Fair Value of Financial Instruments - Schedule of Unobservable Inputs Used for Level Three Fair Value Measurements of Financial Instruments on Recurring Basis (Detail) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended | | |
Jun. 30, 2015 | Jun. 30, 2013 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012 |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | | | | | $ 2,778.6 | | $ 2,059.4 | | $ 1,875.2 | $ 1,782.8 |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | | | $ 95.2 | | 266 | | 383.4 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | | | 0 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases | | | 0 | | 445.4 | | 150.6 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales | | | 0 | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | | | 2.8 | | (7.8) | | 349.8 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net | | | 0 | [1] | 0 | [2] | 0 | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | (0.1) | | (6.8) | | 1.7 | | | |
Other invested assets | | | | | 39.6 | | 28.8 | | | |
Assets, Fair Value Disclosure | | | | | 1,233.1 | | 1,066 | | | |
Liabilities | | | | | | | | | | |
Liabilities, Fair Value Disclosure | | | | | 2,778.6 | | 2,059.4 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | (14) | | 9.9 | | 22.2 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 428.2 | | 323.2 | | 570.5 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 20.3 | | 1.6 | | 12.1 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 23.3 | | 142.2 | | 15.9 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | $ (34.5) | (53) | [1] | (15.4) | [2] | (23.9) | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 1,233.1 | | 1,066 | | 523.5 | 206 |
Funds withheld for reinsurance liability [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | | | 0 | | | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | | | 0 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | | | 19.2 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | | | 0 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | | | 0 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | [2] | | | | 0 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 19.2 | | 0 | | | |
Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | 0 | | 0.1 | | | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | (0.2) | | (0.1) | | (0.3) | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 0 | | 14.2 | | 36.1 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 0.2 | | 30.7 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | | (10.5) | [1] | (10.4) | [2] | (3.8) | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 10.1 | | 37 | | 5 | 15.9 |
Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | 0 | | | | | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | (0.3) | | (1.8) | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 1 | | 63.9 | | 83.7 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 0 | | | | 0.3 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 0 | | 1.6 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | | 0 | [1] | | | (6) | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 143.6 | | 83.1 | | 5.7 | 5 |
Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | (0.3) | | 1.9 | | | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | (13.4) | | 10.1 | | 19.1 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 406 | | 201.4 | | 398.1 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 9.6 | | 1.6 | | 11.8 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 23.1 | | 59.5 | | 2.4 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | | (33.8) | [1] | (24.1) | [2] | (14.1) | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 978.2 | | 850 | | 461.1 | 135.3 |
Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | 0.2 | | 0 | | 0 | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | | | 0 | | 1.2 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 10.5 | | 24.5 | | 4.8 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 10.7 | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 0 | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | | | | 0 | [2] | 0 | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 30.5 | | 6 | | 0 | |
Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | | | (17.3) | | (0.1) | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | | | 0 | | 11.3 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | | | 0 | | 0 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | | | | | 19.1 | [2] | 0 | [3] | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | 13 | | 11.2 | | 0 | |
Hybrids | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | 0 | | | | | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | (0.1) | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | [1] | | (8.7) | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | | | | | 0 | 8.8 |
Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Contingent Purchase Price Reduction Receivable Fair Value Disclosure | | | | | 0 | | 41.5 | | | |
Funds Withheld Receivable | [4] | | | | 652.3 | | 154.4 | | | |
Fair Value, Measurements, Recurring | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 1,860.5 | | 1,792.9 | | | |
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 882.2 | | 636.9 | | | |
Fair Value, Measurements, Recurring | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 9,544.7 | | 9,795.8 | | | |
Fair Value, Measurements, Recurring | Hybrids | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 1,213.3 | | 1,316.1 | | | |
Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | | | 0 | | 8.5 | | 0.5 | | | |
Liabilities | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | | | 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements | | | 0 | | 50 | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | [1] | | $ 0 | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | | | | | | | 41.5 | | $ 41 | $ 41 |
