Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Federal net operating loss carryforwards	$ 51	$ 51
Foreign underwriting losses	50	46
Insurance claims and reserves	558	528
Employee benefits	98	91
Other, net	51	36
Total deferred tax assets before valuation allowance	808	752
Valuation allowance against deferred tax assets	(103)	(101)
Total deferred tax assets	705	651
Deferred tax liabilities:
Subsidiaries not in AFG’s tax return ()	(60)	(58)
Investment securities	(443)	(753)
Deferred policy acquisition costs	(234)	(91)
Total deferred tax liabilities	(737)	(902)
Net deferred tax liability	$ (32)	$ (251)