair value of goodwill (Step 2 of the goodwill impairment test) to measure a goodwill impairment charge. A goodwill impairment charge will now be measured as the amount by which a reporting unit's carrying value exceeds its fair value determined in Step 1 of the goodwill impairment test. This impairment test will be applied to goodwill assigned to all reporting units, even those with zero or negative carrying amounts. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is monitoring the potential impact of the standard on its annual goodwill impairment assessment. Upon adoption, the Company will apply the standard prospectively. The Company plans to adopt on January 1, 2020. ASU No. 2018-12, Financial Services – Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts . This standard substantially changes the accounting treatment of long-duration contracts. Entities will now be required to regularly review and update assumptions used to measure the liability for future policy benefits, which were previously locked at contract inception and held constant over the contract term. Assumptions used to measure discounted cash flows will be reviewed at least annually, and the discount rate assumption will be updated at each reporting date based on a standardized, market-observable discount rate. Entities will also be required to use a fair value model to measure their market risk benefits, with the insurance accrual model no longer an option. The standard also simplifies the DAC amortization method for all long-duration contracts by replacing the previous earnings-based methods with a constant level approach. The update will also require additional financial statement disclosures, including a rollforward of the liability and information about significant assumptions used. The update is effective beginning January 1, 2021, with early adoption permissible. The Company is in the early stages of assessing the impact of the standard on its annuity and life insurance contracts, and assessing which transition approach to apply upon adoption. The Company plans to adopt on January 1, 2021. ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework. This standard amends the disclosure requirements for fair value measurements. Under the standard, there are new disclosure requirements for Level 3 fair value measurements as well as the elimination of certain current disclosure requirements. The update is effective beginning January 1, 2020, with early adoption permissible. The Company is assessing the impact on its annual disclosures. The Company plans to adopt on January 1, 2020.
Intangible Assets	Intangible assets with finite lives are amortized on a straight-line basis over the estimated useful life of the assets. Amortizable intangible assets consist of value of distribution acquired (VODA), value of customer relationships acquired (VOCRA), trade names and technology. VODA represents the present value of expected future profits associated with the expected future business derived from distribution relationships in existence as of the Merger Date. VOCRA represents the present value of the expected future profits associated with the Company's group insurance business in-force in the Benefits segment as of the Merger Date, including the value of renewals associated with this business. Identified intangible assets were valued using the excess earnings method, relief from royalty method or cost approach, as appropriate. Other intangible assets with finite lives are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets might not be recoverable. Conditions that would necessitate an impairment assessment include a significant change in the extent or manner in which an asset is used or any other significant adverse change that would indicate that the carrying amount of an asset or group of assets may not be recoverable. Impairment is only recorded if the asset’s carrying amount is not recoverable through its undiscounted future cash flows. If an impairment exists, the amount is measured as the difference between the carrying amount and fair value.
Goodwill	The Company has elected not to amortize goodwill, and reviews for impairment at least annually, as of July 1, or more frequently if there are indicators of impairment, with consideration given to financial performance and estimates of the future profitability of the associated lines of business. The goodwill impairment process requires a comparison of the estimated fair value of a reporting unit to its carrying value. The Company tests goodwill for impairment by either performing a qualitative assessment or a quantitative test. The qualitative assessment is an assessment of historical information and relevant events and circumstances to determine whether it is more likely than not that an impairment exists. If the Company concludes that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill, the Company moves on to a quantitative impairment test. The Company may also elect not to perform the qualitative assessment for some or all of its reporting units and perform a quantitative impairment test instead. In performing the quantitative impairment test, the Company may determine the fair values of its reporting units by applying a discounted cash flow and/or market valuation approach. The discounted cash flow valuation approach requires significant judgments and assumptions about the level of economic capital required to support the mix of business, long-term growth rates, the account value of in-force business, projections of new and renewal business, as well as margins on such business, the level of interest rates, credit spreads, equity market levels, and the discount rate that the Company believes is appropriate for the respective reporting unit. If the fair value is lower than the carrying amount, the Company determines the implied fair value of goodwill and records an impairment equal to the excess of the existing goodwill balance over the implied fair value. Goodwill Goodwill represents the acquisition price in excess of the fair value of net assets acquired in the Merger, including identifiable intangible assets, and reflects the Company’s future growth potential, assembled workforce and other sources of value not associated with identifiable assets. The Company's goodwill balance was assigned to its reporting units, which are the same as the Company's segments (Benefits, Retirement and Individual Life).
Available-for-sale Securities	Available-for-Sale Securities The Company classifies the majority of its investments in fixed maturities as available-for-sale and carries them at fair value. Fixed maturities primarily include bonds, mortgage-backed securities, collateralized loan obligations and redeemable preferred stock. See Note 7 for information on the valuation of these securities and additional disclosures regarding fair value measurements. The Company reports net unrealized gains (losses) related to its available-for-sale securities in AOCI in stockholder’s equity, net of related DAC and VOBA adjustments and deferred income taxes. The cost of securities sold is determined using the specific-identification method. The Company reports interest and dividends earned, including prepayment fees or interest-related make whole payments, in net investment income. Prepayments of fixed maturities and commercial mortgage loans result in accelerated amortization or accretion of the premium or discount associated with the investment, which is recorded in realized gains (losses). Interest income for fixed maturities is recognized using the effective yield method. For mortgage-backed securities, the Company recognizes income using a constant effective yield based on anticipated prepayments and the estimated economic life of the securities. Quarterly, the Company compares actual prepayments to anticipated prepayments and recalculates the effective yield to reflect actual payments plus anticipated future payments. The Company includes any resulting adjustment in net investment income in the current period. When the collectibility of interest income for fixed maturities is considered doubtful, any accrued but uncollectible interest is deducted from investment income in the current period. The Company then places the securities on nonaccrual status, and they are not restored to accrual status until all delinquent interest and principal are paid.
Mortgage Loans	For loans issued subsequent to the Merger, the carrying value of mortgage loans reflects outstanding principal balances, adjusted for unamortized deferred fees and costs, net of an allowance for loan losses. Loan origination fees and costs are deferred and amortized over the life of the loan. Interest income, including amortization of deferred fees and expenses, is recorded in net investment income using the effective interest rate method.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for losses on mortgage loans provides for the risk of credit loss inherent in the lending process. The allowance consists of a portfolio reserve for probable losses incurred but not specifically identified and, as needed, specific reserves for impaired loans. The allowance for losses on mortgage loans is evaluated at each reporting period and adjustments are recorded when appropriate. Loans are specifically evaluated for impairment if the Company considers it probable that amounts due according to the terms of the loan agreement will not be collected, or the loan is modified in a troubled debt restructuring. The Company establishes specific reserves for these loans when the fair value is less than the carrying value.
Derivative Financial Instruments	The Company uses derivative financial instruments to hedge certain portions of its exposure to equity market risk, interest rate risk and foreign currency exchange risk. Derivative financial instruments currently held consist primarily of equity market contracts, interest rate swaps, and foreign currency swaps. Derivative instruments may be exchange-traded or contracted in the over-the-counter (OTC) market. The Company has established policies for managing its derivatives, including prohibitions on derivatives market-making and other speculative derivatives activities. All of the Company’s derivative financial instruments are individually recognized at fair value as either assets within derivatives, or liabilities within other liabilities in the consolidated balance sheets. The accounting for derivatives depends on whether it qualifies and has been designated for hedge accounting. To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated risk of the hedged item. Effectiveness of the hedge is formally assessed at inception and throughout the life of the hedging relationship. In connection with purchase accounting, the Company formally redesignated its hedge accounting relationships as of the Merger Date. When a derivative is designated as a cash flow hedge and is determined to be highly effective, changes in its fair value are recorded as a component of other comprehensive income and reclassified into net income in the same period during which the hedged transaction affects net income. Any hedge ineffectiveness is recorded in the consolidated statements of income (loss) within net realized gains (losses). If a derivative instrument does not qualify, or is not designated for hedge accounting, the changes in its fair value are recorded in the consolidated statements of income (loss) within net realized gains (losses). The Company prospectively discontinues hedge accounting when: (1) the criteria to qualify for hedge accounting is no longer met (e.g., the derivative is no longer highly effective in offsetting the change in cash flows of a hedged item); (2) the derivative expires, is sold, terminated or exercised; or (3) the derivative is de-designated as a hedging instrument for hedge accounting purposes. If it is determined that a derivative no longer qualifies as an effective hedge, the derivative continues to be carried in the consolidated balance sheets at its fair value, with changes in fair value recognized prospectively in the consolidated statements of income (loss) within net realized gains (losses). The Company also issues fixed indexed annuity contracts and indexed universal life policies that contain embedded derivatives, which are recorded at fair value in funds held under deposit contracts in the consolidated balance sheets. The Reinsurance Transaction also contains an embedded derivative related to the withheld assets supporting the Closed Block annuity contracts. Refer to Note 13 for more information about the Closed Block embedded derivative. Changes in fair value of embedded derivatives are recognized in net realized gains (losses).
Fair Value of Financial Instruments	The Company determines the fair value of its financial instruments based on the fair value hierarchy, which favors the use of observable inputs over the use of unobservable inputs. The Company has categorized its financial instruments into the three-level hierarchy, which gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The level assigned to a fair value measurement is based on the lowest-level input that is significant to the measurement. The fair value measurements for the Company's financial instruments are categorized as follows: • Level 1 — Unadjusted quoted prices in active markets for identical instruments. • Level 2 — Quoted prices for similar instruments in active markets and model-derived valuations whose inputs are observable. This category includes financial instruments that are valued using industry-standard pricing methodologies or models. All significant inputs are observable or derived from observable information in the marketplace. • Level 3 — Fair value estimates whose significant inputs are unobservable. This includes financial instruments for which fair value is estimated based on industry-standard pricing methodologies and internally developed models utilizing significant inputs not based on or corroborated by readily available market information. In limited circumstances, this may also utilize estimates based on non-binding broker quotes.
Deferred Policy Acquisition Costs and Value of Business Acquired	The Company defers costs that are directly related to the successful acquisition or renewal of insurance contracts. These primarily include commissions, distribution costs directly related to sales, third-party underwriting costs and the portion of salaries and benefits directly related to processing successful new and renewal contracts. All other acquisition-related costs, including costs incurred for soliciting potential customers, managing the distribution and underwriting functions, training, administration, unsuccessful acquisition or renewal efforts, market research and product development are not deferrable and are expensed in the period incurred. In addition, on the date of the Merger, the Company's DAC balance was reset to zero, and a balance for VOBA was established, representing the right to receive future gross profits from cash flows and earnings of the Company's existing business. VOBA was based on the actuarially estimated present value of future cash flows from the Company's insurance policies and annuity contracts in-force on the date of the Merger. The estimated present value of future cash flows used in the calculation of VOBA was based on certain assumptions, including lapse rates, mortality experience, maintenance expenses, crediting rates, and investment performance that the Company expects to experience in future years. The Company amortizes DAC and VOBA for deferred annuity contracts and universal life insurance policies over the lives of the contracts or policies in proportion to the estimated future gross profits. To estimate future gross profits, the Company makes assumptions as to lapse rates, mortality experience, maintenance expenses, crediting rates, and investment performance. Actual profits can vary from the estimates and can thereby result in increases or decreases to DAC and VOBA amortization. The Company regularly evaluates its assumptions and, when necessary, revises the estimated gross profits of these contracts, resulting in assumption and experience unlocking adjustments to DAC and VOBA amortization. When such estimates are revised, the impact is recorded in the consolidated statements of income (loss). The Company amortizes acquisition costs for traditional individual life insurance policies over the premium paying period of the related policies, using assumptions consistent with those used in computing policy reserves. The Company amortizes acquisition costs for immediate annuities using a constant yield approach. The Company adjusts the unamortized DAC and VOBA balances for the effect of net unrealized gains and losses on securities as if they had been realized as of the balance sheet date. The Company includes the impact of this adjustment, net of tax, in AOCI. The Company also adjusts its unamortized DAC and VOBA balances for the effect of realized gains and losses including changes in fair value of the embedded derivatives for the Company's FIA policies. These adjustments are recognized in net realized gains (losses) in the consolidated statements of income (loss). For some products, policyholders can elect to modify product benefits, features, rights or coverage by exchanging a contract for a new contract; by amendment, endorsement or rider to a contract; or by election of a feature or coverage within a contract. These transactions are known as internal replacements. If the modification substantially changes the original contract, the remaining DAC balance is immediately written off through earnings and any eligible costs associated with the replacement contract are deferred. If the modification does not substantially change the contract, the DAC is retained and amortized over the life of the modified contract and any acquisition costs associated with the related modification are expensed as incurred.
Liability for Unpaid Claims	Liabilities for policy and contract claims primarily represent liabilities for claims under medical stop-loss, group life and DI, and individual life policies. These liabilities are established on the basis of reported losses. The Company also provides for claims incurred but not reported (IBNR). For medical stop-loss and group life and DI policies, this is based on expected loss ratios, claims paying completion patterns and historical experience. If expected loss ratios increase or expected claims paying completion patterns extend, the IBNR claim liability increases. The Company reviews estimates for reported but unpaid claims and IBNR claims quarterly. Any necessary adjustments are reflected in earnings.
Commitments and Contingencies	Because of the nature of its business, the Company is subject to legal actions filed or threatened in the ordinary course of its business operations. The Company establishes liabilities for litigation and regulatory actions when it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. For matters where a loss is believed to be reasonably possible, but not probable, no liability is established. For such matters, the Company may provide an estimate of the possible loss or range of loss or a statement that such an estimate cannot be made. The Company reviews relevant information with respect to litigation and regulatory matters on a quarterly basis and updates its established liabilities, disclosures and estimates of reasonably possible losses or range of loss based on such reviews. Although the Company cannot predict the outcome of any litigation or regulatory action, the Company does not believe that any such matters will have an impact on its financial condition or results of operations that differs materially from the Company’s established liabilities. Given the inherent difficulty in predicting the outcome of such matters, however, it is possible that an adverse outcome in certain such matters could be material to the Company’s financial condition or results of operations for any particular reporting period.
Segment Information	The Company offers a broad range of products and services that include retirement, employment-based benefits, and life insurance products. These operations are managed separately as three divisions. In the third quarter 2018, and as a result of the Reinsurance Transaction, the Company revised its segments into three business segments based on product groupings and information used by management: Benefits, Retirement, and Individual Life. The Company also has a four th reportable segment, Other, consisting primarily of unallocated corporate items and surplus investment income. The results from operations related to the business exited through the Reinsurance Transaction are reported as the "Closed Block" and included in the consolidated financial statements. The income (loss) related to the Closed Block is excluded from the profitability measures used by management, which results in more informative financial trends from the Company's core business and better aligns results with how the Company manages its segments. Prior period results have been adjusted to reflect this change. The primary profitability measure that management uses to manage business segment results is adjusted pre-tax income (loss), which is defined as income from operations excluding results of the Closed Block, intangible asset amortization, and certain net realized gains (losses). Excluded gains (losses) are associated with: ◦ investment sales or disposal, ◦ investment impairments, ◦ changes in the fair value of mark-to-market investments and derivative investments (except for certain index options discussed below), and ◦ changes in the fair value of embedded derivatives related to the Company's indexed products. In the Retirement segment, net gains (losses) on certain index options purchased to economically hedge exposure from FIA products sold in the late 1990s are included in adjusted pre-tax income. The accounting policies of the segments are the same as those described for the Company, except for the method of capital allocation. The Company has an internally developed risk-based capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. This model accounts for the unique and specific nature of the risks inherent in the Company’s segments. A portion of net investment income on surplus investments, but not the invested assets, is allocated to the segments based on the level of allocated capital.
Reinsurance	The Company reinsures portions of its risk in order to limit losses and manage its statutory capital position. Reinsurance agreements are evaluated for risk transfer to determine if they qualify for reinsurance accounting. If they qualify, the Company accounts for reinsurance premiums, commissions, expense reimbursements, benefits and reserves related to reinsured business on bases consistent with those used in accounting for the original policies issued and the terms of the reinsurance contracts. If the agreements do not qualify, they are accounted for on a deposit contract basis. The Company remains liable to its policyholders to the extent that counterparties to reinsurance contracts do not meet their contractual obligations. Accordingly, the future policy benefit reserves and policy and contract claims liabilities are reported gross of any related reinsurance recoverables, which are reported as assets. The Company reports premiums, benefits, and settlement expenses net of reinsurance in the consolidated statements of income (loss). Assets and liabilities and premiums and benefits relating to certain reinsurance agreements that grant surplus relief may be recorded net on the consolidated balance sheets and statements of income (loss) if a right of offset exists within the reinsurance agreement.
Income Taxes	Symetra Life files a consolidated federal income tax return with its wholly-owned subsidiaries. Income taxes have been determined using the liability method. The provision for income taxes has three components: amounts currently payable or receivable, unrecognized tax benefits, and deferred income taxes. The deferred income taxes are calculated as the difference between the book and tax bases of the appropriate assets and liabilities and are measured using enacted tax rates. The Company files income tax returns in the U.S. federal and various state jurisdictions. The Company's federal and state income tax returns are open for examination for tax years 2013 through the present. The Company receives investment tax credits from its investments in certain limited partnerships. These are accounted for using the flow-through method. Refer to Note 4 for further discussion of our tax credit investments.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Significant Accounting Policies Described in Other Notes	The following table includes significant accounting policies that are described in other notes to the financial statements, including the number of the note. Significant Accounting Policy Note # Other Intangible Assets 3 Goodwill 3 Investments 4 Mortgage Loans 5 Derivative Financial Instruments 6 Fair Value of Financial Instruments 7 Deferred Policy Acquisition Costs (DAC) 8 Value of Business Acquired (VOBA) 8 Liability for Unpaid Claims 9 Commitments and Contingencies 11 Segment Information 12 Reinsurance 13 Income Taxes 14

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Identified Finite-Lived Intangible Assets	The following table sets forth the gross carrying amounts and accumulated amortization for identified intangible assets as of December 31, 2018 and 2017: As of December 31, 2018 As of December 31, 2017 Useful Life on Acquisition Date Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization VODA 35 years $ 782.0 $ (66.2 ) $ 782.0 $ (43.5 ) VOCRA 10 years 361.8 (105.5 ) 361.8 (69.4 ) Trade names 17 years 190.0 (32.6 ) 190.0 (21.4 ) Technology 5 years 72.0 (42.0 ) 72.0 (27.6 ) Total intangible assets subject to amortization 24.3 years 1,405.8 (246.3 ) 1,405.8 (161.9 ) Insurance licenses Indefinite 11.0 — 11.0 — Total intangible assets $ 1,416.8 $ (246.3 ) $ 1,416.8 $ (161.9 )
Schedule of Identified Indefinite-Lived Intangible Assets	The following table sets forth the gross carrying amounts and accumulated amortization for identified intangible assets as of December 31, 2018 and 2017: As of December 31, 2018 As of December 31, 2017 Useful Life on Acquisition Date Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization VODA 35 years $ 782.0 $ (66.2 ) $ 782.0 $ (43.5 ) VOCRA 10 years 361.8 (105.5 ) 361.8 (69.4 ) Trade names 17 years 190.0 (32.6 ) 190.0 (21.4 ) Technology 5 years 72.0 (42.0 ) 72.0 (27.6 ) Total intangible assets subject to amortization 24.3 years 1,405.8 (246.3 ) 1,405.8 (161.9 ) Insurance licenses Indefinite 11.0 — 11.0 — Total intangible assets $ 1,416.8 $ (246.3 ) $ 1,416.8 $ (161.9 )
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The following table sets forth the estimated future aggregate amortization expense for the next 5 years: Year Amount 2019 $ 84.5 2020 84.5 2021 70.9 2022 69.6 2023 69.6
Schedule of Goodwill	The following table presents the Company's goodwill by segment: As of As of Segment goodwill: Benefits $ 308.0 $ 308.0 Retirement 249.0 249.0 Individual Life 6.0 6.0 Total goodwill $ 563.0 $ 563.0

