Risk associated with risk of surrenders, expressed as a percentage, used as an input to measure fair value.

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- Definition

Fair Value Measurements.

+ References

No definition available.

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- Definition

Level Three Asset As Percentage Of Asset Measured At Fair Value.

+ References

No definition available.

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- Definition

Level three assets that were priced using non-binding broker quotes.

+ References

No definition available.

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- Definition

Financial liabilities on annuities in the payout phase that are contingent on the survival of the annuitant(s).

+ References

No definition available.

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- Definition

Number of internal investment professionals.

+ References

No definition available.

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- Definition

The sum of number of stocks transferred from Level 1 to Level 2 for each applicable quarter end period.

+ References

No definition available.

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- Definition

The sum of number of stocks transferred from Level 2 to Level 1 for each applicable quarter end period.

+ References

No definition available.

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- Definition

Percentage of Internally Developed Level 3 Assets to Total Shareholders' Equity

+ References

No definition available.

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- Definition

Percentage of level 3 assets that were priced using non-binding broker quotes.

+ References

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

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-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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-Section 45
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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

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Fair Value Measurements - Narrative (Details) $ in Millions	3 Months Ended
Fair Value Measurements - Narrative (Details) $ in Millions	Mar. 31, 2017 USD ($) professional stock	Mar. 31, 2016 USD ($) stock	Dec. 31, 2016 USD ($)
Fair Value Measurements (Textual) [Abstract]
AFG's internal investment professionals \| professional	25
Number of stocks transferred from Level 1 to Level 2 \| stock	0
Number of stocks transferred from Level 2 to Level 1 \| stock	0
Level 3 assets as a percentage of total assets measured at fair value	4.00%
Percentage of level 3 assets that were priced using non-binding broker quotes	75.00%
Level 3 assets that were priced using non-binding broker quotes	$ 1,490
Life contingent annuities	$ 203		$ 204
Maximum
Fair Value Measurements (Textual) [Abstract]
Percentage of internally developed Level 3 asset fair values to Shareholders' equity (are less than)	10.00%
Fixed-indexed annuties (embedded derivative), majority of future years \| Minimum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination	6.00%
Fixed-indexed annuties (embedded derivative), majority of future years \| Maximum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination	10.00%
Fixed-indexed annuities (embedded derivative)
Fair Value Measurements (Textual) [Abstract]
Fair value of derivatives in annuity benefits accumulated measured using a discounted cash flow approach	$ 1,960
Fixed-indexed annuities (embedded derivative) \| Minimum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination	3.00%
Fixed-indexed annuities (embedded derivative) \| Maximum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination	21.00%
Perpetual preferred stocks
Fair Value Measurements (Textual) [Abstract]
Number of stocks transferred from Level 1 to Level 2 \| stock		3
Number of stocks transferred from Level 2 to Level 1 \| stock		1
Fair value of assets transferred from Level 2 to Level 1, during the first three months		$ 8
Fair value of assets transferred from Level 1 to Level 2, during the first three months		$ 6