Available-for-sale embedded derivatives | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Equity securities - available-for-sale | | | | | 616.6 | | 663.6 | | | |
FIA embedded derivatives, included in contractholder funds | Fair Value, Measurements, Recurring | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Derivative Liability | | | | | $ 2,149.4 | | $ 1,908.1 | | | |
Minimum [Member] | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 100.00% | | 100.00% | | | |
Minimum [Member] | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 99.00% | | 105.00% | | | |
Minimum [Member] | Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Probability of collection | | | | | 0.00% | | 88.00% | | | |
Minimum [Member] | Funds withheld for reinsurance liability [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value Inputs, Discount Rate | | | | | 6.00% | | | | | |
Minimum [Member] | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Market value of option | | | | | 0.00% | | 0.00% | | | |
Maximum | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 108.00% | | 109.00% | | | |
Maximum | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 119.00% | | 121.00% | | | |
Maximum | Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Probability of collection | | | | | 0.00% | | 96.00% | | | |
Fair Value Inputs, Discount Rate | | | | | 0.00% | | 1.00% | | | |
Credit insurance risk premium | | | | | 0.00% | | 12.00% | | | |
Maximum | Funds withheld for reinsurance liability [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value Inputs, Discount Rate | | | | | 12.00% | | | | | |
Maximum | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Market value of option | | | | | 34.00% | | 50.00% | | | |
SWAP rates | | | | | 2.00% | | 3.00% | | | |
Weighted average | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 103.00% | | 101.00% | | | |
Weighted average | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 111.00% | | 118.00% | | | |
Weighted average | Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value Inputs Quoted Prices | | | | | 100.00% | | 100.00% | | | |
Offered quotes | | | | | 100.00% | | 0.00% | | | |
Weighted average | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value Inputs Black Scholes Model | | | | | 100.00% | | 0.00% | | | |
Probability of collection | | | | | 50.00% | | 0.00% | | | |
Fair Value Inputs, Discount Rate | | | | | 10.00% | | 0.00% | | | |
Weighted average | Municipal Debt Securities [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 111.00% | | 107.00% | | | |
Weighted average | Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Probability of collection | | | | | 0.00% | | 92.00% | | | |
Weighted average | Funds withheld for reinsurance liability [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value Inputs, Discount Rate | | | | | 8.00% | | 0.00% | | | |
Weighted average | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Market value of option | | | | | 1.00% | | 3.00% | | | |
SWAP rates | | | | | 2.00% | | 2.00% | | | |
Mortality multiplier | | | | | 80.00% | | 80.00% | | | |
Non-performance spread | | | | | 0.25% | | 0.25% | | | |
Market Approach Valuation Technique [Member] | Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Net Asset Value | | | | | |
Assets, Fair Value Disclosure | | | | | $ 25 | | $ 0 | | | |
Broker Quoted [Member] | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Broker-quoted | | | | | |
Broker Quoted [Member] | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Broker-quoted | | | | | |
Broker Quoted [Member] | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Broker-quoted | | | | | |
Assets, Fair Value Disclosure | | | | | $ 911.7 | | $ 848 | | | |
Broker Quoted [Member] | Municipal | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Broker-quoted | | | | | |
Broker Quoted [Member] | Minimum [Member] | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 57.00% | | 62.00% | | | |
Broker Quoted [Member] | Maximum | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 114.00% | | 120.00% | | | |
Broker Quoted [Member] | Weighted average | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Offered quotes | | | | | 101.00% | | 100.00% | | | |
Discounted Cash Flow [Member] | Funds withheld for reinsurance liability [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Discounted Cash Flow | | | | | |
Discounted Cash Flow [Member] | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Discounted Cash Flow | | | | | |
Discounted Cash Flow [Member] | Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Discounted cash flow | | | | | |
Discounted Cash Flow [Member] | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Discounted cash flow | | | | | |
Discounted Cash Flow [Member] | Minimum [Member] | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
SWAP rates | | | | | 1.00% | | 2.00% | | | |
Surrender rates | | | | | 0.50% | | 0.50% | | | |
Discounted Cash Flow [Member] | Maximum | Contingent Purchase Price Reduction Receivable [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Expected term | | | | | 0 years | | 4 months 5 days | | | |
Discounted Cash Flow [Member] | Maximum | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Surrender rates | | | | | 75.00% | | 75.00% | | | |
Discounted Cash Flow [Member] | Weighted average | FIA embedded derivatives, included in contractholder funds | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Surrender rates | | | | | 10.00% | | 7.00% | | | |
Matrix Pricing [Member] | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Matrix Pricing | | | | | |
Assets, Fair Value Disclosure | | | | | $ 66.5 | | $ 2 | | | |
Matrix Pricing [Member] | Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Matrix Pricing | | | | | |