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Summaries of Available-for-sale Fixed Maturities	The following tables summarize the Company's available-for-sale (AFS) securities: As of December 31, 2018 Cost or Gross Gross Fair Value U.S. government and agencies $ 435.9 $ 3.0 $ (6.1 ) $ 432.8 State and political subdivisions 737.0 2.4 (10.5 ) 728.9 Corporate securities 24,074.0 204.5 (587.1 ) 23,691.4 Residential mortgage-backed securities 2,435.6 6.5 (60.9 ) 2,381.2 Commercial mortgage-backed securities 867.2 4.0 (12.8 ) 858.4 Collateralized loan obligations 933.6 0.2 (21.2 ) 912.6 Other debt obligations 1,171.4 14.3 (11.7 ) 1,174.0 Total $ 30,654.7 $ 234.9 $ (710.3 ) $ 30,179.3 As of December 31, 2017 Cost or Gross Gross Fair Value Fixed maturities: U.S. government and agencies $ 426.9 $ 0.2 $ (4.9 ) $ 422.2 State and political subdivisions 794.3 5.0 (6.9 ) 792.4 Corporate securities 23,223.8 768.9 (60.5 ) 23,932.2 Residential mortgage-backed securities 2,516.0 6.6 (49.8 ) 2,472.8 Commercial mortgage-backed securities 795.0 3.8 (3.1 ) 795.7 Collateralized loan obligations 1,128.1 18.5 — 1,146.6 Other debt obligations 715.1 9.8 (5.5 ) 719.4 Total fixed maturities 29,599.2 812.8 (130.7 ) 30,281.3 Marketable equity securities 611.4 150.7 (6.4 ) 755.7 Total $ 30,210.6 $ 963.5 $ (137.1 ) $ 31,037.0
Schedules of Corporate Fixed Securities Portfolio by Sector and Mortgage Loans by Risk Category	The following table presents the composition of the Company's corporate securities portfolio by sector: As of December 31, 2018 As of December 31, 2017 Fair Value % of Total Fair Value % of Total Consumer staples $ 5,707.7 24.1 $ 5,779.5 24.1 Industrial 4,281.2 18.1 4,737.1 19.8 Energy 2,892.4 12.2 2,457.7 10.3 Financials 2,660.8 11.2 2,535.0 10.6 Utilities 2,652.0 11.2 2,739.2 11.4 Telecommunication services 2,230.0 9.4 2,248.6 9.4 Consumer discretionary 2,110.9 8.9 2,010.8 8.4 Other 1,156.4 4.9 1,424.3 6.0 Total $ 23,691.4 100.0 % $ 23,932.2 100.0 % The following table sets forth the Company's mortgage loans by risk category: As of December 31, 2018 As of December 31, 2017 Balance % Balance % Lower risk $ 1,965.2 66.9 % $ 1,486.1 69.8 % Medium risk 727.6 24.8 486.3 22.8 Higher risk 244.7 8.3 157.6 7.4 Subtotal, excluding certain PGAAP loans 2,937.5 100.0 2,130.0 100.0 Lower risk 2,586.9 73.0 2,899.2 70.7 Medium risk 745.9 21.0 896.8 21.8 Higher risk 211.2 6.0 308.4 7.5 Subtotal, certain PGAAP loans (1) 3,544.0 100.0 % 4,104.4 100.0 % Loans specifically evaluated for impairment (2) — 4.8 Other (3) 3.6 2.0 Total $ 6,485.1 $ 6,241.2 ________________ (1) Represents loans set to fair value on February 1, 2016 for which there are no indications of subsequent credit deterioration. (2) As of both December 31, 2018 and 2017, no reserves were held for loans specifically evaluated for impairment. (3) Includes allowance for loan losses and deferred fees and costs.
Summary of Fair Value of Available-for-sale Securities in a Continuous Unrealized Loss Position	The following tables summarize gross unrealized losses and fair values of the Company's available-for-sale investments. The tables are aggregated by investment category and present separately those securities that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. As of December 31, 2018 Less Than 12 Months 12 Months or More Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities U.S. government and agencies $ 11.2 $ (0.3 ) 3 $ 199.9 $ (5.8 ) 31 State and political subdivisions 55.3 (0.7 ) 10 512.2 (9.8 ) 80 Corporate securities 10,978.2 (318.5 ) 971 6,704.3 (268.6 ) 440 Residential mortgage-backed securities 258.0 (3.4 ) 67 1,864.1 (57.5 ) 469 Commercial mortgage-backed securities 110.1 (3.6 ) 16 461.2 (9.2 ) 45 Collateralized loan obligations 811.2 (19.8 ) 45 41.1 (1.4 ) 3 Other debt obligations 188.9 (2.8 ) 15 324.6 (8.9 ) 39 Total $ 12,412.9 $ (349.1 ) 1,127 $ 10,107.4 $ (361.2 ) 1,107 As of December 31, 2017 Less Than 12 Months 12 Months or More Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities Fixed maturities: U.S. government and agencies $ 111.2 $ (0.3 ) 4 $ 206.2 $ (4.6 ) 30 State and political subdivisions 311.8 (2.8 ) 48 169.7 (4.1 ) 36 Corporate securities 4,963.8 (34.3 ) 396 1,257.7 (26.2 ) 82 Residential mortgage-backed securities 693.4 (7.7 ) 176 1,509.9 (42.1 ) 351 Commercial mortgage-backed securities 296.5 (1.4 ) 24 60.5 (1.7 ) 19 Collateralized loan obligations 10.0 — 1 — — — Other debt obligations 218.0 (2.5 ) 32 109.3 (3.0 ) 13 Total fixed maturities 6,604.7 (49.0 ) 681 3,313.3 (81.7 ) 531 Marketable equity securities 34.8 (3.3 ) 153 40.7 (3.1 ) 9 Total $ 6,639.5 $ (52.3 ) 834 $ 3,354.0 $ (84.8 ) 540
Summary of Amortized Costs and Fair Values of Fixed Maturities	The following table summarizes the amortized costs and fair values of available-for-sale fixed maturities as of December 31, 2018 , by contractual years to maturity. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. Amortized Cost Fair Value One year or less $ 1,372.5 $ 1,365.6 Over one year through five years 8,659.2 8,563.0 Over five years through ten years 10,408.1 10,199.1 Over ten years 4,893.0 4,811.9 Total fixed maturities with contractual maturity dates 25,332.8 24,939.6 Residential mortgage-backed securities 2,435.6 2,381.2 Commercial mortgage-backed securities 867.2 858.4 Collateralized loan obligations 933.6 912.6 Other asset-backed securities 1,085.5 1,087.5 Total fixed maturities $ 30,654.7 $ 30,179.3
Summary of Net Investment Income	The following table summarizes the Company's net investment income: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Fixed maturities – AFS $ 1,104.3 $ 1,055.8 $ 915.3 $ 95.5 Fixed maturities – Trading 11.2 — — — Marketable equity securities 12.9 17.9 19.4 0.3 Mortgage loans 277.8 239.9 195.1 21.3 Other 15.8 9.9 7.1 (4.1 ) Total investment income 1,422.0 1,323.5 1,136.9 113.0 Investment expenses (45.5 ) (39.4 ) (35.6 ) (3.3 ) Ceded net investment income (1) (170.7 ) — — — Net investment income $ 1,205.8 $ 1,284.1 $ 1,101.3 $ 109.7 ____________________ (1) Ceded net investment income represents statutory-basis investment income in the Closed Block.
Summary of Net Realized Gains (Losses)	The following table summarizes the Company's net realized gains (losses): Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Fixed maturities – AFS: Gross gains on sales $ 39.9 $ 23.1 $ 20.7 $ 2.4 Gross losses on sales (49.9 ) (10.4 ) (24.3 ) (1.2 ) Net impairment losses (7.8 ) (6.4 ) (10.7 ) (3.8 ) Marketable equity securities (1) 10.1 30.9 23.3 (22.5 ) Total return swaps (47.7 ) (4.3 ) (22.8 ) — Fixed maturities – Trading (2) (41.0 ) — — — Investments in limited partnerships (42.7 ) (54.9 ) (47.1 ) (0.6 ) Net gains (losses) – FIA (3) (6.9 ) 23.9 (14.3 ) (4.4 ) Annual unlocking impact (39.2 ) 20.1 9.8 — DAC and VOBA adjustment (3.0 ) (8.0 ) 9.3 (0.4 ) Embedded derivative – Closed Block 67.0 — — — Ceded realized (gains) losses (4) (132.7 ) — — — Other (5) 3.7 (12.1 ) (54.2 ) 3.6 Net realized gains (losses) $ (250.2 ) $ 1.9 $ (110.3 ) $ (26.9 ) ____________________ (1) Includes net losses on changes in the fair value of equity securities held totaling $(17.5) for the year ended December 31, 2018. The majority of the Company's equity investments were sold during 2018 in connection with the Reinsurance Transaction. (2) Includes net losses on changes in the fair value of fixed maturities – trading securities held totaling $(21.4) for year ended December 31, 2018. (3) Includes changes in fair value of the FIA embedded derivative (VED) and related options, excluding options related to the Company's block of FIA business sold during the late 1990s. (4) Includes ceded realized statutory (gains) losses on sales of assets supporting the Closed Block. (5) Includes net gains (losses) related to calls and redemptions, certain derivatives not designated for hedge accounting, commercial mortgage loans, and other instruments. For more information on net gain (losses) on derivatives not designated as hedges, refer to Note 6.
Summary of Write-Downs on Available-For-Sale Fixed Maturities	The largest write-downs recorded through net realized gains (losses) on fixed maturities were related to investments in the following sectors: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Amount % of Total Amount % of Total Amount % of Total Amount % of Total U.S. Federal Government (1) $ 2.9 37.2 $ 3.1 48.4 $ 3.7 34.6 $ — — Consumer Discretionary 1.3 16.7 — — — — — — Energy 1.1 14.1 — — 0.4 3.7 3.8 100.0 Financials 0.8 10.2 0.1 1.6 4.2 39.3 — — Telecommunication services 0.7 9.0 2.6 40.6 — — — — Other 1.0 12.8 0.6 — 9.4 2.4 — 22.4 — — — Net impairment losses recognized in earnings $ 7.8 100.0 % $ 6.4 100.0 % $ 10.7 100.0 % $ 3.8 100.0 % ____________________ (1) Impairments on U.S. Federal Government securities are due to the Company's intent to sell and reflect the impact of interest rate movements.
Summary of Severity and Duration of Unrealized Losses On Available-For-Sale Fixed Maturities	The following table presents the severity and duration of the gross unrealized losses on the Company's underwater available-for-sale fixed maturities, after the recognition of OTTI: As of December 31, 2018 As of December 31, 2017 Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities Fixed maturities – AFS: Underwater by 20% or more: Less than 6 consecutive months $ 81.9 $ (23.7 ) 26 $ 5.2 $ (1.7 ) 6 6 consecutive months or more 1.3 (1.8 ) 6 0.9 (0.8 ) 3 Total underwater by 20% or more 83.2 (25.5 ) 32 6.1 (2.5 ) 9 All other underwater fixed maturities 22,437.1 (684.8 ) 2,243 9,911.9 (128.2 ) 1,203 Total underwater fixed maturities $ 22,520.3 $ (710.3 ) 2,275 $ 9,918.0 $ (130.7 ) 1,212
Changes in the Amount of Credit-related OTTI Recognized in Earnings	Changes in the amount of credit-related OTTI recognized in net income when the portion related to other factors was recognized in other comprehensive income (loss) (OCI) were as follows: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to January 31, 2016 Balance, beginning of period $ 3.8 $ 4.4 $ — $ 27.7 Increases recognized in the current period: For which an OTTI was not previously recognized 1.5 0.2 4.1 — For which an OTTI was previously recognized — — 0.9 — Decreases attributable to: Securities sold or paid down during the period (0.9 ) (0.8 ) (0.6 ) (0.4 ) Balance, end of period $ 4.4 $ 3.8 $ 4.4 $ 27.3
Schedule of the Impact of Housing Investments on Net Income	The following table sets forth the impact of low-income housing project investments on net income. These amounts do not include the impacts of the Company's holdings in other types of tax credit investments. Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Pass through activity $ (22.6 ) $ (27.4 ) $ (24.0 ) $ (2.1 ) Write downs (22.3 ) (25.6 ) (1.0 ) (0.5 ) Tax benefits 9.4 18.6 8.8 0.9 Tax credits, net 40.0 34.7 35.5 3.1 Impact to net income $ 4.5 $ 0.3 $ 19.3 $ 1.4

Mortgage Loans (Tables)

Mortgage Loans (Tables)	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Schedules of Corporate Fixed Securities Portfolio by Sector and Mortgage Loans by Risk Category	The following table presents the composition of the Company's corporate securities portfolio by sector: As of December 31, 2018 As of December 31, 2017 Fair Value % of Total Fair Value % of Total Consumer staples $ 5,707.7 24.1 $ 5,779.5 24.1 Industrial 4,281.2 18.1 4,737.1 19.8 Energy 2,892.4 12.2 2,457.7 10.3 Financials 2,660.8 11.2 2,535.0 10.6 Utilities 2,652.0 11.2 2,739.2 11.4 Telecommunication services 2,230.0 9.4 2,248.6 9.4 Consumer discretionary 2,110.9 8.9 2,010.8 8.4 Other 1,156.4 4.9 1,424.3 6.0 Total $ 23,691.4 100.0 % $ 23,932.2 100.0 % The following table sets forth the Company's mortgage loans by risk category: As of December 31, 2018 As of December 31, 2017 Balance % Balance % Lower risk $ 1,965.2 66.9 % $ 1,486.1 69.8 % Medium risk 727.6 24.8 486.3 22.8 Higher risk 244.7 8.3 157.6 7.4 Subtotal, excluding certain PGAAP loans 2,937.5 100.0 2,130.0 100.0 Lower risk 2,586.9 73.0 2,899.2 70.7 Medium risk 745.9 21.0 896.8 21.8 Higher risk 211.2 6.0 308.4 7.5 Subtotal, certain PGAAP loans (1) 3,544.0 100.0 % 4,104.4 100.0 % Loans specifically evaluated for impairment (2) — 4.8 Other (3) 3.6 2.0 Total $ 6,485.1 $ 6,241.2 ________________ (1) Represents loans set to fair value on February 1, 2016 for which there are no indications of subsequent credit deterioration. (2) As of both December 31, 2018 and 2017, no reserves were held for loans specifically evaluated for impairment. (3) Includes allowance for loan losses and deferred fees and costs.
Allowance for Mortgage Loan Losses	The following table summarizes the activity in the Company’s allowance for mortgage loan losses, which includes portfolio and specific reserves: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Allowance at beginning of period (1) $ 1.0 $ 0.7 $ — $ 8.1 Provision for specific loans 0.6 — — — Provision for loans not specifically identified 0.5 0.3 0.7 — Charge-offs (0.6 ) — — — Allowance at end of period $ 1.5 $ 1.0 $ 0.7 $ 8.1 ________________ (1) Balance was reset to $0.0 on February 1, 2016 due to PGAAP.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	The following table sets forth the fair value of the Company's derivative instruments: As of December 31, 2018 As of December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities Derivatives designated as hedges: Cash flow hedges: Interest rate swaps $ 916.6 $ 1.5 $ — $ 968.1 $ 1.5 $ 1.4 Foreign currency swaps 801.3 115.4 3.1 686.2 75.5 5.6 Total derivatives designated as hedges $ 1,717.9 $ 116.9 $ 3.1 $ 1,654.3 $ 77.0 $ 7.0 Derivatives not designated as hedges: Index options $ 8,231.5 $ 61.8 $ 0.6 $ 6,696.1 $ 261.9 $ 1.5 Embedded derivatives – Indexed products — — 871.5 — — 797.5 Embedded derivative – Closed Block (1) — 67.0 — — — — Other derivatives 25.2 0.2 0.7 22.2 0.2 — Total derivatives not designated as hedges 8,256.7 129.0 872.8 6,718.3 262.1 799.0 Total derivatives $ 9,974.6 $ 245.9 $ 875.9 $ 8,372.6 $ 339.1 $ 806.0 _______________________ (1) Changes in the fair value of the embedded derivative related to the Closed Block are recorded as an adjustment to the funds withheld liability on the consolidated balance sheets.
Schedule of Derivative Liabilities at Fair Value	The following table sets forth the fair value of the Company's derivative instruments: As of December 31, 2018 As of December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value Assets Liabilities Assets Liabilities Derivatives designated as hedges: Cash flow hedges: Interest rate swaps $ 916.6 $ 1.5 $ — $ 968.1 $ 1.5 $ 1.4 Foreign currency swaps 801.3 115.4 3.1 686.2 75.5 5.6 Total derivatives designated as hedges $ 1,717.9 $ 116.9 $ 3.1 $ 1,654.3 $ 77.0 $ 7.0 Derivatives not designated as hedges: Index options $ 8,231.5 $ 61.8 $ 0.6 $ 6,696.1 $ 261.9 $ 1.5 Embedded derivatives – Indexed products — — 871.5 — — 797.5 Embedded derivative – Closed Block (1) — 67.0 — — — — Other derivatives 25.2 0.2 0.7 22.2 0.2 — Total derivatives not designated as hedges 8,256.7 129.0 872.8 6,718.3 262.1 799.0 Total derivatives $ 9,974.6 $ 245.9 $ 875.9 $ 8,372.6 $ 339.1 $ 806.0 _______________________ (1) Changes in the fair value of the embedded derivative related to the Closed Block are recorded as an adjustment to the funds withheld liability on the consolidated balance sheets.
Potential Effect of Netting Arrangements, Assets	The following tables present the potential effect of netting arrangements by counterparty on the Company's consolidated balance sheets: As of December 31, 2018 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Balance Sheets Financial Instruments (1) Cash Collateral Received Net Amount Counterparty: Assets: A $ 18.1 $ (2.6 ) $ (15.5 ) $ — B 60.1 (0.6 ) (59.5 ) — C 18.7 — (18.7 ) — E 11.8 — (11.8 ) — G 15.9 — (15.6 ) 0.3 H 11.0 (0.5 ) (10.5 ) — I 16.3 — (16.0 ) 0.3 Other 27.0 (0.7 ) (24.1 ) 2.2 Total derivative assets (2) $ 178.9 $ (4.4 ) $ (171.7 ) $ 2.8 _______________________ (1) Represents amount of offsetting derivative liabilities that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative assets for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty. As of December 31, 2017 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Balance Sheets Financial Instruments (1) Cash Collateral Received Net Amount Counterparty: Assets: A $ 46.1 $ (4.2 ) $ (41.9 ) $ — B 63.6 (1.4 ) (62.2 ) — C 13.2 — (13.2 ) — E 21.3 — (21.3 ) — F 31.6 (1.3 ) (29.0 ) 1.3 G 30.2 — (30.2 ) — H 51.9 (1.0 ) (50.9 ) — I 34.6 — (32.9 ) 1.7 J 42.7 — (42.7 ) — Other 3.9 (0.6 ) (3.3 ) — Total derivative assets $ 339.1 $ (8.5 ) $ (327.6 ) $ 3.0 _______________________ (1) Represents amount of offsetting derivative liabilities that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative assets for presentation on the consolidated balance sheets.
Potential Effect of Netting Arrangements, Liabilities	As of December 31, 2018 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Financial Instruments (1) Cash Collateral Posted Net Amount Counterparty: Liabilities: A $ 2.6 $ (2.6 ) $ — $ — B 0.6 (0.6 ) — — H 0.5 (0.5 ) — — Other 0.7 (0.7 ) — — Total derivative liabilities (2) $ 4.4 $ (4.4 ) $ — $ — _______________________ (1) Represents amount of offsetting derivative assets that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative liabilities for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty. As of December 31, 2017 Gross Amounts not Offset in the Consolidated Balance Sheets Fair Value Presented in the Financial Cash Collateral Posted Net Amount Counterparty: Liabilities: A $ 4.2 $ (4.2 ) $ — $ — B 1.4 (1.4 ) — — F 1.3 (1.3 ) — — Other 1.6 (1.6 ) — — Total derivative liabilities (2) $ 8.5 $ (8.5 ) $ — $ — _______________________ (1) Represents amount of offsetting derivative assets that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative liabilities for presentation on the consolidated balance sheets. (2) Excludes embedded derivatives that have no counterparty.
Schedule of Gain (Loss) Recognized in OCI on Derivatives	The following table presents the amount of gain (loss) recognized in OCI on derivatives qualifying and designated as cash flow hedges: Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Interest rate swaps $ (3.3 ) $ (2.9 ) $ (18.9 ) $ 11.3 Foreign currency swaps 46.5 (64.6 ) 62.5 29.1 Total $ 43.2 $ (67.5 ) $ 43.6 $ 40.4
Schedule of Effects of Derivatives Not Designated as Hedges	The following table shows the effect of derivatives not designated as hedges in the consolidated statements of income (loss), which is recorded in net realized gains (losses): Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Index options $ (141.1 ) $ 170.0 $ 84.3 $ (33.2 ) Interest rate swaps 3.2 0.9 (0.3 ) 3.7 Total return swaps (47.4 ) (4.3 ) (22.8 ) — Futures (13.1 ) 3.7 0.8 — Embedded derivatives – Indexed products 88.5 (118.6 ) (84.5 ) 29.4 Embedded derivative – Closed Block 67.0 — — — Other derivatives — 0.3 1.4 0.1 Total $ (42.9 ) $ 52.0 $ (21.1 ) $ —

