Reserve for Property and Casualty Insurance Claims and Claims Expense (Tables)

6 Months Ended

Jun. 30, 2021

Reserve for Property-Liability Insurance Claims and Claims Expense [Abstract]

Schedule of liability for unpaid claims and claims adjustment expense

Rollforward of the reserve for property and casualty insurance claims and claims expense
	Six months ended June 30,
($ in millions)	2021		2020
Balance as of January 1	$	27,610	$	27,712
Less recoverables (1)	(7,033)		(6,912)
Net balance as of January 1	20,577		20,800
National General acquisition as of January 4, 2021	1,797		—
Incurred claims and claims expense related to:
Current year	13,476		10,566
Prior years	(226)		(3)
Total incurred	13,250		10,563
Claims and claims expense paid related to:
Current year	(6,919)		(5,777)
Prior years	(6,134)		(5,173)
Total paid	(13,053)		(10,950)
Net balance as of June 30	22,571		20,413
Plus recoverables	9,066		7,013
Balance as of June 30	$	31,637	$	27,426

(1)Recoverables comprises reinsurance and indemnification recoverables.

Prior year reserve reestimates included in claims and claims expense (1)
	Six months ended June 30,
	Non-catastrophe losses				Catastrophe losses				Total
($ in millions)	2021		2020		2021 (2) (3)		2020		2021		2020
Auto	$	(46)	$	(26)	$	(23)	$	(15)	$	(69)	$	(41)
Homeowners	(2)		(3)		(171)		19		(173)		16
Other personal lines	(3)		(6)		(14)		(2)		(17)		(8)
Commercial lines	31		24		2		3		33		27
Run-off Property-Liability	2		4		—		—		2		4
Protection Services	(2)		(1)		—		—		(2)		(1)
Total prior year reserve reestimates	$	(20)	$	(8)	$	(206)	$	5	$	(226)	$	(3)

(1)Favorable reserve reestimates are shown in parentheses.

(2)Includes approximately $200 million of estimated recoveries related to Nationwide Aggregate Reinsurance Program cover for aggregate catastrophe losses occurring between April 1, 2020 and December 31, 2020, which primarily impacted homeowners reestimates.

(3)Includes approximately $110 million favorable subrogation settlements arising from the Woolsey wildfire, which primarily impacted homeowners reestimates.