Condensed Financial Information of Parent Company - Condensed Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents		$ 1,515	$ 2,338	$ 2,107	$ 1,220
Other investments		267	312
Other assets		1,529	1,504
Total assets		63,456	60,658	55,072
Liabilities and Equity:
Long-term debt		1,302	1,301
Other liabilities		1,774	1,887
Shareholders’ equity		4,970	5,330
Total liabilities and equity		63,456	60,658
AFG
Assets:
Cash and cash equivalents		158	299	$ 197	$ 189
Investment in securities		65	70
Investment in subsidiaries	[1]	6,155	6,310
Other investments		2	2
Other assets		68	141
Total assets		6,448	6,822
Liabilities and Equity:
Long-term debt		1,302	1,301
Other liabilities		176	191
Shareholders’ equity		4,970	5,330
Total liabilities and equity		$ 6,448	$ 6,822

[1] Investment in subsidiaries includes intercompany receivables and payables.