Schedule of Contract Provisions Related to Policyholders' Account Balances (Detail) (Predecessor)	12 Months Ended
Dec. 31, 2014
Other investment contracts
Interest rate description	Interest rates used in establishing reserves range from 1.7% to 10.3%
Interest rate, low end	1.70%
Interest rate, high end	10.30%
Withdrawal/surrender charges	Withdrawal and surrender charges are based on the terms of the related interest-sensitive life insurance or fixed annuity contract
Fixed annuities
Interest rate description	Interest rates credited range from 0% to 8.8% fo immediate annuities; 0% to 7.0% for equity-indexed annuities (whose returns are indexed to the S&P 500); and 1.0% to 6.0% for all other products
Withdrawal/surrender charges	Either a declining or a level percentage charge generally over ten years or less. Additionally, approximately 18.7% of fixed annuities are subject to market value adjustment for discretionary withdrawals.
Term of withdrawal/surrender charges	10 years
Percentage of fixed annuities subject to market value adjustment for discretionary withdrawals	18.70%
Fixed annuities \| Immediate annuities
Interest rate, low end	0.00%
Interest rate, high end	8.80%
Fixed annuities \| Equity-indexed life
Interest rate, low end	0.00%
Interest rate, high end	7.00%
Fixed annuities \| All other products
Interest rate, low end	1.00%
Interest rate, high end	6.00%
Interest-sensitive life insurance
Interest rate description	Interest rates credited range from 0% to 10.0% for equity-indexed life (whose returns are indexed to the S&P 500) and 2.6% to 6.0% for all other products
Withdrawal/surrender charges	Either a percentage of account balance or dollar amount grading off generally over 20 years
Term of withdrawal/surrender charges	20 years
Interest-sensitive life insurance \| Equity-indexed life
Interest rate, low end	0.00%
Interest rate, high end	10.00%
Interest-sensitive life insurance \| All other products
Interest rate, low end	2.60%
Interest rate, high end	6.00%

Annuities Subject To Market Value Adjustment For Discretionary Withdrawals

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- Definition

Fixed Annuities, Interest Rate Assumptions

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Fixed Annuities, Interest Rate Assumptions, High End

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- Definition

Fixed Annuities, Interest Rate Assumptions, Low End

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- Definition

Other Investment Contracts, Interest Rate Assumptions

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- Definition

Other Investment Contracts, Interest Rate Assumptions, High End

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Other Investment Contracts, Interest Rate Assumptions, Low End

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- Definition

Policyholder Contract Deposits, Description Of Withdrawal Or Surrender Charges

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- Definition

Term Of Withdrawal Or Surrender Charges

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Assumptions regarding interest rates applied to monetary deposits made by or on behalf of policyholders for contracts that may contractually vary the amount and timing of premium payments without the approval of the insurer and in which premium payments are credited to the policyholder balance, against which amounts are assessed for contract services and to which amounts are credited as income. The policyholder balance provides a base upon which interest accrues to the policyholder and, when compared with the death benefit amount, fixes the insurer's net amount at risk. The insurer can often adjust the schedule of amounts assessed for contract services and the rate at which interest is credited to the policyholder balance, including the duration.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph b

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a),13(b))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

The maximum interest rate applied during the stated period to monetary deposits made by or on behalf of policyholders for contracts that may contractually vary the amount and timing of premium payments without the approval of the insurer and in which premium payments are credited to the policyholder balance, against which amounts are assessed for contract services and to which amounts are credited as income. The policyholder balance provides a base upon which interest accrues to the policyholder and, when compared with the death benefit amount, fixes the insurer's net amount at risk. The insurer can often adjust the schedule of amounts assessed for contract services and the rate at which interest is credited to the policyholder balance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph b

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.13(b))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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The minimum interest rate applied to deposits made by or on behalf of policyholders to contracts that may contractually vary the amount and timing of premium payments without the approval of the insurer and in which premium payments are credited to the policyholder balance, against which amounts are assessed for contract services and to which amounts are credited as income. The policyholder balance provides a base upon which interest accrues to the policyholder and, when compared with the death benefit amount, fixes the insurer's net amount at risk. The insurer can often adjust the schedule of amounts assessed for contract services and the rate at which interest is credited to the policyholder balance. during the stated period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph b

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.13(b))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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