Matrix Pricing [Member] | Minimum [Member] | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Quoted prices | | | | | 105.00% | | 0.00% | | | |
Matrix Pricing [Member] | Maximum | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Quoted prices | | | | | 142.00% | | 0.00% | | | |
Matrix Pricing [Member] | Weighted average | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Quoted prices | | | | | 110.00% | | 142.00% | | | |
Black Scholes Model [Member] | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Black scholes model | | | | | |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Funds Withheld Receivable | [4] | | | | $ 19.2 | | $ 0 | | | |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 10.1 | | 37 | | | |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 143.6 | | 83.1 | | | |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | Corporates | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 978.2 | | 850 | | | |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | Hybrids | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 0 | | 0 | | | |
Fair Value, Inputs, Level 3 [Member] | Contingent Purchase Price Reduction Receivable [Member] | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Contingent Purchase Price Reduction Receivable Fair Value Disclosure | | | | | | | 41.5 | | | |
Fair Value, Inputs, Level 3 [Member] | Market Pricing [Member] | Fair Value, Measurements, Recurring | Municipal Bonds [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | | | 37.2 | | | |
Fair Value, Inputs, Level 3 [Member] | Broker Quoted [Member] | Fair Value, Measurements, Recurring | Asset-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 10.1 | | | | | |
Fair Value, Inputs, Level 3 [Member] | Broker Quoted [Member] | Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 143.6 | | | | | |
Fair Value, Inputs, Level 3 [Member] | Broker Quoted [Member] | Fair Value, Measurements, Recurring | Municipal Bonds [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Available-for-sale Securities | | | | | 38.5 | | | | | |
Fair Value, Inputs, Level 3 [Member] | Broker Quoted [Member] | Available-for-sale embedded derivatives | Fair Value, Measurements, Recurring | Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Equity securities - available-for-sale | | | | | 6 | | 6 | | | |
Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow [Member] | Contingent Purchase Price Reduction Receivable [Member] | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Contingent Purchase Price Reduction Receivable Fair Value Disclosure | | | | | 0 | | | | | |
Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow [Member] | FIA embedded derivatives, included in contractholder funds | Fair Value, Measurements, Recurring | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Derivative Liability | | | | | $ 2,149.4 | | 1,908.1 | | | |
Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow [Member] | Front Street Future Policyholder Benefits Reserve [Member] | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Valuation Technique | | | | | Discounted cash flow | | | | | |
Liabilities | | | | | | | | | | |
Derivative Liability | | | | | $ 629.2 | | 151.3 | | | |
Fair Value, Inputs, Level 3 [Member] | Matrix Pricing [Member] | Available-for-sale embedded derivatives | Fair Value, Measurements, Recurring | Equity Securities | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Equity securities - available-for-sale | | | | | 30.5 | | | | | |
Other invested assets | Fair Value, Measurements, Recurring | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Other invested assets | | | | | 13 | | 13.3 | | | |
Other invested assets | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Other invested assets | | | | | 13 | | | | | |
Other invested assets | Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow [Member] | Fair Value, Measurements, Recurring | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Other invested assets | | | | | 2.8 | | 0 | | | |
Other invested assets | Fair Value, Inputs, Level 3 [Member] | Option Pricing [Member] | Fair Value, Measurements, Recurring | Other invested assets | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Other invested assets | | | | | 10.2 | | 11.2 | | | |
Front Street Future Policyholder Benefits Reserve [Member] | | | | | | | | | | |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | | | | | | | | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | | | | | 629.2 | | 151.3 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | | | | | 24.7 | | 7 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases | | | | | 445.4 | | 150.6 | | | |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements | | | | | $ (7.8) | | $ 6.3 | | | |
Front Street Future Policyholder Benefits Reserve [Member] | Minimum [Member] | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Non-performance spread | | | | | 0.16% | | 0.50% | | | |
Risk margin for uncertainty | | | | | 1.00% | | | | | |
Front Street Future Policyholder Benefits Reserve [Member] | Maximum | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Non-performance spread | | | | | 0.46% | | 1.50% | | | |
Risk margin for uncertainty | | | | | 1.00% | | | | | |
Front Street Future Policyholder Benefits Reserve [Member] | Weighted average | | | | | | | | | | |
Liabilities | | | | | | | | | | |
Risk margin for uncertainty | | | | | 0.00% | | 0.50% | | | |
| |
[1] | (a) The net transfers out of Level 3 during Fiscal 2013 were exclusively to Level 2. | |
[2] | (a) During Fiscal 2015, the net transfers out of Level 3 were exclusively to Level 2 and the net transfer to Level 3 was related to a loan receivable previously eliminated upon consolidation. | |
[3] | (a) The net transfers in and out of Level 3 during Fiscal 2014 were exclusively to or from Level 2. | |
[4] | (a) included in “Other assets” in the Consolidated Balance Sheets. | |