Condensed Financial Information of Parent Company - Condensed Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and cash equivalents		$ 2,314	$ 1,515	$ 2,338	$ 2,107
Other investments		278	267
Other assets		1,867	1,529
Total assets		70,130	63,456	60,658
Liabilities and Equity:
Long-term debt		1,473	1,302
Other liabilities		2,295	1,774
Shareholders’ equity		6,269	4,970
Total liabilities and equity		70,130	63,456
AFG
Assets:
Cash and cash equivalents		166	158	$ 299	$ 197
Investment in securities		77	65
Investment in subsidiaries	[1]	7,623	6,155
Other investments		2	2
Other assets		143	68
Total assets		8,011	6,448
Liabilities and Equity:
Long-term debt		1,473	1,302
Other liabilities		269	176
Shareholders’ equity		6,269	4,970
Total liabilities and equity		$ 8,011	$ 6,448

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