Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property-liability insurance premiums earned	$ 1,407	$ 1,306	$ 1,274
Property-liability insurance claims and claims expense
Reinsurance ceded amount	524	1,378	1,807
Life and annuity contract benefits
Reinsurance ceded amount	165	240	179
Interest credited to contractholder funds
Reinsurance ceded amount	20	24	25
Property-liability insurance premiums earned
Property-liability insurance premiums earned	1,122	1,016	971
Life and annuity premiums and contract charges
Life and annuity premiums and contract charges	$ 285	$ 290	$ 303