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis and Those not Carried at Fair Value	The following tables present the fair value of the Company's financial instruments classified by the valuation hierarchy described above. The financial instruments are separated between those measured at fair value on a recurring basis and those not carried at fair value, but for which disclosure of fair value is required. As of December 31, 2018 Carrying Amount Fair Value Level 1 Level 2 Level 3 Measured at fair value on a recurring basis: Financial assets: Fixed maturities, available-for-sale: U.S. government and agencies $ 432.8 $ 432.8 $ — $ 432.8 $ — State and political subdivisions 728.9 728.9 — 728.9 — Corporate securities 23,691.4 23,691.4 — 23,405.8 285.6 Residential mortgage-backed securities 2,381.2 2,381.2 — 2,381.2 — Commercial mortgage-backed securities 858.4 858.4 — 858.4 — Collateralized loan obligations 912.6 912.6 — 912.6 — Other debt obligations 1,174.0 1,174.0 — 1,123.2 50.8 Total fixed maturities, available-for-sale 30,179.3 30,179.3 — 29,842.9 336.4 Fixed maturities, trading 1,095.8 1,095.8 — 1,095.8 — Marketable equity securities 97.7 97.7 85.2 12.0 0.5 Derivatives: Index options 61.8 61.8 — 61.8 — Foreign currency swaps 115.4 115.4 — 115.4 — Other 1.7 1.7 0.2 1.5 — Total derivatives 178.9 178.9 0.2 178.7 — Total investments carried at fair value 31,551.7 31,551.7 85.4 31,129.4 336.9 Embedded derivative – Closed Block 67.0 67.0 — — 67.0 Separate account assets 904.3 904.3 904.3 — Total assets at fair value $ 32,523.0 $ 32,523.0 $ 989.7 $ 31,129.4 $ 403.9 Financial liabilities: Embedded derivatives – Indexed products $ 871.5 $ 871.5 $ — $ — $ 871.5 Subject to fair value disclosure requirements: Financial assets: Mortgage loans $ 6,485.1 $ 6,349.0 $ — $ — $ 6,349.0 Investments in limited partnerships, tax credit investments (1) 130.1 122.0 — — 122.0 Cash and cash equivalents 227.3 227.3 227.3 — — Deposit asset 5,920.4 6,750.4 — — 6,750.4 Financial liabilities: Funds held under deposit contracts (2): Deferred annuities $ 22,797.7 $ 21,946.8 $ — $ — $ 21,946.8 Income annuities 474.6 470.4 — — 470.4 Closed Block 6,594.4 6,750.4 — — 6,750.4 Funds withheld liability (3) 5,656.9 6,084.5 — — 6,084.5 _______________________ (1) Fair value includes obligations for future investment contributions of $8.4 , which is reflected as a liability on the consolidated balance sheets. (2) The carrying value of this balance excludes $8,407.6 of liabilities related to insurance contracts and embedded derivatives. (3) The carrying value of this balance excludes $(67.0) related to the Closed Block embedded derivative. As of December 31, 2017 Carrying Amount Fair Value Level 1 Level 2 Level 3 Measured at fair value on a recurring basis: Financial assets: Fixed maturities, available-for-sale: U.S. government and agencies $ 422.2 $ 422.2 $ — $ 422.2 $ — State and political subdivisions 792.4 792.4 — 792.4 — Corporate securities 23,932.2 23,932.2 — 23,731.4 200.8 Residential mortgage-backed securities 2,472.8 2,472.8 — 2,472.8 — Commercial mortgage-backed securities 795.7 795.7 — 795.6 0.1 Collateralized loan obligations 1,146.6 1,146.6 — 1,146.6 — Other debt obligations 719.4 719.4 — 677.9 41.5 Total fixed maturities, available-for-sale 30,281.3 30,281.3 — 30,038.9 242.4 Marketable equity securities 755.7 755.7 722.6 26.8 6.3 Derivatives: Index options 261.9 261.9 — 222.4 39.5 Foreign currency swaps 75.5 75.5 — 75.5 — Other 1.7 1.7 0.2 1.5 — Total derivatives 339.1 339.1 0.2 299.4 39.5 Total investments carried at fair value 31,376.1 31,376.1 722.8 30,365.1 288.2 Separate account assets 978.1 978.1 978.1 — — Total assets at fair value $ 32,354.2 $ 32,354.2 $ 1,700.9 $ 30,365.1 $ 288.2 Financial liabilities: Embedded derivatives – Indexed products $ 797.5 $ 797.5 $ — $ — $ 797.5 Subject to fair value disclosure requirements: Financial assets: Mortgage loans $ 6,241.2 $ 6,180.8 $ — $ — $ 6,180.8 Investments in limited partnerships, tax credit investments (1) 173.0 135.1 — — 135.1 Cash and cash equivalents 347.5 347.5 347.5 — — Financial liabilities: Funds held under deposit contracts (2): Deferred annuities $ 20,128.3 $ 19,943.3 $ — $ — $ 19,943.3 Closed Block 7,202.5 8,080.5 — — 8,080.5 _______________________ (1) Fair value includes obligations for future investment contributions of $32.8 , which is reflected as a liability on the consolidated balance sheets. (2) The carrying value of this balance excludes $8,015.1 of liabilities related to insurance contracts and embedded derivatives.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2018 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2018 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2018 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 200.8 $ 26.4 $ — $ 78.4 $ (4.7 ) $ — $ (15.3 ) $ — $ 285.6 Commercial mortgage-backed securities 0.1 — — — (0.1 ) — — — — Other debt obligations 41.5 12.1 — — 0.1 — (2.9 ) — 50.8 Total fixed maturities, available-for-sale 242.4 38.5 — 78.4 (4.7 ) — (18.2 ) — 336.4 Marketable equity securities 6.3 — — (5.8 ) — — — — 0.5 Derivatives: Index options 39.5 — — (38.7 ) — 0.9 — (1.7 ) — Embedded derivative – Closed Block — — — — — 67.0 — — 67.0 Total Level 3 assets $ 288.2 $ 38.5 $ — $ 33.9 $ (4.7 ) $ 67.9 $ (18.2 ) $ (1.7 ) $ 403.9 Financial Liabilities: Embedded derivatives – Indexed products $ 797.5 $ 179.4 $ (16.9 ) $ — $ — $ (88.5 ) $ — $ — $ 871.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into Level 3 are generally the result of observable market information on a security no longer being available or utilized by pricing vendors. Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $81.9 for the year ended December 31, 2018 . Gross transfers out of Level 3 were $48.0 for the year ended December 31, 2018 . (3) Other includes transactions such as pay downs, calls, amortization, and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss). The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2017 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2017 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2017 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 57.0 $ 87.9 $ — $ 57.2 $ (9.0 ) $ — $ 7.8 $ (0.1 ) $ 200.8 Commercial mortgage-backed securities 0.9 — — — (0.8 ) — — — 0.1 Other debt obligations 7.6 — — 28.7 0.7 — 4.5 — 41.5 Total fixed maturities, available-for-sale 65.5 87.9 — 85.9 (9.1 ) — 12.3 (0.1 ) 242.4 Marketable equity securities 5.9 — — 0.1 — — 0.3 — 6.3 Derivatives: Index options 7.0 22.7 — — (14.5 ) 26.0 — (1.7 ) 39.5 Other — 0.9 — — (0.6 ) — — (0.3 ) — Total derivatives 7.0 23.6 — — (15.1 ) 26.0 — (2.0 ) 39.5 Total Level 3 assets $ 78.4 $ 111.5 $ — $ 86.0 $ (24.2 ) $ 26.0 $ 12.6 $ (2.1 ) $ 288.2 Financial Liabilities: Embedded derivatives – Indexed products $ 532.4 $ 162.6 $ (8.0 ) $ — $ (8.1 ) $ 118.6 $ — $ — $ 797.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $86.0 for the year ended December 31, 2017 . Gross transfers out of Level 3 were $0.0 for the year ended December 31, 2017 . (3) Other includes transactions such as pay downs, calls, amortization and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss).
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2018 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2018 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2018 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 200.8 $ 26.4 $ — $ 78.4 $ (4.7 ) $ — $ (15.3 ) $ — $ 285.6 Commercial mortgage-backed securities 0.1 — — — (0.1 ) — — — — Other debt obligations 41.5 12.1 — — 0.1 — (2.9 ) — 50.8 Total fixed maturities, available-for-sale 242.4 38.5 — 78.4 (4.7 ) — (18.2 ) — 336.4 Marketable equity securities 6.3 — — (5.8 ) — — — — 0.5 Derivatives: Index options 39.5 — — (38.7 ) — 0.9 — (1.7 ) — Embedded derivative – Closed Block — — — — — 67.0 — — 67.0 Total Level 3 assets $ 288.2 $ 38.5 $ — $ 33.9 $ (4.7 ) $ 67.9 $ (18.2 ) $ (1.7 ) $ 403.9 Financial Liabilities: Embedded derivatives – Indexed products $ 797.5 $ 179.4 $ (16.9 ) $ — $ — $ (88.5 ) $ — $ — $ 871.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into Level 3 are generally the result of observable market information on a security no longer being available or utilized by pricing vendors. Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $81.9 for the year ended December 31, 2018 . Gross transfers out of Level 3 were $48.0 for the year ended December 31, 2018 . (3) Other includes transactions such as pay downs, calls, amortization, and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss). The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which the Company has utilized significant unobservable inputs (Level 3) to determine fair value for the year ended December 31, 2017 : Unrealized Gains (Losses) Included in: Balance as of January 1, 2017 Purchases and Issues(1) Sales and Settlements(1) Transfers In and/or (Out) of Level 3(2) Other(3) Net Income(4) Other Comprehensive Income (5) Realized Gains (Losses)(4) Balance as of December 31, 2017 Financial Assets: Fixed maturities, available-for-sale: Corporate securities $ 57.0 $ 87.9 $ — $ 57.2 $ (9.0 ) $ — $ 7.8 $ (0.1 ) $ 200.8 Commercial mortgage-backed securities 0.9 — — — (0.8 ) — — — 0.1 Other debt obligations 7.6 — — 28.7 0.7 — 4.5 — 41.5 Total fixed maturities, available-for-sale 65.5 87.9 — 85.9 (9.1 ) — 12.3 (0.1 ) 242.4 Marketable equity securities 5.9 — — 0.1 — — 0.3 — 6.3 Derivatives: Index options 7.0 22.7 — — (14.5 ) 26.0 — (1.7 ) 39.5 Other — 0.9 — — (0.6 ) — — (0.3 ) — Total derivatives 7.0 23.6 — — (15.1 ) 26.0 — (2.0 ) 39.5 Total Level 3 assets $ 78.4 $ 111.5 $ — $ 86.0 $ (24.2 ) $ 26.0 $ 12.6 $ (2.1 ) $ 288.2 Financial Liabilities: Embedded derivatives – Indexed products $ 532.4 $ 162.6 $ (8.0 ) $ — $ (8.1 ) $ 118.6 $ — $ — $ 797.5 _______________ (1) Issues and settlements are related to the Company's embedded derivative liabilities. (2) Transfers into and/or out of Level 3 are reported at the value as of the beginning of the period in which the transfer occurs. Gross transfers into Level 3 were $86.0 for the year ended December 31, 2017 . Gross transfers out of Level 3 were $0.0 for the year ended December 31, 2017 . (3) Other includes transactions such as pay downs, calls, amortization and redemptions. (4) Amounts are included in net realized gains (losses) on the consolidated statements of income (loss). Amounts shown for financial liabilities are (gains) losses in net income. (5) Amounts are generally included in changes in unrealized gains (losses) on available-for-sale securities on the consolidated statements of comprehensive income (loss).

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA) (Tables)	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Deferred Policy Acquisition Costs	The following table provides a reconciliation of the beginning and ending balance for DAC: Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Unamortized balance at beginning of period $ 407.2 $ 202.8 $ — $ 677.5 Deferral of acquisition costs 260.6 239.9 215.4 19.6 Adjustments for realized (gains) losses (1) (1.5 ) (4.6 ) (1.6 ) (0.4 ) Amortization – excluding unlocking (39.7 ) (30.9 ) (9.9 ) (8.4 ) Amortization – impact of unlocking (1) (4.1 ) — (1.1 ) (0.2 ) Adjustment for Closed Block (2) (12.6 ) — — — Unamortized balance at end of period 609.9 407.2 202.8 688.1 Accumulated effect of net unrealized (gains) losses 34.4 (21.0 ) (3.4 ) (41.0 ) Balance at end of period $ 644.3 $ 386.2 $ 199.4 $ 647.1 ___________________ (1) Includes the impact of assumption and experience unlocking related to quarterly investment prepayment activity, as well as the Company's annual unlocking process, which takes place during the third quarter of each year. Adjustments for realized (gains) losses also includes the impact from annual unlocking. (2) The DAC balance associated with policies reinsured under the Reinsurance Transaction was reclassified to the beginning balance of the deposit asset.
Present Value of Future Insurance Profits	The following table provides a reconciliation of the beginning and ending balance for VOBA: Successor For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 Unamortized balance at beginning of period $ 358.1 $ 413.4 $ 457.6 Adjustments related to realized (gains) losses (1) 10.1 (11.9 ) 4.5 Amortization – excluding unlocking (42.8 ) (41.8 ) (40.7 ) Amortization – impact of unlocking (1) (5.1 ) (1.6 ) (8.0 ) Unamortized balance at end of period 320.3 358.1 413.4 Accumulated effect of net unrealized (gains) losses 58.4 (48.1 ) (16.1 ) Balance at end of period $ 378.7 $ 310.0 $ 397.3 ___________________ (1) Includes the impact of assumption and experience unlocking related to quarterly investment prepayment activity, as well as the Company's annual unlocking process, which takes place during the third quarter of each year. Adjustments for realized (gains) losses also includes the impact from annual unlocking.
Present Value of Future Insurance Profits, Expected Amortization	The following table sets forth the estimated future VOBA amortization expense, net of interest, for the next 5 years, based on the balance recorded as of December 31, 2018: Year Amount 2019 $ 40.3 2020 35.0 2021 29.8 2022 24.3 2023 18.2

Liability for Unpaid Claims a_2

Liability for Unpaid Claims and Claim Adjustment Expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense	The following tables provide reconciliations of the beginning and ending liability balances for unpaid claims and claims adjustment expenses (CAE) disaggregated by medical stop-loss, group life and DI, and other. These reserves include policy and contract claims and certain amounts recorded in future policy benefits on the consolidated balance sheets. Medical Stop-Loss Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Balance, beginning of period $ 153.1 $ 114.6 $ 113.1 $ 122.9 Less: reinsurance recoverables 12.4 7.7 3.4 3.6 Net balance, beginning of period 140.7 106.9 109.7 119.3 Incurred related to insured events of: The current year 502.3 460.6 351.9 28.1 Prior years (2.7 ) 7.5 (5.2 ) (0.5 ) Total incurred 499.6 468.1 346.7 27.6 Paid related to insured events of: The current year 370.1 331.2 276.7 1.9 Prior years 127.2 103.1 72.8 35.3 Total paid 497.3 434.3 349.5 37.2 Net balance, end of period 143.0 140.7 106.9 109.7 Add: reinsurance recoverables 6.4 12.4 7.7 3.4 Balance, end of period $ 149.4 $ 153.1 $ 114.6 $ 113.1 Group Life and DI Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Balance, beginning of period $ 184.2 $ 149.9 $ 122.2 $ 119.8 Less: reinsurance recoverables 41.9 48.4 76.7 76.9 Net balance, beginning of period 142.3 101.5 45.5 42.9 Incurred related to insured events of: The current year 199.7 150.4 122.6 6.8 Prior years (2.2 ) 2.7 5.7 0.5 Total incurred 197.5 153.1 128.3 7.3 Paid related to insured events of: The current year 106.2 79.1 52.5 0.2 Prior years 43.9 33.2 19.8 4.5 Total paid 150.1 112.3 72.3 4.7 Net balance, end of period 189.7 142.3 101.5 45.5 Add: reinsurance recoverables 40.3 41.9 48.4 76.7 Balance, end of period $ 230.0 $ 184.2 $ 149.9 $ 122.2 Successor Company Predecessor Company Other For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to January 31, 2016 Balance, beginning of period $ 29.6 $ 33.0 $ 27.2 $ 24.5 Less: reinsurance recoverables 4.7 6.7 3.8 4.4 Net balance, beginning of period 24.9 26.3 23.4 20.1 Incurred related to insured events of: The current year 118.1 111.0 99.3 7.6 Prior years 3.8 (0.1 ) 4.8 2.5 Total incurred 121.9 110.9 104.1 10.1 Paid related to insured events of: The current year 93.1 93.1 85.4 1.5 Prior years 21.2 19.2 15.8 5.3 Total paid 114.3 112.3 101.2 6.8 Net balance, end of period 32.5 24.9 26.3 23.4 Add: reinsurance recoverables 4.5 4.7 6.7 3.8 Balance, end of period $ 37.0 $ 29.6 $ 33.0 $ 27.2
Short-duration Insurance Contracts, Claims Development	Medical Stop-Loss For the Years Ended December 31, As of December 31, 2018 Related IBNR Reserves Cumulative Number of Reported Claims Year of Insured Event 2017 2018 Incurred Claims, Net of Reinsurance: 2017 $ 460.6 $ 466.6 $ 8.5 5,753 2018 502.3 105.4 3,079 Total $ 968.9 $ 113.9 Cumulative Paid Claims, Net of Reinsurance: 2017 $ 331.2 $ 455.8 2018 370.1 Total 825.9 Liabilities for unpaid claims prior to 2016, net of reinsurance — Total liabilities for unpaid claims, net of reinsurance $ 143.0 Group Life and DI For the Years Ended December 31, As of December 31, 2018 2013 2014 2015 2016 2017 Related IBNR Reserves Cumulative Number of Reported Claims Year of Insured Event (Unaudited) 2018 Incurred Claims, Net of Reinsurance: 2013 $ 21.9 $ 23.5 $ 23.0 $ 26.6 $ 27.5 $ 27.7 $ — 1,613 2014 41.3 42.1 56.2 56.1 58.0 — 3,895 2015 73.6 92.1 90.8 90.0 — 5,702 2016 106.5 105.6 103.5 — 6,889 2017 157.9 153.1 5.1 9,714 2018 208.1 50.5 11,506 Total $ 640.4 $ 55.6 Cumulative Paid Claims, Net of Reinsurance: 2013 $ 15.1 $ 19.7 $ 21.3 $ 22.0 $ 22.8 $ 23.2 2014 25.3 32.6 35.9 39.8 42.3 2015 39.9 57.1 66.1 69.8 2016 53.4 74.2 80.1 2017 80.7 112.0 2018 106.2 Total $ 433.6 Liabilities for unpaid claims prior to 2013, net of reinsurance 2.4 Total liabilities for unpaid claims, net of reinsurance $ 209.2
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability	The reconciliation of the December 31, 2018 net incurred and paid claims development tables to the unpaid claims liability is as follows: Reconciliation of the Claims Development Information to the Liability for Unpaid Claims and CAE As of December 31, 2018 Net outstanding liabilities for unpaid claims Medical Stop-Loss $ 143.0 Group Life and DI 209.2 Other 4.1 Liabilities for unpaid claims, net of reinsurance 356.3 Reinsurance recoverable on unpaid claims Medical Stop-Loss 6.4 Group Life and DI 40.3 Other — Total reinsurance recoverable on unpaid claims 46.7 Insurance lines other than short duration, net 32.9 Impact of discounting (19.5 ) Total gross liability for unpaid claims $ 416.4
Short-duration Insurance Contracts, Schedule of Historical Claims Duration	The following is required unaudited supplementary information about average historical percentage payout of incurred claims by age, net of reinsurance. The calculation uses the amount of claims paid in each development year compared with the estimated incurred claims as of December 31, 2018: Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Unaudited) Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Group Life and DI 49.7 % 17.8 % 6.7 % 4.5 % 3.5 % 1.5 %

Stockholder's Equity (Tables)

Stockholder's Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the year ended December 31, 2018 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2018 $ 642.7 $ (0.3 ) $ (63.6 ) $ (27.7 ) $ 551.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) (959.8 ) (0.9 ) 157.0 34.1 (769.6 ) Reclassifications recorded in: Net investment income: Interest rate swaps — — — (2.0 ) (2.0 ) Foreign currency swaps — — — 5.0 5.0 Net realized (gains) losses 18.6 — (9.4 ) 3.1 12.3 Total provision (benefit) for income taxes (3.9 ) — 2.0 (1.3 ) (3.2 ) Total reclassifications from AOCI, net of taxes 14.7 — (7.4 ) 4.8 12.1 Other comprehensive income (loss) after reclassifications (945.1 ) (0.9 ) 149.6 38.9 (757.5 ) Adoption of new accounting standard (3) (114.3 ) — — — (114.3 ) Balance as of December 31, 2018 $ (416.7 ) $ (1.2 ) $ 86.0 $ 11.2 $ (320.7 ) ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $(255.1) , $(0.3) , $41.8 , $9.0 , and $(204.6) , respectively, for the year ended December 31, 2018 . Tax effects in OCI are calculated based on the applicable enacted tax rate at the time gains (losses) are incurred. (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income. (3) Accounting Standards Update No. 2016-01, Financial Instruments (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities. Refer to Note 2 for further discussion. (4) Includes net unrealized losses of $42.0 for the year ended December 31, 2018 related to changes in exchange rates on fixed maturities held in foreign currencies. The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the year ended December 31, 2017 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2017 $ 137.6 $ (0.2 ) $ (14.0 ) $ 17.7 $ 141.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) 432.9 (0.1 ) (52.7 ) (44.5 ) 335.6 Reclassifications recorded in: Net investment income: Interest rate swaps — — — 0.1 0.1 Foreign currency swaps — — — (2.7 ) (2.7 ) Net realized (gains) losses (32.9 ) — 16.6 7.8 (8.5 ) Total provision (benefit) for income taxes 11.5 — (5.8 ) (1.8 ) 3.9 Total reclassifications from AOCI, net of taxes (21.4 ) — 10.8 3.4 (7.2 ) Other comprehensive income (loss) after reclassifications 411.5 (0.1 ) (41.9 ) (41.1 ) 328.4 Adoption of new accounting standard (3) 93.6 — (7.7 ) (4.3 ) 81.6 Balance as of December 31, 2017 $ 642.7 $ (0.3 ) $ (63.6 ) $ (27.7 ) $ 551.1 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $201.9 , $0.0 , $(22.8) , $(23.0) , and $156.1 , respectively, for the period year ended December 31, 2017 . Tax effects in OCI are calculated based on the applicable enacted tax rate at the time gains (losses) are incurred. (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income (loss). (3) Accounting Standards Update No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The following tables summarize the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the period February 1 to December 31, 2016 (Successor Company): Net Unrealized OTTI on Fixed Adjustment Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of February 1, 2016 $ — $ — $ — $ — $ — Other comprehensive income (loss) before reclassifications, net of taxes (1) 128.6 (0.3 ) (11.5 ) 28.3 145.1 Reclassifications recorded in: Net investment income: Interest rate swaps — — — (6.6 ) (6.6 ) Foreign currency swaps — — — (9.0 ) (9.0 ) Net realized (gains) losses 13.8 0.1 (3.7 ) (0.8 ) 9.4 Total provision (benefit) for income taxes (4.8 ) — 1.2 5.8 2.2 Total reclassifications from AOCI, net of taxes 9.0 0.1 (2.5 ) (10.6 ) (4.0 ) Other comprehensive income (loss) after reclassifications 137.6 (0.2 ) (14.0 ) 17.7 141.1 Balance as of December 31, 2016 $ 137.6 $ (0.2 ) $ (14.0 ) $ 17.7 $ 141.1 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $69.3 , $(0.1) , $(6.3) , $15.3 , and $78.2 , respectively, for the period February 1 to December 31, 2016 . (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income. The following table summarizes the components of AOCI and the adjustments to OCI for amounts reclassified from AOCI into net income for the period January 1 to January 31, 2016 (Predecessor Company): Net Unrealized Gains (Losses) on Available-for- sale Securities OTTI on Fixed Maturities not related to Credit Losses (2) Adjustment for DAC Net Gains (Losses) on Cash Flow Hedges Accumulated Balance as of January 1, 2016 $ 521.7 $ (17.7 ) $ (28.1 ) $ 42.2 $ 518.1 Other comprehensive income (loss) before reclassifications, net of taxes (1) 111.6 — (24.7 ) 26.2 113.1 Reclassifications recorded in: Net investment income: Interest rate swaps — — — (0.6 ) (0.6 ) Foreign currency swaps — — — (1.0 ) (1.0 ) Net realized (gains) losses 2.6 — 0.5 — 3.1 Total provision (benefit) for income taxes (0.9 ) — (0.2 ) 0.6 (0.5 ) Total reclassifications from AOCI, net of taxes 1.7 — 0.3 (1.0 ) 1.0 Other comprehensive income (loss) after reclassifications 113.3 — (24.4 ) 25.2 114.1 Balance as of January 31, 2016 $ 635.0 $ (17.7 ) $ (52.5 ) $ 67.4 $ 632.2 ___________________ (1) Other comprehensive income (loss) before reclassifications is net of taxes of $60.1 , $0.0 , $(13.3) , $14.2 , and $61.0 , respectively, for the period January 1 to January 31, 2016 . (2) Reclassification adjustments of OTTI on fixed maturities not related to credit losses are included in changes in unrealized gains and losses on available-for-sale securities within the consolidated statements of comprehensive income.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Commitments	Future minimum lease commitments, including cost escalation clauses, for the next five years and thereafter are as follows: Lease Payments 2019 $ 10.2 2020 9.3 2021 5.1 2022 2.9 2023 2.3 Thereafter 3.2 Total $ 33.0

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Selected Financial Information by Segment	The following table presents selected financial information by segment and reconciles segment pre-tax adjusted operating income (loss) to amounts reported in the consolidated statements of income (loss): Successor Company Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Segment adjusted pre-tax income (loss): Benefits $ 52.4 $ 34.3 $ 35.8 $ 7.9 Retirement 111.7 106.2 60.8 10.3 Individual Life 16.0 19.9 17.1 0.5 Other (16.6 ) (44.2 ) (62.8 ) (2.8 ) Total segment adjusted pre-tax income 163.5 116.2 50.9 15.9 Add (deduct) the following: Excluded realized gains (losses) (70.4 ) 44.1 (12.5 ) (4.0 ) Amortization of intangible assets (82.8 ) (81.1 ) (74.3 ) — Closed Block results (132.8 ) 35.5 (15.8 ) (24.7 ) Income (loss) from operations before income taxes $ (122.5 ) $ 114.7 $ (51.7 ) $ (12.8 ) The following table presents total adjusted revenue by segment: Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Segment adjusted revenue: Benefits $ 1,014.4 $ 898.0 $ 711.8 $ 61.3 Retirement 782.8 708.9 573.1 58.3 Individual Life 569.3 513.0 420.8 41.7 Other (16.9 ) (41.9 ) (37.1 ) (2.4 ) Total segment adjusted revenue 2,349.6 2,078.0 1,668.6 158.9 Add: Excluded realized gains (losses) (70.4 ) 44.1 (12.5 ) (4.0 ) Add: Closed Block revenue 2.0 336.1 272.5 7.4 Total Revenue $ 2,281.2 $ 2,458.2 $ 1,928.6 $ 162.3 Segment adjusted revenue represents segment revenue excluding certain net realized gains and losses, as described above, and excludes revenue in the Closed Block. The following table presents total assets by segment: As of As of Segment assets: Benefits $ 1,468.4 $ 1,467.3 Retirement 25,077.7 23,968.5 Individual Life 8,005.9 7,836.0 Other 2,356.7 1,769.0 Total segment assets 36,908.7 35,040.8 Add: Closed Block assets (1) 12,052.8 7,513.4 Total Assets $ 48,961.5 $ 42,554.2 ____________________ (1) Includes deposit asset and invested assets related to Closed Block. The following tables provide supplementary insurance information by segment: For the Year Ended December 31, 2018 Premium Revenue Net Investment Income Benefits, Claims, and Interest Credited Amortization of DAC and VOBA Other Underwriting and Operating Expenses Successor Company Benefits $ 979.8 $ 30.3 $ 719.8 $ 5.6 $ 236.6 Retirement — 762.2 470.1 76.3 124.7 Individual Life 33.5 261.7 435.0 8.4 109.9 Other — 28.2 — — (0.3 ) Segment total 1,013.3 1,082.4 1,624.9 90.3 470.9 Add: Closed Block — 123.4 109.8 1.4 21.9 Total $ 1,013.3 $ 1,205.8 $ 1,734.7 $ 91.7 $ 492.8 For the Year Ended December 31, 2017 Premium Revenue Net Investment Income Benefits, Claims, and Interest Credited Amortization of DAC and VOBA Other Underwriting and Operating Expenses Successor Company Benefits $ 867.4 $ 25.7 $ 640.2 $ 2.8 $ 220.7 Retirement — 698.7 426.8 60.8 115.1 Individual Life 32.1 242.1 385.6 8.7 98.8 Other — 14.3 — — 2.3 Segment total 899.5 980.8 1,452.6 72.3 436.9 Add: Closed Block — 303.3 279.7 2.0 15.6 Total $ 899.5 $ 1,284.1 $ 1,732.3 $ 74.3 $ 452.5 February 1 to December 31, 2016 Premium Revenue Net Investment Income Benefits, claims, and interest credited Amortization of DAC and VOBA Underwriting and operating expenses Successor Company Benefits $ 686.7 $ 18.8 $ 497.6 $ 0.6 $ 177.8 Retirement — 579.5 357.6 56.5 98.2 Individual Life 30.8 202.9 313.9 1.9 87.9 Other — 11.3 — — 25.7 Segment total 717.5 812.5 1,169.1 59.0 389.6 Add: Closed Block — 288.8 267.5 0.7 17.0 Total $ 717.5 $ 1,101.3 $ 1,436.6 $ 59.7 $ 406.6 January 1 to January 31, 2016 Premium Revenue Net Investment Income Benefits, claims, and interest credited Amortization of DAC and VOBA Underwriting and operating expenses Predecessor Company Benefits $ 58.6 $ 2.1 $ 37.1 $ 0.2 $ 16.1 Retirement — 57.3 33.4 6.6 8.0 Individual Life 2.6 22.9 32.7 1.2 7.3 Other — (2.4 ) — — 0.4 Segment total 61.2 79.9 103.2 8.0 31.8 Add: Closed Block — 29.8 30.1 0.6 1.2 Total $ 61.2 $ 109.7 $ 133.3 $ 8.6 $ 33.0 As of December 31, 2018 As of December 31, 2017 DAC and VOBA Future Policy Benefits, Losses, Claims, and Loss Expense (1) Other Policyholders' Funds (2) DAC and VOBA Future Policy Benefits, Losses, Claims, and Loss Expense (1) Other Policyholders' Funds (2) Benefits $ 9.5 $ 386.4 $ 32.7 $ 7.7 $ 344.7 $ 29.3 Retirement 627.6 23,598.7 54.3 422.0 21,350.2 22.7 Individual Life 385.9 7,551.3 50.2 250.2 7,221.9 47.0 Other — — 12.1 — — 14.9 Segment total 1,023.0 31,536.4 149.3 679.9 28,916.8 113.9 Add: Closed Block — 6,594.3 — 16.3 7,124.5 4.0 Total $ 1,023.0 $ 38,130.7 $ 149.3 $ 696.2 $ 36,041.3 $ 117.9 ____________________ (1) Includes funds held under deposit contracts, future policy benefits, and policy and contract claims on the consolidated balance sheets. (2) Includes unearned premiums.

Reinsurance (Tables)

Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Schedule of Net Life Insurance in Force	The following table sets forth net life insurance in force: As of As of As of Direct life insurance in force $ 116,515.7 $ 109,179.4 $ 86,142.8 Amounts assumed from other companies 188.4 188.1 187.0 Amounts ceded to other companies (29,612.4 ) (26,473.9 ) (24,452.4 ) Net life insurance in force $ 87,091.7 $ 82,893.6 $ 61,877.4 Percentage of amount assumed to net 0.22 % 0.23 % 0.30 % Percentage of amount ceded to direct 25.41 % 24.25 % 28.39 %
Schedule of Reinsurance Recoverables	Reinsurance recoverables are composed of the following amounts: As of As of Life insurance Reinsurance recoverables on: Funds held under deposit contracts $ 104.7 $ 102.4 Future policy benefits 135.4 134.3 Paid claims, expense allowance, premium tax recoverables and other 14.2 18.7 Policy and contract claims 6.4 5.8 Total life insurance 260.7 261.2 Accident and health insurance Reinsurance recoverables on: Future policy benefits 37.5 40.3 Paid claims, expense allowance, premium tax recoverables and other 3.7 4.0 Policy and contract claims 6.4 12.7 Total accident and health insurance 47.6 57.0 Total reinsurance recoverables $ 308.3 $ 318.2
The Effects of Reinsurance on Premiums and Policy Fees and Contract Charges	The following table sets forth the effect of reinsurance on premiums and policy fees and contract charges. It is disaggregated by accident and health, and life insurance and investment-type products, which are short- and long-duration contracts, respectively. Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Premiums: Direct: Accident and health $ 879.9 $ 798.7 $ 626.3 $ 56.7 Life insurance 205.9 171.1 127.5 10.7 Total direct 1,085.8 969.8 753.8 67.4 Total assumed 1.2 0.9 0.3 — Ceded: Accident and health (1) (27.4 ) (26.4 ) (0.6 ) (4.0 ) Life insurance (46.3 ) (44.8 ) (36.0 ) (2.2 ) Total ceded (73.7 ) (71.2 ) (36.6 ) (6.2 ) Total premiums 1,013.3 899.5 717.5 61.2 Policy fees and contract charges: Direct life insurance and investment-type 318.4 278.0 220.8 18.0 Ceded life insurance and investment-type (15.0 ) (12.4 ) (8.1 ) (0.4 ) Total policy fees and contract charges (2) 303.4 265.6 212.7 17.6 Total premiums and other amounts assessed to policyholders $ 1,316.7 $ 1,165.1 $ 930.2 $ 78.8 Percentage of assumed to total premiums and other amounts assessed to policyholders 0.09 % 0.08 % 0.03 % — % _______________ (1) Successor Company ceded premiums reflect long-term disability income business recaptured during 2016. (2) Total policy fees and contract charges represents amounts charged to policyholders other than premiums and recorded in policy fees, contract charges and other in the consolidated statements of income (loss). This primarily consists of cost of insurance charges.
Schedule of Reconciliation of Deposit Asset and Funds Withheld Liability	The following table provides a reconciliation of the beginning and ending balance for the deposit asset and funds withheld liability: For the Year Ended December 31, 2018 Deposit asset at inception $ 6,072.6 Incurred interest adjustment (152.2 ) Deposit asset at end of period $ 5,920.4 Funds withheld liability at inception $ 5,700.0 Ceded investment amounts 303.4 Ceded benefit amounts (313.0 ) Quarterly settlement due to reinsurer (33.5 ) Changes in fair value of embedded derivative (67.0 ) Funds withheld liability at end of period $ 5,589.9

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	Differences between income taxes computed by applying the U.S. federal income tax rate of 21% (35% in 2017 and prior) to income (loss) from operations before income taxes and the provision (benefit) for income taxes were as follows: Successor Company Predecessor Company For the Year Ended For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Income (loss) from operations before income taxes $ (122.5 ) $ 114.7 $ (51.7 ) $ (12.8 ) Tax provision (benefit) at U.S. Federal statutory rate (25.7 ) 21.0 % 40.2 35.0 % (18.1 ) 35.0 % (4.5 ) 35.0 % Increase (reduction) in rate resulting from: Impact of change in enacted tax rates on deferred tax balances (7.7 ) 6.3 (151.0 ) (131.6 ) — — — — Investment tax credits (40.6 ) 33.1 (37.0 ) (32.3 ) (52.0 ) 100.8 (4.1 ) 32.0 Dividends received deduction (1.7 ) 1.4 (4.0 ) (3.5 ) (1.0 ) 1.9 (0.1 ) 0.8 Other (0.6 ) 0.5 6.4 5.6 0.6 (1.3 ) (0.2 ) 1.6 Provision (benefit) for income taxes $ (76.3 ) 62.3 % $ (145.4 ) (126.8 )% $ (70.5 ) 136.4 % $ (8.9 ) 69.4 %
Schedule of Deferred Tax Assets and Liabilities	The following table sets forth the tax effects of temporary differences that gave rise to the deferred income tax assets and liabilities. Deferred income tax assets and liabilities were measured at a corporate tax rate of 21% as of December 31, 2018 and 2017 . As of As of Deferred income tax assets: Adjustments to life policy liabilities $ 340.0 $ 452.6 Unrealized losses on investment securities (net of DAC and VOBA adjustment: $22.9 for 2018) 85.3 — Net operating losses 26.8 — Investment tax credit carryforward 63.1 — Other 12.4 13.3 Total deferred income tax assets 527.6 465.9 Deferred income tax liabilities: Deferred policy acquisition costs 52.7 24.4 Basis adjustment on securities 115.0 210.4 Unrealized gains on investment securities (net of DAC and VOBA adjustment: $16.9 for 2017) — 146.5 Intangible assets and VOBA 322.7 325.7 Other 7.4 10.0 Total deferred income tax liabilities 497.8 717.0 Deferred income tax asset (liability), net $ 29.8 $ (251.1 )

Statutory-Basis Information (Ta

Statutory-Basis Information (Tables)	12 Months Ended
	Dec. 31, 2018
Insurance [Abstract]
Schedule of Statutory Net Income and Statutory Capital and Surplus	The statutory net income (loss) and statutory capital and surplus for Symetra Life and its subsidiaries are as follows: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 For the Year Ended December 31, 2016 Statutory net income (loss): Symetra Life $ (118.7 ) $ 267.8 $ 43.4 Subsidiaries 0.5 11.1 7.3 Statutory capital and surplus: Symetra Life (1) $ 2,126.6 $ 2,218.9 $ 2,082.4 Subsidiaries 158.0 135.9 134.0 _______________ (1) Symetra Life’s surplus includes the balances of its three wholly-owned subsidiaries, First Symetra National Life Insurance Company of New York, Symetra National Life Insurance Company and Symetra Reinsurance Corporation.

Related Parties (Tables)

Related Parties (Tables)	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Schedule of Recorded Balances and Transactions with Related Parties	Balances and transactions with related parties recorded in the Company’s consolidated financial statements were as follows: As of As of Balances with Parent and affiliates: Receivables $ 0.1 $ 0.1 Payables 22.9 17.1 Successor Predecessor Company For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 February 1 to December 31, 2016 January 1 to Transactions with Parent and affiliates: Payments related to commutation endorsements (1) $ 5.6 $ 7.8 $ 7.4 $ 0.6 Shared services expenses allocated, net (2) 8.4 6.9 6.1 0.4 Concessions, general agent fees, administrative and underwriting fees (3) 10.2 10.7 8.0 0.9 ___________________ (1) Commutation endorsements reduce the reserves reported in funds held under deposit contracts on the consolidated balance sheets and interest credited on the consolidated statements of income (loss), net of related payments. (2) Reported primarily in other underwriting and operating expenses on the consolidated statements of income (loss). (3) Reported in policy fees, contract charges, and other on the consolidated statements of income (loss).

Description of Business (Detail

Description of Business (Details) $ in Billions	Sep. 30, 2018USD ($)
Resolution Re Ltd.
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance agreement for in force income annuities	$ 6.8

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Jan. 01, 2018	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum borrowing capacity from FHLB DM			$ 11,400
Net unrealized gains, reclassified from AOCI to RE		$ 137.7	(945.1)	$ 411.5
FHLB
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Outstanding funding agreement			105.7
Fair value of pledged collateral			221.2
Investments in limited partnerships | Not Primary Beneficiary
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum exposure to loss			131.2	176.3
Structured Securities | Not Primary Beneficiary
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum exposure to loss			$ 5,424	$ 5,053.9
Retained Earnings | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net unrealized gains, reclassified from AOCI to RE	$ 114.3
Taxes on reclassified unrealized gains, net	30.4
Accumulated Other Comprehensive Income | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net unrealized gains, reclassified from AOCI to RE	(114.3)
Taxes on reclassified unrealized gains, net	$ (30.4)
Subsequent event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset established					$ 6.6
Operating lease liability					$ 6.6

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Gross Carrying Amounts and Accumulated Amortization for Identified Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Useful Life on Acquisition Date	24 years 3 months 19 days
Finite-lived intangible assets, Gross Carrying Amount	$ 1,405.8	$ 1,405.8
Accumulated Amortization	(246.3)	(161.9)
indefinite-lived intangible assets, Gross Carrying Amount	11	11
Total intangible assets	$ 1,416.8	1,416.8
VODA
Finite-Lived Intangible Assets [Line Items]
Useful Life on Acquisition Date	35 years
Finite-lived intangible assets, Gross Carrying Amount	$ 782	782
Accumulated Amortization	$ (66.2)	(43.5)
VOCRA
Finite-Lived Intangible Assets [Line Items]
Useful Life on Acquisition Date	10 years
Finite-lived intangible assets, Gross Carrying Amount	$ 361.8	361.8
Accumulated Amortization	$ (105.5)	(69.4)
Trade names
Finite-Lived Intangible Assets [Line Items]
Useful Life on Acquisition Date	17 years
Finite-lived intangible assets, Gross Carrying Amount	$ 190	190
Accumulated Amortization	$ (32.6)	(21.4)
Technology
Finite-Lived Intangible Assets [Line Items]
Useful Life on Acquisition Date	5 years
Finite-lived intangible assets, Gross Carrying Amount	$ 72	72
Accumulated Amortization	$ (42)	$ (27.6)

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Estimated Future Aggregate Amortization Expense (Details) $ in Millions	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 84.5
2020	84.5
2021	70.9
2022	69.6
2023	$ 69.6

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Goodwill by Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 563,000,000	$ 563,000,000
Goodwill impairment	0
Benefits
Goodwill [Line Items]
Goodwill	308,000,000	308,000,000
Retirement
Goodwill [Line Items]
Goodwill	249,000,000	249,000,000
Individual Life
Goodwill [Line Items]
Goodwill	$ 6,000,000	$ 6,000,000

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Invested assets supporting closed block		$ 5,900
Commercial mortgage loan carrying value		1,200
Fixed maturity securities fair value		4,800
Closed block fixed maturity securities book value		4,700
Closed block restricted cash		50.5
Fair value of closed block trading securities		1,100
Fixed maturities, at fair value		30,179.3	$ 30,281.3
Fixed maturities, amortized cost		30,654.7	29,599.2
Investments in limited partnerships		130.1	173
Impairment caused by decrease in expected tax benefit			18.4
Corporate securities
Investment [Line Items]
Fixed maturities, at fair value		23,691.4	23,932.2
Fixed maturities, amortized cost		$ 24,074	$ 23,223.8
Concentration risk percentage		100.00%	100.00%
Other debt obligations
Investment [Line Items]
Fixed maturities, at fair value		$ 1,174	$ 719.4
Fixed maturities, amortized cost		$ 1,171.4	$ 715.1
Fixed maturities – AFS
Investment [Line Items]
Concentration risk percentage	100.00%	100.00%	100.00%
Corporate securities
Investment [Line Items]
Fair value of closed block trading securities		$ 918.9
Tax Credit Investments
Investment [Line Items]
Investments in limited partnerships		130.1	$ 173
Low-Income Housing Project Investments | Tax Credit Investments
Investment [Line Items]
Investments in limited partnerships		122.3	165.8
Below Investment Grade | Fixed maturities – AFS
Investment [Line Items]
Fixed maturities, at fair value		868	1,111.4
Fixed maturities, amortized cost		$ 888	$ 1,029.6
Concentration risk percentage		2.90%	3.70%

Investments - Unrealized Gains

Investments - Unrealized Gains and Losses on Available-for-sale and Marketable Securities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fixed maturities:
Cost or Amortized Cost	$ 30,654.7	$ 29,599.2
Gross Unrealized Gains	234.9	812.8
Gross Unrealized Losses	(710.3)	(130.7)
Fair Value	30,179.3	30,281.3
Marketable equity securities
Cost or Amortized Cost		611.4
Gross Unrealized Gains		150.7
Gross Unrealized Losses		(6.4)
Fair Value		755.7
Cost or Amortized Cost		30,210.6
Gross Unrealized Gains		963.5
Gross Unrealized Losses		137.1
Fair Value		31,037
U.S. government and agencies
Fixed maturities:
Cost or Amortized Cost	435.9	426.9
Gross Unrealized Gains	3	0.2
Gross Unrealized Losses	(6.1)	(4.9)
Fair Value	432.8	422.2
State and political subdivisions
Fixed maturities:
Cost or Amortized Cost	737	794.3
Gross Unrealized Gains	2.4	5
Gross Unrealized Losses	(10.5)	(6.9)
Fair Value	728.9	792.4
Corporate securities
Fixed maturities:
Cost or Amortized Cost	24,074	23,223.8
Gross Unrealized Gains	204.5	768.9
Gross Unrealized Losses	(587.1)	(60.5)
Fair Value	23,691.4	23,932.2
Residential mortgage-backed securities
Fixed maturities:
Cost or Amortized Cost	2,435.6	2,516
Gross Unrealized Gains	6.5	6.6
Gross Unrealized Losses	(60.9)	(49.8)
Fair Value	2,381.2	2,472.8
Commercial mortgage-backed securities
Fixed maturities:
Cost or Amortized Cost	867.2	795
Gross Unrealized Gains	4	3.8
Gross Unrealized Losses	(12.8)	(3.1)
Fair Value	858.4	795.7
Collateralized loan obligations
Fixed maturities:
Cost or Amortized Cost	933.6	1,128.1
Gross Unrealized Gains	0.2	18.5
Gross Unrealized Losses	(21.2)	0
Fair Value	912.6	1,146.6
Other debt obligations
Fixed maturities:
Cost or Amortized Cost	1,171.4	715.1
Gross Unrealized Gains	14.3	9.8
Gross Unrealized Losses	(11.7)	(5.5)
Fair Value	$ 1,174	$ 719.4

Investments - Composition of Co

Investments - Composition of Corporate Securities Portfolio by Sector (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 30,179.3	$ 30,281.3
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 23,691.4	$ 23,932.2
Concentration risk percentage	100.00%	100.00%
Corporate securities | Sector Risk | Consumer staples
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 5,707.7	$ 5,779.5
Concentration risk percentage	24.10%	24.10%
Corporate securities | Sector Risk | Industrial
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 4,281.2	$ 4,737.1
Concentration risk percentage	18.10%	19.80%
Corporate securities | Sector Risk | Energy
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 2,892.4	$ 2,457.7
Concentration risk percentage	12.20%	10.30%
Corporate securities | Sector Risk | Financials
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 2,660.8	$ 2,535
Concentration risk percentage	11.20%	10.60%
Corporate securities | Sector Risk | Utilities
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 2,652	$ 2,739.2
Concentration risk percentage	11.20%	11.40%
Corporate securities | Sector Risk | Telecommunication services
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 2,230	$ 2,248.6
Concentration risk percentage	9.40%	9.40%
Corporate securities | Sector Risk | Consumer discretionary
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 2,110.9	$ 2,010.8
Concentration risk percentage	8.90%	8.40%
Corporate securities | Sector Risk | Other
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, at fair value	$ 1,156.4	$ 1,424.3
Concentration risk percentage	4.90%	6.00%

Investments - Gross Unrealized

Investments - Gross Unrealized Losses on Securities in Continuous Loss Position (Details) $ in Millions	Dec. 31, 2018USD ($)securities	Dec. 31, 2017USD ($)securities
Fixed maturities:
Total, Fair Value		$ 6,639.5
Total, Gross Unrealized Losses		$ (52.3)
Total, Number of Securities | securities		834
Fixed maturities:
Total, Fair Value		$ 3,354
Total, Gross Unrealized Losses		$ (84.8)
Total, Number of Securities | securities		540
U.S. government and agencies
Fixed maturities:
Fair Value	$ 11.2	$ 111.2
Gross Unrealized Losses	$ (0.3)	$ (0.3)
Number of Securities | securities	3	4
Fixed maturities:
Fair Value	$ 199.9	$ 206.2
Gross Unrealized Losses	$ (5.8)	$ (4.6)
Number of Securities | securities	31	30
State and political subdivisions
Fixed maturities:
Fair Value	$ 55.3	$ 311.8
Gross Unrealized Losses	$ (0.7)	$ (2.8)
Number of Securities | securities	10	48
Fixed maturities:
Fair Value	$ 512.2	$ 169.7
Gross Unrealized Losses	$ (9.8)	$ (4.1)
Number of Securities | securities	80	36
Corporate securities
Fixed maturities:
Fair Value	$ 10,978.2	$ 4,963.8
Gross Unrealized Losses	$ (318.5)	$ (34.3)
Number of Securities | securities	971	396
Fixed maturities:
Fair Value	$ 6,704.3	$ 1,257.7
Gross Unrealized Losses	$ (268.6)	$ (26.2)
Number of Securities | securities	440	82
Residential mortgage-backed securities
Fixed maturities:
Fair Value	$ 258	$ 693.4
Gross Unrealized Losses	$ (3.4)	$ (7.7)
Number of Securities | securities	67	176
Fixed maturities:
Fair Value	$ 1,864.1	$ 1,509.9
Gross Unrealized Losses	$ (57.5)	$ (42.1)
Number of Securities | securities	469	351
Commercial mortgage-backed securities
Fixed maturities:
Fair Value	$ 110.1	$ 296.5
Gross Unrealized Losses	$ (3.6)	$ (1.4)
Number of Securities | securities	16	24
Fixed maturities:
Fair Value	$ 461.2	$ 60.5
Gross Unrealized Losses	$ (9.2)	$ (1.7)
Number of Securities | securities	45	19
Collateralized loan obligations
Fixed maturities:
Fair Value	$ 811.2	$ 10
Gross Unrealized Losses	$ (19.8)	$ 0
Number of Securities | securities	45	1
Fixed maturities:
Fair Value	$ 41.1	$ 0
Gross Unrealized Losses	$ (1.4)	$ 0
Number of Securities | securities	3	0
Other debt obligations
Fixed maturities:
Fair Value	$ 188.9	$ 218
Gross Unrealized Losses	$ (2.8)	$ (2.5)
Number of Securities | securities	15	32
Fixed maturities:
Fair Value	$ 324.6	$ 109.3
Gross Unrealized Losses	$ (8.9)	$ (3)
Number of Securities | securities	39	13
Total fixed maturities
Fixed maturities:
Fair Value	$ 12,412.9	$ 6,604.7
Gross Unrealized Losses	$ (349.1)	$ (49)
Number of Securities | securities	1,127	681
Fixed maturities:
Fair Value	$ 10,107.4	$ 3,313.3
Gross Unrealized Losses	$ (361.2)	$ (81.7)
Number of Securities | securities	1,107	531
Marketable equity securities
Fixed maturities:
Marketable equity securities, Fair value		$ 34.8
Marketable equity securities, Gross Unrealized Losses		$ (3.3)
Marketable equity securities, Number of Securities | securities		153
Fixed maturities:
Marketable equity securities		$ 40.7
Marketable equity securities		$ (3.1)
Marketable equity securities | securities		9

Investments - Fixed Maturity Am

Investments - Fixed Maturity Amortized Cost and Fair Value, by Contractual Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost
One year or less	$ 1,372.5
Over one year through five years	8,659.2
Over five years through ten years	10,408.1
Over ten years	4,893
Total fixed maturities with contractual maturity dates	25,332.8
Total fixed maturities, amortized cost	30,654.7	$ 29,599.2
Fair Value
One year or less	1,365.6
Over one year through five years	8,563
Over five years through ten years	10,199.1
Over ten years	4,811.9
Total fixed maturities with contractual maturity dates	24,939.6
Fixed maturities, at fair value	30,179.3	30,281.3
Residential mortgage-backed securities
Amortized Cost
Total fixed maturities, amortized cost	2,435.6	2,516
Fair Value
Fixed maturities, at fair value	2,381.2	2,472.8
Commercial mortgage-backed securities
Amortized Cost
Total fixed maturities, amortized cost	867.2	795
Fair Value
Fixed maturities, at fair value	858.4	795.7
Collateralized loan obligations
Amortized Cost
Total fixed maturities, amortized cost	933.6	1,128.1
Fair Value
Fixed maturities, at fair value	912.6	$ 1,146.6
Other asset-backed securities
Amortized Cost
Total fixed maturities, amortized cost	1,085.5
Fair Value
Fixed maturities, at fair value	$ 1,087.5

Investments - Summary of Net In

Investments - Summary of Net Investment Income (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Net Investment Income [Line Items]
Total investment income		$ 1,136.9	$ 1,422	$ 1,323.5
Investment expenses		(35.6)	(45.5)	(39.4)
Closed Block, Net Investment Income		0	(170.7)	0
Net investment income		1,101.3	1,205.8	1,284.1
Predecessor Company
Net Investment Income [Line Items]
Total investment income	$ 113
Investment expenses	(3.3)
Closed Block, Net Investment Income	0
Net investment income	109.7
Fixed maturities – AFS
Net Investment Income [Line Items]
Total investment income		915.3	1,104.3	1,055.8
Fixed maturities – AFS | Predecessor Company
Net Investment Income [Line Items]
Total investment income	95.5
Fixed maturities – Trading
Net Investment Income [Line Items]
Total investment income		0	11.2	0
Fixed maturities – Trading | Predecessor Company
Net Investment Income [Line Items]
Total investment income	0
Marketable equity securities
Net Investment Income [Line Items]
Total investment income		19.4	12.9	17.9
Marketable equity securities | Predecessor Company
Net Investment Income [Line Items]
Total investment income	0.3
Mortgage loans
Net Investment Income [Line Items]
Total investment income		195.1	277.8	239.9
Mortgage loans | Predecessor Company
Net Investment Income [Line Items]
Total investment income	21.3
Other
Net Investment Income [Line Items]
Total investment income		$ 7.1	$ 15.8	$ 9.9
Other | Predecessor Company
Net Investment Income [Line Items]
Total investment income	$ (4.1)

Investments - Summary of Net Re

Investments - Summary of Net Realized Gains (Losses) (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Gain (Loss) on Securities [Line Items]
Net impairment losses		$ (10.6)	$ (9)	$ (6.5)
Total return swaps		(22.8)	(47.7)	(4.3)
Fixed maturities, trading		0	(41)	0
Investments in limited partnerships		(47.1)	(42.7)	(54.9)
Net gains (losses) - FIA		(14.3)	(6.9)	23.9
Annual unlocking impact		9.8	(39.2)	20.1
DAC and VOBA adjustment		9.3	(3)	(8)
Embedded derivative – Closed Block		0	67	0
Ceded realized (gains) losses		0	(132.7)	0
Other		(54.2)	3.7	(12.1)
Net realized gains (losses)		(110.3)	(250.2)	1.9
Change in fair value of equity securities held			(17.5)
Change in fair value of trading securities gains (losses)			(21.4)
Predecessor Company
Gain (Loss) on Securities [Line Items]
Net impairment losses	$ (3.8)
Total return swaps	0
Fixed maturities, trading	0
Investments in limited partnerships	(0.6)
Net gains (losses) - FIA	(4.4)
Annual unlocking impact	0
DAC and VOBA adjustment	(0.4)
Embedded derivative – Closed Block	0
Ceded realized (gains) losses	0
Other	3.6
Net realized gains (losses)	(26.9)
Fixed maturities – AFS
Gain (Loss) on Securities [Line Items]
Gross gains on sales		20.7	39.9	23.1
Gross losses on sales		(24.3)	(49.9)	(10.4)
Net impairment losses		(10.7)	(7.8)	(6.4)
Marketable equity securities		$ 23.3	$ 10.1	$ 30.9
Fixed maturities – AFS | Predecessor Company
Gain (Loss) on Securities [Line Items]
Gross gains on sales	2.4
Gross losses on sales	(1.2)
Net impairment losses	(3.8)
Marketable equity securities	$ (22.5)

Investments - Largest Write-dow

Investments - Largest Write-downs on Marketable Securities by Sector (Details) - Fixed maturities – AFS - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Net impairment losses recognized in earnings		$ 10.7	$ 7.8	$ 6.4
Concentration risk percentage		100.00%	100.00%	100.00%
Sector Risk | U.S. Federal Government
Investment [Line Items]
Net impairment losses recognized in earnings		$ 3.7	$ 2.9	$ 3.1
Concentration risk percentage		34.60%	37.20%	48.40%
Sector Risk | Consumer discretionary
Investment [Line Items]
Net impairment losses recognized in earnings		$ 0	$ 1.3	$ 0
Concentration risk percentage		0.00%	16.70%	0.00%
Sector Risk | Energy
Investment [Line Items]
Net impairment losses recognized in earnings		$ 0.4	$ 1.1	$ 0
Concentration risk percentage		3.70%	14.10%	0.00%
Sector Risk | Financials
Investment [Line Items]
Net impairment losses recognized in earnings		$ 4.2	$ 0.8	$ 0.1
Concentration risk percentage		39.30%	10.20%	1.60%
Sector Risk | Telecommunication services
Investment [Line Items]
Net impairment losses recognized in earnings		$ 0	$ 0.7	$ 2.6
Concentration risk percentage		0.00%	9.00%	40.60%
Sector Risk | Other
Investment [Line Items]
Net impairment losses recognized in earnings		$ 2.4	$ 1	$ 0.6
Concentration risk percentage		22.40%	12.80%	9.40%
Predecessor Company
Investment [Line Items]
Net impairment losses recognized in earnings	$ 3.8
Concentration risk percentage	100.00%
Predecessor Company | Sector Risk | U.S. Federal Government
Investment [Line Items]
Net impairment losses recognized in earnings	$ 0
Concentration risk percentage	0.00%
Predecessor Company | Sector Risk | Consumer discretionary
Investment [Line Items]
Net impairment losses recognized in earnings	$ 0
Concentration risk percentage	0.00%
Predecessor Company | Sector Risk | Energy
Investment [Line Items]
Net impairment losses recognized in earnings	$ 3.8
Concentration risk percentage	100.00%
Predecessor Company | Sector Risk | Financials
Investment [Line Items]
Net impairment losses recognized in earnings	$ 0
Concentration risk percentage	0.00%
Predecessor Company | Sector Risk | Telecommunication services
Investment [Line Items]
Net impairment losses recognized in earnings	$ 0
Concentration risk percentage	0.00%
Predecessor Company | Sector Risk | Other
Investment [Line Items]
Net impairment losses recognized in earnings	$ 0
Concentration risk percentage	0.00%

Investments - Underwater Availa

Investments - Underwater Available-for-sale Fixed Maturities (Details) - Fixed maturities – AFS $ in Millions	Dec. 31, 2018USD ($)securities	Dec. 31, 2017USD ($)securities
Investment [Line Items]
Fair Value	$ 22,520.3	$ 9,918
Gross Unrealized Losses	$ (710.3)	$ (130.7)
Number of Securities | securities	2,275	1,212
Less than 6 consecutive months
Investment [Line Items]
Fair Value	$ 81.9	$ 5.2
Gross Unrealized Losses	$ (23.7)	$ (1.7)
Number of Securities | securities	26	6
6 consecutive months or more
Investment [Line Items]
Fair Value	$ 1.3	$ 0.9
Gross Unrealized Losses	$ (1.8)	$ (0.8)
Number of Securities | securities	6	3
Total underwater by 20% or more
Investment [Line Items]
Fair Value	$ 83.2	$ 6.1
Gross Unrealized Losses	$ (25.5)	$ (2.5)
Number of Securities | securities	32	9
All other underwater fixed maturities
Investment [Line Items]
Fair Value	$ 22,437.1	$ 9,911.9
Gross Unrealized Losses	$ (684.8)	$ (128.2)
Number of Securities | securities	2,243	1,203

Investments - Changes in Credit

Investments - Changes in Credit-related OTTI Recognized (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period		$ 0	$ 3.8	$ 4.4
Increases recognized in the current period, for which an OTTI was not previously recognized		4.1	1.5	0.2
Increases recognized in the current period, for which an OTTI was previously recognized		0.9	0	0
Decreases attributable to securities sold or paid down during the period		(0.6)	(0.9)	(0.8)
Balance, end of period	$ 0	4.4	$ 4.4	$ 3.8
Predecessor Company
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	27.7	$ 27.3
Increases recognized in the current period, for which an OTTI was not previously recognized	0
Increases recognized in the current period, for which an OTTI was previously recognized	0
Decreases attributable to securities sold or paid down during the period	(0.4)
Balance, end of period	$ 27.3

Investments - Impact of Housing

Investments - Impact of Housing Investments on Net Income (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Tax benefits		$ 70.5	$ 76.3	$ 145.4
Predecessor Company
Investment [Line Items]
Tax benefits	$ 8.9
Low-Income Housing Project Investments
Investment [Line Items]
Pass through activity		(24)	(22.6)	(27.4)
Write downs		(1)	(22.3)	(25.6)
Tax benefits		8.8	9.4	18.6
Tax credits, net		35.5	40	34.7
Impact to net income		$ 19.3	$ 4.5	$ 0.3
Low-Income Housing Project Investments | Predecessor Company
Investment [Line Items]
Pass through activity	(2.1)
Write downs	(0.5)
Tax benefits	0.9
Tax credits, net	3.1
Impact to net income	$ 1.4

Mortgage Loans - Additional Inf

Mortgage Loans - Additional Information (Details) - Commercial Mortgage Loans	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	100.00%	100.00%
First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unamortized premium balance	$ 130,600,000	$ 177,100,000
Non-performing loans	$ 0	$ 0
California | Geographic Concentration Risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	26.30%
Texas | Geographic Concentration Risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	11.20%
Washington | Geographic Concentration Risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	6.90%
Los Angeles | Geographic Concentration Risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	41.90%
Lower risk
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	66.90%	69.80%
Lower risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	65.00%
Debt service coverage ratio, greater or less than	1.50
Medium risk
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	24.80%	22.80%
Medium risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	65.00%
Debt service coverage ratio, greater or less than	1.50
Medium risk | First Mortgage Lien | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	65.00%
Medium risk | First Mortgage Lien | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	80.00%
Higher risk
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Concentration risk percentage	8.30%	7.40%
Higher risk | First Mortgage Lien
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	80.00%
Debt service coverage ratio, greater or less than	1.50
Higher risk | First Mortgage Lien | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	65.00%
Higher risk | First Mortgage Lien | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan to value ratio	80.00%

Mortgage Loans - Mortgage Loans

Mortgage Loans - Mortgage Loans by Risk (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Loans specifically evaluated for impairment	$ 0	$ 4,800,000
Other	3,600,000	2,000,000
Mortgage loans, net	6,485,100,000	6,241,200,000
Reserve amounts held for loans evaluated for impairment	$ 0	$ 0
Commercial Mortgage Loans
Concentration Risk [Line Items]
Concentration risk percentage	100.00%	100.00%
Mortgage loans	$ 2,937,500,000	$ 2,130,000,000
Commercial Mortgage Loans | Lower risk
Concentration Risk [Line Items]
Concentration risk percentage	66.90%	69.80%
Mortgage loans	$ 1,965,200,000	$ 1,486,100,000
Commercial Mortgage Loans | Medium risk
Concentration Risk [Line Items]
Concentration risk percentage	24.80%	22.80%
Mortgage loans	$ 727,600,000	$ 486,300,000
Commercial Mortgage Loans | Higher risk
Concentration Risk [Line Items]
Concentration risk percentage	8.30%	7.40%
Mortgage loans	$ 244,700,000	$ 157,600,000
Purchase GAAP Accounting Loan | Commercial Mortgage Loans
Concentration Risk [Line Items]
Concentration risk percentage	100.00%	100.00%
Mortgage loans	$ 3,544,000,000	$ 4,104,400,000
Purchase GAAP Accounting Loan | Commercial Mortgage Loans | Lower risk
Concentration Risk [Line Items]
Concentration risk percentage	73.00%	70.70%
Mortgage loans	$ 2,586,900,000	$ 2,899,200,000
Purchase GAAP Accounting Loan | Commercial Mortgage Loans | Medium risk
Concentration Risk [Line Items]
Concentration risk percentage	21.00%	21.80%
Mortgage loans	$ 745,900,000	$ 896,800,000
Purchase GAAP Accounting Loan | Commercial Mortgage Loans | Higher risk
Concentration Risk [Line Items]
Concentration risk percentage	6.00%	7.50%
Mortgage loans	$ 211,200,000	$ 308,400,000

Mortgage Loans - Allowance for

Mortgage Loans - Allowance for Mortgage Loan Losses (Details) - First Mortgage Lien - Commercial Mortgage Loans - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Feb. 01, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balance	$ 0	$ 0.7	$ 1	$ 0.7	$ 0
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance at beginning of period		0	1	0.7
Provision for specific loans		0	0.6	0
Provision for loans not specifically identified		0.7	0.5	0.3
Charge-offs		0	(0.6)	0
Allowance at end of period	0	0.7	$ 1.5	1
Predecessor Company
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance balance	8.1	8.1		8.1
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance at beginning of period		8.1		$ 8.1
Provision for specific loans	0
Provision for loans not specifically identified	0
Charge-offs	0
Allowance at end of period	$ 8.1	$ 8.1

Derivative Instruments - Fair V

Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional amount	$ 9,974.6	$ 8,372.6
Fair Value, derivative asset	245.9	339.1
Fair Value, derivative liability	875.9	806
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	1,717.9	1,654.3
Fair Value, derivative asset	116.9	77
Fair Value, derivative liability	3.1	7
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	8,256.7	6,718.3
Fair Value, derivative asset	129	262.1
Fair Value, derivative liability	872.8	799
Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	916.6	968.1
Fair Value, derivative asset	1.5	1.5
Fair Value, derivative liability	0	1.4
Foreign currency swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	801.3	686.2
Fair Value, derivative asset	115.4	75.5
Fair Value, derivative liability	3.1	5.6
Index options | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	8,231.5	6,696.1
Fair Value, derivative asset	61.8	261.9
Fair Value, derivative liability	0.6	1.5
Embedded derivatives – Indexed products | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	0	0
Fair Value, derivative asset	0	0
Fair Value, derivative liability	871.5	797.5
Embedded derivative – Closed Block | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	0	0
Fair Value, derivative asset	67	0
Fair Value, derivative liability	0	0
Other derivatives | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount	25.2	22.2
Fair Value, derivative asset	0.2	0.2
Fair Value, derivative liability	$ 0.7	$ 0

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Initial margin, centrally-cleared derivatives		$ 21.3	$ 33.5
Net gains expected to be reclassified from AOCI into net income in next 12 months		$ 6
Maximum term exposure is hedged		22 years
Loss on Cash Flow Hedge Ineffectiveness	$ 1.9	$ 0.3
Gain on Cash Flow Hedge Ineffectiveness			$ 1.6

Derivative Instruments - Potent

Derivative Instruments - Potential Effect of Netting Arrangements, Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	$ 178.9	$ 339.1
Financial Instruments	(4.4)	(8.5)
Cash Collateral Received	(171.7)	(327.6)
Net Amount	2.8	3
A
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	18.1	46.1
Financial Instruments	(2.6)	(4.2)
Cash Collateral Received	(15.5)	(41.9)
Net Amount	0	0
B
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	60.1	63.6
Financial Instruments	(0.6)	(1.4)
Cash Collateral Received	(59.5)	(62.2)
Net Amount	0	0
C
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	18.7	13.2
Financial Instruments	0	0
Cash Collateral Received	(18.7)	(13.2)
Net Amount	0	0
E
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	11.8	21.3
Financial Instruments	0	0
Cash Collateral Received	(11.8)	(21.3)
Net Amount	0	0
F
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets		31.6
Financial Instruments		(1.3)
Cash Collateral Received		(29)
Net Amount		1.3
G
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	15.9	30.2
Financial Instruments	0	0
Cash Collateral Received	(15.6)	(30.2)
Net Amount	0.3	0
H
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	11	51.9
Financial Instruments	(0.5)	(1)
Cash Collateral Received	(10.5)	(50.9)
Net Amount	0	0
I
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	16.3	34.6
Financial Instruments	0	0
Cash Collateral Received	(16)	(32.9)
Net Amount	0.3	1.7
J
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets		42.7
Financial Instruments		0
Cash Collateral Received		(42.7)
Net Amount		0
Other
Offsetting Assets [Line Items]
Fair Value Presented in the Balance Sheets	27	3.9
Financial Instruments	(0.7)	(0.6)
Cash Collateral Received	(24.1)	(3.3)
Net Amount	$ 2.2	$ 0

Derivative Instruments - Pote_2

Derivative Instruments - Potential Effect of Netting Arrangements, Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets	$ 4.4	$ 8.5
Financial Instruments	(4.4)	(8.5)
Cash Collateral Posted	0	0
Net Amount	0	0
A
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets	2.6	4.2
Financial Instruments	(2.6)	(4.2)
Cash Collateral Posted	0	0
Net Amount	0	0
B
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets	0.6	1.4
Financial Instruments	(0.6)	(1.4)
Cash Collateral Posted	0	0
Net Amount	0	0
F
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets		1.3
Financial Instruments		(1.3)
Cash Collateral Posted		0
Net Amount		0
H
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets	0.5
Financial Instruments	(0.5)
Cash Collateral Posted	0
Net Amount	0
Other
Offsetting Liabilities [Line Items]
Fair Value Presented in the Balance Sheets	0.7	1.6
Financial Instruments	(0.7)	(1.6)
Cash Collateral Posted	0	0
Net Amount	$ 0	$ 0

Derivative Instruments - Gain (

Derivative Instruments - Gain (Loss) Recognized in OCI on Derivatives (Details) - Designated as Hedging Instrument - Cash Flow Hedge - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI		$ 43.6	$ 43.2	$ (67.5)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI		(18.9)	(3.3)	(2.9)
Foreign currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI		$ 62.5	$ 46.5	$ (64.6)
Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI	$ 40.4
Predecessor Company | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI	11.3
Predecessor Company | Foreign currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in OCI	$ 29.1

Derivative Instruments - Effect

Derivative Instruments - Effects of Derivatives Not Designated as Hedges (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		$ (21.1)	$ (42.9)	$ 52
Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	$ 0
Index options
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		84.3	(141.1)	170
Index options | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	(33.2)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		(0.3)	3.2	0.9
Interest rate swaps | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	3.7
Total return swaps
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		(22.8)	(47.4)	(4.3)
Total return swaps | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	0
Futures
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		0.8	(13.1)	3.7
Futures | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	0
Embedded derivatives – Indexed products
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		(84.5)	88.5	(118.6)
Embedded derivatives – Indexed products | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	29.4
Embedded derivative – Closed Block
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		0	67	0
Embedded derivative – Closed Block | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	0
Other derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income		$ 1.4	$ 0	$ 0.3
Other derivatives | Predecessor Company
Derivative Instruments, Gain (Loss) [Line Items]
Net realized gains (losses) on derivatives recognized in income	$ 0.1

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information About Instruments Measured at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jul. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	$ 30,179.3		$ 30,281.3
Fixed maturities, trading	1,095.8		0
Marketable equity securities, at fair value	97.7		755.7
Derivatives, at fair value	178.9		339.1
Separate account assets	904.3		978.1
Embedded derivatives – Indexed products	875.9		806
Mortgage loans	6,485.1		6,241.2
Investments in limited partnerships	130.1		173
Cash and cash equivalents	227.3		347.5	$ 326.2
Deposit asset	5,920.4	$ 6,072.6
Funds held under deposit contracts	37,404.5		35,345.9
Funds withheld liability	5,589.9	$ 5,700	0
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents			347.5
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents			0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents			0
Corporate Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	23,691.4		23,932.2
Residential Mortgage Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	2,381.2		2,472.8
Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	858.4		795.7
Collateralized Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	912.6		1,146.6
Other Debt Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	1,174		719.4
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	227.3		347.5
Deposit asset	5,920.4
Carrying Amount | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	30,179.3		30,281.3
Fixed maturities, trading	1,095.8
Marketable equity securities, at fair value	97.7		755.7
Derivatives, at fair value	178.9		339.1
Total investments carried at fair value	31,551.7		31,376.1
Embedded derivative – Closed Block	67
Separate account assets	904.3		978.1
Total assets at fair value	32,523		32,354.2
Carrying Amount | US Government Agencies Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	432.8		422.2
Carrying Amount | US States and Political Subdivisions Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	728.9		792.4
Carrying Amount | Corporate Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	23,691.4		23,932.2
Carrying Amount | Residential Mortgage Backed Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	2,381.2		2,472.8
Carrying Amount | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	858.4		795.7
Carrying Amount | Collateralized Debt Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	912.6		1,146.6
Carrying Amount | Other Debt Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	1,174		719.4
Carrying Amount | Index options | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	61.8		261.9
Carrying Amount | Foreign currency swaps | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	115.4		75.5
Carrying Amount | Other derivatives | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	1.7		1.7
Carrying Amount | Embedded derivatives – Indexed products | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivatives – Indexed products	871.5		797.5
Carrying Amount | Mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	6,485.1		6,241.2
Carrying Amount | Tax Credit Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in limited partnerships	130.1		173
Carrying Amount | Funds held under deposit contracts: Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	22,797.7		20,128.3
Carrying Amount | Funds held under deposit contracts: Income annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	474.6
Funds withheld liability	5,656.9
Carrying Amount | Funds held under deposit contracts: Closed block
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	6,594.4		7,202.5
Carrying Amount | Insurance contracts and embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	8,407.6		8,015.1
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	227.3		347.5
Deposit asset	6,750.4
Fair Value | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	227.3
Deposit asset	0
Fair Value | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0
Deposit asset	0
Fair Value | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0
Deposit asset	6,750.4
Fair Value | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	30,179.3		30,281.3
Fixed maturities, trading	1,095.8
Marketable equity securities, at fair value	97.7		755.7
Derivatives, at fair value	178.9		339.1
Total investments carried at fair value	31,551.7		31,376.1
Embedded derivative – Closed Block	67
Separate account assets	904.3		978.1
Total assets at fair value	32,523		32,354.2
Fair Value | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fixed maturities, trading	0
Marketable equity securities, at fair value	85.2		722.6
Derivatives, at fair value	0.2		0.2
Total investments carried at fair value	85.4		722.8
Embedded derivative – Closed Block	0
Separate account assets	904.3		978.1
Total assets at fair value	989.7		1,700.9
Fair Value | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	29,842.9		30,038.9
Fixed maturities, trading	1,095.8
Marketable equity securities, at fair value	12		26.8
Derivatives, at fair value	178.7		299.4
Total investments carried at fair value	31,129.4		30,365.1
Embedded derivative – Closed Block	0
Separate account assets	0		0
Total assets at fair value	31,129.4		30,365.1
Fair Value | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	336.4		242.4
Fixed maturities, trading	0
Marketable equity securities, at fair value	0.5		6.3
Derivatives, at fair value	0		39.5
Total investments carried at fair value	336.9		288.2
Embedded derivative – Closed Block	67
Separate account assets			0
Total assets at fair value	403.9		288.2
Fair Value | US Government Agencies Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	432.8		422.2
Fair Value | US Government Agencies Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | US Government Agencies Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	432.8		422.2
Fair Value | US Government Agencies Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | US States and Political Subdivisions Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	728.9		792.4
Fair Value | US States and Political Subdivisions Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | US States and Political Subdivisions Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	728.9		792.4
Fair Value | US States and Political Subdivisions Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Corporate Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	23,691.4		23,932.2
Fair Value | Corporate Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Corporate Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	23,405.8		23,731.4
Fair Value | Corporate Debt Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	285.6		200.8
Fair Value | Residential Mortgage Backed Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	2,381.2		2,472.8
Fair Value | Residential Mortgage Backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Residential Mortgage Backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	2,381.2		2,472.8
Fair Value | Residential Mortgage Backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	858.4		795.7
Fair Value | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	858.4		795.6
Fair Value | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0.1
Fair Value | Collateralized Debt Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	912.6		1,146.6
Fair Value | Collateralized Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Collateralized Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	912.6		1,146.6
Fair Value | Collateralized Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Other Debt Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	1,174		719.4
Fair Value | Other Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0		0
Fair Value | Other Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	1,123.2		677.9
Fair Value | Other Debt Obligations | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	50.8		41.5
Fair Value | Index options | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	61.8		261.9
Fair Value | Index options | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0		0
Fair Value | Index options | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	61.8		222.4
Fair Value | Index options | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0		39.5
Fair Value | Foreign currency swaps | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	115.4		75.5
Fair Value | Foreign currency swaps | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0		0
Fair Value | Foreign currency swaps | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	115.4		75.5
Fair Value | Foreign currency swaps | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0		0
Fair Value | Other derivatives | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	1.7		1.7
Fair Value | Other derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0.2		0.2
Fair Value | Other derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	1.5		1.5
Fair Value | Other derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, at fair value	0		0
Fair Value | Embedded derivatives – Indexed products | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivatives – Indexed products	871.5		797.5
Fair Value | Embedded derivatives – Indexed products | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivatives – Indexed products	0		0
Fair Value | Embedded derivatives – Indexed products | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivatives – Indexed products	0		0
Fair Value | Embedded derivatives – Indexed products | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivatives – Indexed products	871.5		797.5
Fair Value | Mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	6,349		6,180.8
Fair Value | Mortgage loans | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	0		0
Fair Value | Mortgage loans | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	0		0
Fair Value | Mortgage loans | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans	6,349		6,180.8
Fair Value | Tax Credit Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in limited partnerships	122		135.1
Fair Value | Tax Credit Investments | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in limited partnerships	0		0
Fair Value | Tax Credit Investments | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in limited partnerships	0		0
Fair Value | Tax Credit Investments | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in limited partnerships	122		135.1
Fair Value | Funds held under deposit contracts: Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	21,946.8		19,943.3
Fair Value | Funds held under deposit contracts: Deferred annuities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0		0
Fair Value | Funds held under deposit contracts: Deferred annuities | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0		0
Fair Value | Funds held under deposit contracts: Deferred annuities | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	21,946.8		19,943.3
Fair Value | Funds held under deposit contracts: Income annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	470.4
Funds withheld liability	6,084.5
Fair Value | Funds held under deposit contracts: Income annuities | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0
Funds withheld liability	0
Fair Value | Funds held under deposit contracts: Income annuities | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0
Funds withheld liability	0
Fair Value | Funds held under deposit contracts: Income annuities | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	470.4
Funds withheld liability	6,084.5
Fair Value | Funds held under deposit contracts: Closed block
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	6,750.4		8,080.5
Fair Value | Funds held under deposit contracts: Closed block | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0		0
Fair Value | Funds held under deposit contracts: Closed block | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	0		0
Fair Value | Funds held under deposit contracts: Closed block | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Funds held under deposit contracts	6,750.4		8,080.5
Liability | Fair Value | Tax Credit Investments | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Future investment contributions	$ 8.4		$ 32.8

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturity securities, percentage of pricing services	94.40%	94.40%
Trading securities, at fair value	$ 1,095.8	$ 0
Increase to the fair value of embedded derivative	36.4
Decrease to the fair value of embedded derivative		28.9
Private Placement | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	$ 1,576.9	$ 1,509
Fixed maturity securities, as a percentage	5.00%	5.00%
Private Placement | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities, at fair value	$ 1,303.6	$ 1,325.9
Fixed maturity securities, as a percentage	82.70%	87.90%

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Rollforward of Financial Instruments Significant Unobcervable Inputs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	$ 288.2	$ 78.4
Asset, purchases	38.5	111.5
Asset, sales	0	0
Asset, transfers, net	33.9	86
Other period increase (decrease)	(4.7)	(24.2)
Gain (loss) included in earnings	67.9	26
Gain (loss) included in other comprehensive income (loss)	(18.2)	12.6
Net realized gain (loss)	(1.7)	(2.1)
Ending balance at recurring basis, asset value	403.9	288.2
Fixed maturities – AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	242.4	65.5
Asset, purchases	38.5	87.9
Asset, sales	0	0
Asset, transfers, net	78.4	85.9
Other period increase (decrease)	(4.7)	(9.1)
Gain (loss) included in earnings	0	0
Gain (loss) included in other comprehensive income (loss)	(18.2)	12.3
Net realized gain (loss)	0	(0.1)
Ending balance at recurring basis, asset value	336.4	242.4
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Asset transfers into level 3	81.9	86
Transfers out of level 3	(48)	0
Marketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	6.3	5.9
Asset, purchases	0	0
Asset, sales	0	0
Asset, transfers, net	(5.8)	0.1
Other period increase (decrease)	0	0
Gain (loss) included in earnings	0	0
Gain (loss) included in other comprehensive income (loss)	0	0.3
Net realized gain (loss)	0	0
Ending balance at recurring basis, asset value	0.5	6.3
Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance of net derivative asset (liability)	39.5	7
Derivative asset (liability), issues		23.6
Derivative asset (liability), settlements		0
Derivative asset (liability), transfers, net		0
Derivative asset (liability), other period increase (decrease)		(15.1)
Derivative asset (liability), gain (loss) included in earnings		26
Derivative asset (liability), gain (loss) included in OCI		0
Derivative asset (liability), net realized gain (loss)		(2)
Ending Balance of net derivative asset (liability)		39.5
Corporate Debt Securities | Fixed maturities – AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	200.8	57
Asset, purchases	26.4	87.9
Asset, sales	0	0
Asset, transfers, net	78.4	57.2
Other period increase (decrease)	(4.7)	(9)
Gain (loss) included in earnings	0	0
Gain (loss) included in other comprehensive income (loss)	(15.3)	7.8
Net realized gain (loss)	0	(0.1)
Ending balance at recurring basis, asset value	285.6	200.8
Commercial Mortgage Backed Securities | Fixed maturities – AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	0.1	0.9
Asset, purchases	0	0
Asset, sales	0	0
Asset, transfers, net	0	0
Other period increase (decrease)	(0.1)	(0.8)
Gain (loss) included in earnings	0	0
Gain (loss) included in other comprehensive income (loss)	0	0
Net realized gain (loss)	0	0
Ending balance at recurring basis, asset value	0	0.1
Other Debt Obligations | Fixed maturities – AFS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at recurring basis, asset value	41.5	7.6
Asset, purchases	12.1	0
Asset, sales	0	0
Asset, transfers, net	0	28.7
Other period increase (decrease)	0.1	0.7
Gain (loss) included in earnings	0	0
Gain (loss) included in other comprehensive income (loss)	(2.9)	4.5
Net realized gain (loss)	0	0
Ending balance at recurring basis, asset value	50.8	41.5
Index options | Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance of net derivative asset (liability)	39.5	7
Derivative asset (liability), issues	0	22.7
Derivative asset (liability), settlements	0	0
Derivative asset (liability), transfers, net	(38.7)	0
Derivative asset (liability), other period increase (decrease)	0	(14.5)
Derivative asset (liability), gain (loss) included in earnings	0.9	26
Derivative asset (liability), gain (loss) included in OCI	0	0
Derivative asset (liability), net realized gain (loss)	(1.7)	(1.7)
Ending Balance of net derivative asset (liability)	0	39.5
Other derivatives | Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance of net derivative asset (liability)	0	0
Derivative asset (liability), issues		0.9
Derivative asset (liability), settlements		0
Derivative asset (liability), transfers, net		0
Derivative asset (liability), other period increase (decrease)		(0.6)
Derivative asset (liability), gain (loss) included in earnings		0
Derivative asset (liability), gain (loss) included in OCI		0
Derivative asset (liability), net realized gain (loss)		(0.3)
Ending Balance of net derivative asset (liability)		0
Embedded derivative – Closed Block
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance of net derivative asset (liability)	0
Derivative asset (liability), issues	0
Derivative asset (liability), settlements	0
Derivative asset (liability), transfers, net	0
Derivative asset (liability), other period increase (decrease)	0
Derivative asset (liability), gain (loss) included in earnings	67
Derivative asset (liability), gain (loss) included in OCI	0
Derivative asset (liability), net realized gain (loss)	0
Ending Balance of net derivative asset (liability)	67	0
Embedded derivatives – Indexed products
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance of net derivative asset (liability)	(797.5)	(532.4)
Derivative asset (liability), issues	(179.4)	(162.6)
Derivative asset (liability), settlements	(16.9)	(8)
Derivative asset (liability), transfers, net	0	0
Derivative asset (liability), other period increase (decrease)	0	8.1
Derivative asset (liability), gain (loss) included in earnings	88.5	(118.6)
Derivative asset (liability), gain (loss) included in OCI	0	0
Derivative asset (liability), net realized gain (loss)	0	0
Ending Balance of net derivative asset (liability)	$ (871.5)	$ (797.5)

Deferred Policy Acquisition C_3

Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA) - Reconciliation of DAC (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Unamortized balance at beginning of period		$ 0	$ 407.2	$ 202.8
Deferral of acquisition costs		215.4	260.6	239.9
Adjustments for realized (gains) losses		(1.6)	(1.5)	(4.6)
Amortization – excluding unlocking		(9.9)	(39.7)	(30.9)
Amortization — impact of unlocking		(1.1)	(4.1)	0
Adjustment for Closed Block		0	(12.6)	0
Unamortized balance at end of period	$ 0	202.8	609.9	407.2
Accumulated effect of net unrealized (gains) losses		(3.4)	34.4	(21)
Balance at end of period		199.4	$ 644.3	$ 386.2
Predecessor Company
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Unamortized balance at beginning of period	677.5	$ 688.1
Deferral of acquisition costs	19.6
Adjustments for realized (gains) losses	(0.4)
Amortization – excluding unlocking	(8.4)
Amortization — impact of unlocking	(0.2)
Adjustment for Closed Block	0
Unamortized balance at end of period	688.1
Accumulated effect of net unrealized (gains) losses	(41)
Balance at end of period	$ 647.1

Deferred Policy Acquisition C_4

Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA) - Reconciliation of VOBA (Details) - USD ($) $ in Millions	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Movement in Present Value of Future Insurance Profits [Roll Forward]
Unamortized balance at beginning of period	$ 457.6	$ 358.1	$ 413.4
Adjustments related to realized (gains) losses	4.5	10.1	(11.9)
Amortization – excluding unlocking	(40.7)	(42.8)	(41.8)
Amortization — impact of unlocking	(8)	(5.1)	(1.6)
Unamortized balance at end of period	413.4	320.3	358.1
Accumulated effect of net unrealized (gains) losses	(16.1)	58.4	(48.1)
Balance at end of period	$ 397.3	$ 378.7	$ 310

Deferred Policy Acquisition C_5

Deferred Policy Acquisition Costs (DAC) and Value of Business Acquired (VOBA) - Estimated Future Amortization Expense (Details) $ in Millions	Dec. 31, 2018USD ($)
Insurance [Abstract]
2019	$ 40.3
2020	35
2021	29.8
2022	24.3
2023	$ 18.2

Liability for Unpaid Claims a_3

Liability for Unpaid Claims and Claim Adjustment Expenses - Unpaid Claims and Claims Adjustment Expenses (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period			$ 196.6
Future policy benefits			46.7
Paid related to insured events of:
Balance, end of period			203	$ 196.6
Medical Stop-Loss
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period		$ 113.1	153.1	114.6
Future policy benefits	$ 3.4	7.7	6.4	12.4
Net balance, beginning of period		109.7	140.7	106.9
Incurred related to insured events of:
The current year		351.9	502.3	460.6
Prior years		(5.2)	(2.7)	7.5
Total incurred		346.7	499.6	468.1
Paid related to insured events of:
The current year		276.7	370.1	331.2
Prior years		72.8	127.2	103.1
Total paid		349.5	497.3	434.3
Net balance, end of period	109.7	106.9	143	140.7
Balance, end of period	113.1	114.6	149.4	153.1
Group Life and DI
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period		122.2	184.2	149.9
Future policy benefits	76.7	48.4	40.3	41.9
Net balance, beginning of period		45.5	142.3	101.5
Incurred related to insured events of:
The current year		122.6	199.7	150.4
Prior years		5.7	(2.2)	2.7
Total incurred		128.3	197.5	153.1
Paid related to insured events of:
The current year		52.5	106.2	79.1
Prior years		19.8	43.9	33.2
Total paid		72.3	150.1	112.3
Net balance, end of period	45.5	101.5	189.7	142.3
Balance, end of period	122.2	149.9	230	184.2
Other
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period		27.2	29.6	33
Future policy benefits	3.8	6.7	4.5	4.7
Net balance, beginning of period		23.4	24.9	26.3
Incurred related to insured events of:
The current year		99.3	118.1	111
Prior years		4.8	3.8	(0.1)
Total incurred		104.1	121.9	110.9
Paid related to insured events of:
The current year		85.4	93.1	93.1
Prior years		15.8	21.2	19.2
Total paid		101.2	114.3	112.3
Net balance, end of period	23.4	26.3	32.5	24.9
Balance, end of period	27.2	33	$ 37	$ 29.6
Predecessor Company | Medical Stop-Loss
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period	122.9	113.1
Future policy benefits	3.4				$ 3.6
Net balance, beginning of period	119.3	109.7
Incurred related to insured events of:
The current year	28.1
Prior years	(0.5)
Total incurred	27.6
Paid related to insured events of:
The current year	1.9
Prior years	35.3
Total paid	37.2
Net balance, end of period	109.7
Balance, end of period	113.1
Predecessor Company | Group Life and DI
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period	119.8	122.2
Future policy benefits	76.7				76.9
Net balance, beginning of period	42.9	45.5
Incurred related to insured events of:
The current year	6.8
Prior years	0.5
Total incurred	7.3
Paid related to insured events of:
The current year	0.2
Prior years	4.5
Total paid	4.7
Net balance, end of period	45.5
Balance, end of period	122.2
Predecessor Company | Other
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, beginning of period	24.5	27.2
Future policy benefits	3.8				$ 4.4
Net balance, beginning of period	20.1	$ 23.4
Incurred related to insured events of:
The current year	7.6
Prior years	2.5
Total incurred	10.1
Paid related to insured events of:
The current year	1.5
Prior years	5.3
Total paid	6.8
Net balance, end of period	23.4
Balance, end of period	$ 27.2
Minimum
Paid related to insured events of:
Reinsurance rates of long-term DI business			45.00%
Maximum
Paid related to insured events of:
Reinsurance rates of long-term DI business			90.00%

Liability for Unpaid Claims a_4

Liability for Unpaid Claims and Claim Adjustment Expenses - Liabilities for Unpaid Claims, Net of Reinsurance (Details) $ in Millions	Dec. 31, 2018USD ($)claim	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Total liabilities for unpaid claims, net of reinsurance	$ 356.3
Medical Stop-Loss
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	968.9
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	825.9
Short duration contracts, Total liabilities for unpaid claims, net of reinsurance	143
Short duration contracts, Related IBNR Reserves	113.9
Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	640.4
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	433.6
Short duration contracts, Liabilities for unpaid claims prior to 2016, net of reinsurance	2.4
Short duration contracts, Total liabilities for unpaid claims, net of reinsurance	209.2
Short duration contracts, Related IBNR Reserves	55.6
2013 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	27.7	$ 27.5	$ 26.6	$ 23	$ 23.5	$ 21.9
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	23.2	22.8	22	21.3	19.7	$ 15.1
Short duration contracts, Related IBNR Reserves	$ 0
Short duration contracts, Cumulative Number of Reported Claims | claim	1,613
2014 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 58	56.1	56.2	42.1	41.3
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	42.3	39.8	35.9	32.6	$ 25.3
Short duration contracts, Related IBNR Reserves	$ 0
Short duration contracts, Cumulative Number of Reported Claims | claim	3,895
2015 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 90	90.8	92.1	73.6
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	69.8	66.1	57.1	$ 39.9
Short duration contracts, Related IBNR Reserves	$ 0
Short duration contracts, Cumulative Number of Reported Claims | claim	5,702
2016 | Medical Stop-Loss
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 466.6	460.6
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	455.8	331.2
Short duration contracts, Liabilities for unpaid claims prior to 2016, net of reinsurance	0
Short duration contracts, Related IBNR Reserves	$ 8.5
Short duration contracts, Cumulative Number of Reported Claims | claim	5,753
2016 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 103.5	105.6	106.5
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	80.1	74.2	$ 53.4
Short duration contracts, Related IBNR Reserves	$ 0
Short duration contracts, Cumulative Number of Reported Claims | claim	6,889
2017 | Medical Stop-Loss
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 502.3
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	370.1
Short duration contracts, Related IBNR Reserves	$ 105.4
Short duration contracts, Cumulative Number of Reported Claims | claim	3,079
2017 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 153.1	157.9
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	112	$ 80.7
Short duration contracts, Related IBNR Reserves	$ 5.1
Short duration contracts, Cumulative Number of Reported Claims | claim	9,714
2018 | Group Life and DI
Liability for Claims and Claims Adjustment Expense [Line Items]
Short duration contracts, Incurred Claims, Net of Reinsurance	$ 208.1
Short duration contracts, Cumulative Paid Claims, Net of Reinsurance	106.2
Short duration contracts, Related IBNR Reserves	$ 50.5
Short duration contracts, Cumulative Number of Reported Claims | claim	11,506

Liability for Unpaid Claims a_5

Liability for Unpaid Claims and Claim Adjustment Expenses - Reconciliation (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 31, 2016
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities for unpaid claims	$ 356.3
Total reinsurance recoverable on unpaid claims	46.7
Insurance lines other than short duration, net	32.9
Impact of discounting	(19.5)
Total gross liability for unpaid claims	416.4
Medical Stop-Loss
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities for unpaid claims	143
Total reinsurance recoverable on unpaid claims	6.4	$ 12.4	$ 7.7	$ 3.4
Group Life and DI
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities for unpaid claims	209.2
Total reinsurance recoverable on unpaid claims	40.3	$ 41.9	$ 48.4	$ 76.7
Other
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities for unpaid claims	4.1
Total reinsurance recoverable on unpaid claims	$ 0

Liability for Unpaid Claims a_6

Liability for Unpaid Claims and Claim Adjustment Expenses - Historical Payout Percentage (Details) - Group Life and DI	Dec. 31, 2018
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Year 1	49.70%
Year 2	17.80%
Year 3	6.70%
Year 4	4.50%
Year 5	3.50%
Year 6	1.50%

Stockholder's Equity (Details)

Stockholder's Equity (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		$ 3,946.1	$ 4,564.5	$ 4,026
Other comprehensive income (loss) before reclassifications, net of taxes		145.1		335.6
Net realized (gains) losses		9.4		(8.5)
Total provision (benefit) for income taxes		2.2		3.9
Total reclassifications from AOCI, net of taxes		(4)		(7.2)
Other comprehensive income (loss) after reclassifications		141.1		328.4
Adoption of new accounting standard			0	0
Stockholders' equity, ending balance	$ 3,946.1	4,026	3,710.8	4,564.5
Unrealized losses related to changes in exchange rates on fixed maturities			42
Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		(6.6)		0.1
Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		(9)		(2.7)
Net Unrealized Gains (Losses) on Available-for- sale Securities (4)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		0	642.7	137.6
Other comprehensive income (loss) before reclassifications, net of taxes		128.6	(959.8)	432.9
Net realized (gains) losses		13.8	18.6	(32.9)
Total provision (benefit) for income taxes		(4.8)	(3.9)	11.5
Total reclassifications from AOCI, net of taxes		9	14.7	(21.4)
Other comprehensive income (loss) after reclassifications		137.6	(945.1)	411.5
Adoption of new accounting standard			(114.3)	93.6
Stockholders' equity, ending balance	0	137.6	(416.7)	642.7
Other comprehensive income (loss) before reclassifications, tax		69.3	(255.1)	201.9
Net Unrealized Gains (Losses) on Available-for- sale Securities (4) | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
Net Unrealized Gains (Losses) on Available-for- sale Securities (4) | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
OTTI on Fixed Maturities not related to Credit Losses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		0	(0.3)	(0.2)
Other comprehensive income (loss) before reclassifications, net of taxes		(0.3)	(0.9)	(0.1)
Net realized (gains) losses		0.1	0	0
Total provision (benefit) for income taxes		0	0	0
Total reclassifications from AOCI, net of taxes		0.1	0	0
Other comprehensive income (loss) after reclassifications		(0.2)	(0.9)	(0.1)
Adoption of new accounting standard			0	0
Stockholders' equity, ending balance	0	(0.2)	(1.2)	(0.3)
Other comprehensive income (loss) before reclassifications, tax		(0.1)	(0.3)	0
OTTI on Fixed Maturities not related to Credit Losses | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
OTTI on Fixed Maturities not related to Credit Losses | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
Adjustment for DAC and VOBA
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		0	(63.6)	(14)
Other comprehensive income (loss) before reclassifications, net of taxes		(11.5)	157	(52.7)
Net realized (gains) losses		(3.7)	(9.4)	16.6
Total provision (benefit) for income taxes		1.2	2	(5.8)
Total reclassifications from AOCI, net of taxes		(2.5)	(7.4)	10.8
Other comprehensive income (loss) after reclassifications		(14)	149.6	(41.9)
Adoption of new accounting standard			0	(7.7)
Stockholders' equity, ending balance	0	(14)	86	(63.6)
Other comprehensive income (loss) before reclassifications, tax		(6.3)	41.8	(22.8)
Adjustment for DAC and VOBA | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
Adjustment for DAC and VOBA | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		0	0	0
Net Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		0	(27.7)	17.7
Other comprehensive income (loss) before reclassifications, net of taxes		28.3	34.1	(44.5)
Net realized (gains) losses		(0.8)	3.1	7.8
Total provision (benefit) for income taxes		5.8	(1.3)	(1.8)
Total reclassifications from AOCI, net of taxes		(10.6)	4.8	3.4
Other comprehensive income (loss) after reclassifications		17.7	38.9	(41.1)
Adoption of new accounting standard			0	(4.3)
Stockholders' equity, ending balance	0	17.7	11.2	(27.7)
Other comprehensive income (loss) before reclassifications, tax		15.3	9	(23)
Net Gains (Losses) on Cash Flow Hedges | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		(6.6)	(2)	0.1
Net Gains (Losses) on Cash Flow Hedges | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income		(9)	5	(2.7)
Accumulated Other Comprehensive Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance		0	551.1	141.1
Other comprehensive income (loss) before reclassifications, net of taxes			(769.6)
Net realized (gains) losses			12.3
Total provision (benefit) for income taxes			(3.2)
Total reclassifications from AOCI, net of taxes			12.1
Other comprehensive income (loss) after reclassifications			(757.5)
Adoption of new accounting standard			(114.3)	81.6
Stockholders' equity, ending balance	0	141.1	(320.7)	551.1
Other comprehensive income (loss) before reclassifications, tax		78.2	(204.6)	$ 156.1
Accumulated Other Comprehensive Income | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income			(2)
Accumulated Other Comprehensive Income | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income			$ 5
Predecessor Company
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	3,156.2	3,266.8
Other comprehensive income (loss) before reclassifications, net of taxes	113.1
Net realized (gains) losses	3.1
Total provision (benefit) for income taxes	(0.5)
Total reclassifications from AOCI, net of taxes	1
Other comprehensive income (loss) after reclassifications	114.1
Stockholders' equity, ending balance	3,266.8
Predecessor Company | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	(0.6)
Predecessor Company | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	(1)
Predecessor Company | Net Unrealized Gains (Losses) on Available-for- sale Securities (4)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	521.7	635
Other comprehensive income (loss) before reclassifications, net of taxes	111.6
Net realized (gains) losses	2.6
Total provision (benefit) for income taxes	(0.9)
Total reclassifications from AOCI, net of taxes	1.7
Other comprehensive income (loss) after reclassifications	113.3
Stockholders' equity, ending balance	635
Other comprehensive income (loss) before reclassifications, tax	60.1
Predecessor Company | Net Unrealized Gains (Losses) on Available-for- sale Securities (4) | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | Net Unrealized Gains (Losses) on Available-for- sale Securities (4) | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | OTTI on Fixed Maturities not related to Credit Losses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	(17.7)	(17.7)
Other comprehensive income (loss) before reclassifications, net of taxes	0
Net realized (gains) losses	0
Total provision (benefit) for income taxes	0
Total reclassifications from AOCI, net of taxes	0
Other comprehensive income (loss) after reclassifications	0
Stockholders' equity, ending balance	(17.7)
Other comprehensive income (loss) before reclassifications, tax	0
Predecessor Company | OTTI on Fixed Maturities not related to Credit Losses | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | OTTI on Fixed Maturities not related to Credit Losses | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | Adjustment for DAC and VOBA
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	(28.1)	(52.5)
Other comprehensive income (loss) before reclassifications, net of taxes	(24.7)
Net realized (gains) losses	0.5
Total provision (benefit) for income taxes	(0.2)
Total reclassifications from AOCI, net of taxes	0.3
Other comprehensive income (loss) after reclassifications	(24.4)
Stockholders' equity, ending balance	(52.5)
Other comprehensive income (loss) before reclassifications, tax	(13.3)
Predecessor Company | Adjustment for DAC and VOBA | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | Adjustment for DAC and VOBA | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	0
Predecessor Company | Net Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	42.2	67.4
Other comprehensive income (loss) before reclassifications, net of taxes	26.2
Net realized (gains) losses	0
Total provision (benefit) for income taxes	0.6
Total reclassifications from AOCI, net of taxes	(1)
Other comprehensive income (loss) after reclassifications	25.2
Stockholders' equity, ending balance	67.4
Other comprehensive income (loss) before reclassifications, tax	14.2
Predecessor Company | Net Gains (Losses) on Cash Flow Hedges | Interest rate swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	(0.6)
Predecessor Company | Net Gains (Losses) on Cash Flow Hedges | Foreign currency swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassifications recorded in net investment income	(1)
Predecessor Company | Accumulated Other Comprehensive Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	518.1	$ 632.2
Stockholders' equity, ending balance	632.2
Other comprehensive income (loss) before reclassifications, tax	$ 61

Commitments and Contingencies -

Commitments and Contingencies - Future Minimum Lease Commitments (Details) $ in Millions	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2018	$ 10.2
2019	9.3
2020	5.1
2021	2.9
2022	2.3
Thereafter	3.2
Total	$ 33

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($)	Dec. 12, 2014	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Unfunded mortgage loan and unsettled private placement securities commitments		$ 65,900,000	$ 53,200,000
Line of credit | Surplus Note
Debt Instrument [Line Items]
Debt instrument term	25 years
Initial principal balance	$ 0
Maximum borrowing capacity		100,700,000
Borrowings since inception		$ 0

Segment Information (Details)

Segment Information (Details) $ in Millions	1 Months Ended	3 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016USD ($)	Sep. 30, 2018segment	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)segmentdivision	Dec. 31, 2017USD ($)
Segment Reporting [Abstract]
Number of operating divisions | division				3
Number of reportable segments | segment		3		4
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income			$ 50.9	$ 163.5	$ 116.2
Excluded realized gains (losses)			(12.5)	(70.4)	44.1
Amortization of intangible assets			(74.3)	(82.8)	(81.1)
Closed Block results			(15.8)	(132.8)	35.5
Income (loss) from operations before income taxes			(51.7)	(122.5)	114.7
Benefits
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income			35.8	52.4	34.3
Retirement
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income			60.8	111.7	106.2
Individual Life
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income			17.1	16	19.9
Other
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income			$ (62.8)	$ (16.6)	$ (44.2)
Predecessor Company
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income	$ 15.9
Excluded realized gains (losses)	(4)
Amortization of intangible assets	0
Closed Block results	(24.7)
Income (loss) from operations before income taxes	(12.8)
Predecessor Company | Benefits
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income	7.9
Predecessor Company | Retirement
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income	10.3
Predecessor Company | Individual Life
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income	0.5
Predecessor Company | Other
Segment Reporting Information [Line Items]
Total segment adjusted pre-tax income	$ (2.8)

Segment Information - Segment R

Segment Information - Segment Revenue (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total segment adjusted revenue		$ 1,668.6	$ 2,349.6	$ 2,078
Add: Excluded realized gains (losses)		(12.5)	(70.4)	44.1
Add: Closed Block revenue		272.5	2	336.1
Total revenues		1,928.6	2,281.2	2,458.2
Benefits
Segment Reporting Information [Line Items]
Total segment adjusted revenue		711.8	1,014.4	898
Retirement
Segment Reporting Information [Line Items]
Total segment adjusted revenue		573.1	782.8	708.9
Individual Life
Segment Reporting Information [Line Items]
Total segment adjusted revenue		420.8	569.3	513
Other
Segment Reporting Information [Line Items]
Total segment adjusted revenue		$ (37.1)	$ (16.9)	$ (41.9)
Predecessor Company
Segment Reporting Information [Line Items]
Total segment adjusted revenue	$ 158.9
Add: Excluded realized gains (losses)	(4)
Add: Closed Block revenue	7.4
Total revenues	162.3
Predecessor Company | Benefits
Segment Reporting Information [Line Items]
Total segment adjusted revenue	61.3
Predecessor Company | Retirement
Segment Reporting Information [Line Items]
Total segment adjusted revenue	58.3
Predecessor Company | Individual Life
Segment Reporting Information [Line Items]
Total segment adjusted revenue	41.7
Predecessor Company | Other
Segment Reporting Information [Line Items]
Total segment adjusted revenue	$ (2.4)

Segment Information - Segment A

Segment Information - Segment Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total segment assets	$ 36,908.7	$ 35,040.8
Add: Closed Block assets	12,052.8	7,513.4
Total assets	48,961.5	42,554.2
Benefits
Segment Reporting Information [Line Items]
Total segment assets	1,468.4	1,467.3
Retirement
Segment Reporting Information [Line Items]
Total segment assets	25,077.7	23,968.5
Individual Life
Segment Reporting Information [Line Items]
Total segment assets	8,005.9	7,836
Other
Segment Reporting Information [Line Items]
Total segment assets	$ 2,356.7	$ 1,769

Segment Information - Segment S

Segment Information - Segment Supplementary Insurance Information (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Premium Revenue		$ 717.5	$ 1,013.3	$ 899.5
Closed Block, Premium Revenue		0	0	0
Total premiums		717.5	1,013.3	899.5
Net Investment Income		812.5	1,082.4	980.8
Closed Block, Net Investment Income		288.8	123.4	303.3
Total Net Investment Income		1,101.3	1,205.8	1,284.1
Benefits, claims, and interest credited		1,169.1	1,624.9	1,452.6
Closed Block, Benefits, Claims and Interest Credited		267.5	109.8	279.7
Total Benefits, Claims, and Interest Credited		1,436.6	1,734.7	1,732.3
Amortization of DAC and VOBA		59	90.3	72.3
Closed Block, Amortization Of DAC and VOBA		0.7	1.4	2
Total Amortization of DAC and VOBA		59.7	91.7	74.3
Underwriting and operating expenses		389.6	470.9	436.9
Closed Block, Other Underwriting and Operating Expenses		17	21.9	15.6
Total Other Underwriting and Operating Expenses		406.6	492.8	452.5
Balance Sheet
DAC and VOBA			1,023	679.9
Add: Closed Block, DAC and VOBA			0	16.3
Total DAC and VOBA			1,023	696.2
Future Policy Benefits, Losses, Claims, and Loss Expense			31,536.4	28,916.8
Add: Closed Block, Future Policy Benefits, Losses, Claims, and Loss Expense			6,594.3	7,124.5
Total Future Policy Benefits, Losses, Claims, and Loss Expense			38,130.7	36,041.3
Other Policyholders' Funds			149.3	113.9
Add: Closed Block, Other Policyholders' Funds			0	4
Total Other Policyholders' Funds			149.3	117.9
Benefits
Segment Reporting Information [Line Items]
Premium Revenue		686.7	979.8	867.4
Net Investment Income		18.8	30.3	25.7
Benefits, claims, and interest credited		497.6	719.8	640.2
Amortization of DAC and VOBA		0.6	5.6	2.8
Underwriting and operating expenses		177.8	236.6	220.7
Balance Sheet
DAC and VOBA			9.5	7.7
Future Policy Benefits, Losses, Claims, and Loss Expense			386.4	344.7
Other Policyholders' Funds			32.7	29.3
Retirement
Segment Reporting Information [Line Items]
Premium Revenue		0	0	0
Net Investment Income		579.5	762.2	698.7
Benefits, claims, and interest credited		357.6	470.1	426.8
Amortization of DAC and VOBA		56.5	76.3	60.8
Underwriting and operating expenses		98.2	124.7	115.1
Balance Sheet
DAC and VOBA			627.6	422
Future Policy Benefits, Losses, Claims, and Loss Expense			23,598.7	21,350.2
Other Policyholders' Funds			54.3	22.7
Individual Life
Segment Reporting Information [Line Items]
Premium Revenue		30.8	33.5	32.1
Net Investment Income		202.9	261.7	242.1
Benefits, claims, and interest credited		313.9	435	385.6
Amortization of DAC and VOBA		1.9	8.4	8.7
Underwriting and operating expenses		87.9	109.9	98.8
Balance Sheet
DAC and VOBA			385.9	250.2
Future Policy Benefits, Losses, Claims, and Loss Expense			7,551.3	7,221.9
Other Policyholders' Funds			50.2	47
Other
Segment Reporting Information [Line Items]
Premium Revenue		0	0	0
Net Investment Income		11.3	28.2	14.3
Benefits, claims, and interest credited		0	0	0
Amortization of DAC and VOBA		0	0	0
Underwriting and operating expenses		$ 25.7	(0.3)	2.3
Balance Sheet
DAC and VOBA			0	0
Future Policy Benefits, Losses, Claims, and Loss Expense			0	0
Other Policyholders' Funds			$ 12.1	$ 14.9
Predecessor Company
Segment Reporting Information [Line Items]
Premium Revenue	$ 61.2
Closed Block, Premium Revenue	0
Total premiums	61.2
Net Investment Income	79.9
Closed Block, Net Investment Income	29.8
Total Net Investment Income	109.7
Benefits, claims, and interest credited	103.2
Closed Block, Benefits, Claims and Interest Credited	30.1
Total Benefits, Claims, and Interest Credited	133.3
Amortization of DAC and VOBA	8
Closed Block, Amortization Of DAC and VOBA	0.6
Total Amortization of DAC and VOBA	8.6
Underwriting and operating expenses	31.8
Closed Block, Other Underwriting and Operating Expenses	1.2
Total Other Underwriting and Operating Expenses	33
Predecessor Company | Benefits
Segment Reporting Information [Line Items]
Premium Revenue	58.6
Net Investment Income	2.1
Benefits, claims, and interest credited	37.1
Amortization of DAC and VOBA	0.2
Underwriting and operating expenses	16.1
Predecessor Company | Retirement
Segment Reporting Information [Line Items]
Premium Revenue	0
Net Investment Income	57.3
Benefits, claims, and interest credited	33.4
Amortization of DAC and VOBA	6.6
Underwriting and operating expenses	8
Predecessor Company | Individual Life
Segment Reporting Information [Line Items]
Premium Revenue	2.6
Net Investment Income	22.9
Benefits, claims, and interest credited	32.7
Amortization of DAC and VOBA	1.2
Underwriting and operating expenses	7.3
Predecessor Company | Other
Segment Reporting Information [Line Items]
Premium Revenue	0
Net Investment Income	(2.4)
Benefits, claims, and interest credited	0
Amortization of DAC and VOBA	0
Underwriting and operating expenses	$ 0.4

Reinsurance - Additional Inform

Reinsurance - Additional Information (Details) - USD ($)	1 Months Ended	11 Months Ended	12 Months Ended			20 Months Ended	50 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Apr. 30, 2017	Jul. 01, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amount retained per life						$ 5,000,000	$ 3,000,000
Reinsurance recoverables			$ 308,300,000	$ 318,200,000		308,300,000
Write-offs of uncollectible insurance			0	0
Reserve for uncollectible insurance			0	0		0
Reduction of policyholder benefits and claims		$ 27,300,000	66,200,000	98,100,000
Deposit asset established			5,920,400,000			5,920,400,000		$ 6,072,600,000
Closed block net statutory reserves due from insurer								5,700,000,000
Reinsurance reserve								$ 6,800,000,000
Medical Stop-Loss
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amount of the excess reinsured per individual claim			2,500,000		$ 2,000,000
Group Life Mortality
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amount of the excess reinsured per individual claim			250,000
Morbidity
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amount of the excess reinsured per individual claim			8,000
Two Highly Rated Insurers
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance recoverables			$ 189,900,000	$ 201,300,000		$ 189,900,000
Reinsurer Concentration Risk | Two Highly Rated Insurers
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Concentration risk percentage			35.00%	35.00%
AM Best, Rating A-, or Higher | Reinsurer Concentration Risk
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Concentration risk percentage			97.60%	97.50%
Predecessor Company
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reduction of policyholder benefits and claims	$ 3,600,000

Reinsurance - Net Life Insuranc

Reinsurance - Net Life Insurance in Force (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Direct life insurance in force	$ 116,515.7	$ 109,179.4	$ 86,142.8
Amounts assumed from other companies	188.4	188.1	187
Amounts ceded to other companies	(29,612.4)	(26,473.9)	(24,452.4)
Net life insurance in force	$ 87,091.7	$ 82,893.6	$ 61,877.4
Percentage of amount assumed to net	0.22%	0.23%	0.30%
Percentage of amount ceded to direct	25.41%	24.25%	28.39%

Reinsurance - Components of Rei

Reinsurance - Components of Reinsurance Recoverables (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Future policy benefits	$ 46.7
Total reinsurance recoverables	308.3	$ 318.2
Life insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Funds held under deposit contracts	104.7	102.4
Future policy benefits	135.4	134.3
Paid claims, expense allowance, premium tax recoverables and other	14.2	18.7
Policy and contract claims	6.4	5.8
Total reinsurance recoverables	260.7	261.2
Accident and health insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Future policy benefits	37.5	40.3
Paid claims, expense allowance, premium tax recoverables and other	3.7	4
Policy and contract claims	6.4	12.7
Total reinsurance recoverables	$ 47.6	$ 57

Reinsurance - Effects of Reinsu

Reinsurance - Effects of Reinsurance on Premiums and Policy Fees and Contract Charges (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Direct:
Total direct		$ 753.8	$ 1,085.8	$ 969.8
Total assumed		0.3	1.2	0.9
Ceded:
Total ceded		(36.6)	(73.7)	(71.2)
Total premiums		717.5	1,013.3	899.5
Policy fees and contract charges:
Direct life insurance and investment-type		220.8	318.4	278
Ceded life insurance and investment-type		(8.1)	(15)	(12.4)
Total policy fees and contract charges		212.7	303.4	265.6
Total premiums and other amounts assessed to policyholders		$ 930.2	$ 1,316.7	$ 1,165.1
Total premiums and other amounts assessed to policyholders		0.03%	0.09%	0.08%
Predecessor Company
Direct:
Total direct	$ 67.4
Total assumed	0
Ceded:
Total ceded	(6.2)
Total premiums	61.2
Policy fees and contract charges:
Direct life insurance and investment-type	18
Ceded life insurance and investment-type	(0.4)
Total policy fees and contract charges	17.6
Total premiums and other amounts assessed to policyholders	$ 78.8
Total premiums and other amounts assessed to policyholders	0.00%
Accident and health insurance
Direct:
Total direct		$ 626.3	$ 879.9	$ 798.7
Ceded:
Total ceded		(0.6)	(27.4)	(26.4)
Accident and health insurance | Predecessor Company
Direct:
Total direct	$ 56.7
Ceded:
Total ceded	(4)
Life insurance
Direct:
Total direct		127.5	205.9	171.1
Ceded:
Total ceded		$ (36)	$ (46.3)	$ (44.8)
Life insurance | Predecessor Company
Direct:
Total direct	10.7
Ceded:
Total ceded	$ (2.2)

Reinsurance - Reconciliation of

Reinsurance - Reconciliation of Deposit Asset and Funds Withheld Liability (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018
Funds Held Under Reinsurance Agreements, Asset [Roll Forward]
Deposit asset at inception	$ 6,072.6
Incurred interest adjustment	(152.2)
Deposit asset at end of period	5,920.4	$ 5,920.4
Funds withheld liability
Funds withheld liability at inception	5,700	0
Ceded investment amounts	303.4
Ceded benefit amounts	(313)
Quarterly settlement due to reinsurer	(33.5)
Changes in fair value of embedded derivative		(67)
Funds withheld liability at end of period	$ 5,589.9	$ 5,589.9

Income Taxes - Differences Betw

Income Taxes - Differences Between Income Tax Computations (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income (loss) from operations before income taxes		$ (51.7)	$ (122.5)	$ 114.7
Tax provision (benefit) at U.S. Federal statutory rate		(18.1)	(25.7)	40.2
Impact of change in enacted tax rates on deferred tax balances		0	(7.7)	(151)
Investment tax credits		(52)	(40.6)	(37)
Dividends received deduction		(1)	(1.7)	(4)
Other		0.6	(0.6)	6.4
Total provision (benefit) for income taxes		$ (70.5)	$ (76.3)	$ (145.4)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax provision (benefit) at U.S. Federal statutory rate (as a percentage)		35.00%	21.00%	35.04795%
Impact of change in enacted tax rates on deferred tax balances (as a percentage)		0.00%	6.30%	(131.60%)
Investment tax credits (as a percentage)		100.80%	33.10%	(32.30%)
Dividends received deduction (as a percentage)		1.90%	1.40%	(3.50%)
Other (as a percentage)		(1.30%)	0.50%	5.60%
Provision (benefit) for income taxes (as a percentage)		136.40%	62.30%	(126.80%)
Predecessor Company
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income (loss) from operations before income taxes	$ (12.8)
Tax provision (benefit) at U.S. Federal statutory rate	(4.5)
Impact of change in enacted tax rates on deferred tax balances	0
Investment tax credits	(4.1)
Dividends received deduction	(0.1)
Other	(0.2)
Total provision (benefit) for income taxes	$ (8.9)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax provision (benefit) at U.S. Federal statutory rate (as a percentage)	35.00%
Impact of change in enacted tax rates on deferred tax balances (as a percentage)	0.00%
Investment tax credits (as a percentage)	32.00%
Dividends received deduction (as a percentage)	0.80%
Other (as a percentage)	1.60%
Provision (benefit) for income taxes (as a percentage)	69.40%

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred acquisition costs and value of business acquired adjustment	$ 22.9	$ 16.9
Deferred income tax assets:
Adjustments to life policy liabilities	340	452.6
Unrealized losses on investment securities (net of DAC and VOBA adjustment: $22.9 for 2018)	85.3	0
Net operating losses	26.8	0
Investment tax credit carryforward	63.1	0
Other	12.4	13.3
Total deferred income tax assets	527.6	465.9
Deferred income tax liabilities:
Deferred policy acquisition costs	52.7	24.4
Basis adjustment on securities	115	210.4
Unrealized gains on investment securities (net of DAC and VOBA adjustment: $16.9 for 2017)	0	146.5
Intangible assets and VOBA	322.7	325.7
Other	7.4	10
Total deferred income tax liabilities	497.8	717
Deferred income tax asset (liability), net	29.8
Deferred income tax asset (liability), net		$ (251.1)
Federal net operating loss carryforward	$ 127.4

Dividends (Details)

Dividends (Details) - USD ($)	11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Dividends Payable [Line Items]
Dividends to Parent without Commissioner approval		$ 221,900,000
Dividends	$ 80,000,000	$ 50,000,000	$ 50,000,000
Scenario, Forecast
Dividends Payable [Line Items]
Dividends to Parent without Commissioner approval				$ 212,700,000

Statutory-Basis Information (De

Statutory-Basis Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Symetra Life
Statutory Accounting Practices [Line Items]
Statutory net income	$ (118.7)	$ 267.8	$ 43.4
Statutory capital and surplus	2,126.6	2,218.9	2,082.4
Subsidiaries
Statutory Accounting Practices [Line Items]
Statutory net income	0.5	11.1	7.3
Statutory capital and surplus	$ 158	$ 135.9	$ 134

Related Parties (Details)

Related Parties (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Receivables			$ 0.1	$ 0.1
Payables			22.9	17.1
Related Party Transaction [Line Items]
Payments related to commutation endorsements		$ 7.4	5.6	7.8
Shared services expenses allocated, net		6.1	8.4	6.9
Concessions, general agent fees, administrative and underwriting fees		$ 8	$ 10.2	10.7
Predecessor Company
Related Party Transaction [Line Items]
Payments related to commutation endorsements	$ 0.6
Shared services expenses allocated, net	0.4
Concessions, general agent fees, administrative and underwriting fees	$ 0.9
Parent
Related Party Transaction [Line Items]
Payments to Acquire Investments				$ 72.2

Uncategorized Items - sya-20181

Label	Element	Value
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	$ 1,700,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	800,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	51,100,000
Predecessor [Member]
Cash and Cash Equivalents, at Carrying Value	us-gaap_CashAndCashEquivalentsAtCarryingValue	254,000,000
Restricted Cash and Cash Equivalents	us-gaap_RestrictedCashAndCashEquivalents	$ 800,000