Reinsurance and Indemnification (Tables)

12 Months Ended

Dec. 31, 2023

Reinsurance Disclosures [Abstract]

Schedule of Effects of Reinsurance and Indemnification on Property and Casualty Premiums Written and Earned and Accident and Health Insurance Premiums and Contract Charges

Effects of reinsurance and indemnification on property and casualty premiums written and earned and accident and health insurance premiums and contract charges
	For the years ended December 31,
($ in millions)	2023		2022		2021
Property and casualty insurance premiums written
Direct	$	54,632	$	50,065	$	45,523
Assumed	396		245		213
Ceded	(2,018)		(1,824)		(1,736)
Property and casualty insurance premiums written, net of recoverables	$	53,010	$	48,486	$	44,000
Property and casualty insurance premiums earned
Direct	$	52,301	$	47,552	$	43,944
Assumed	358		221		178
Ceded	(1,989)		(1,869)		(1,904)
Property and casualty insurance premiums earned, net of recoverables	$	50,670	$	45,904	$	42,218
Accident and health insurance premiums and contract charges
Direct	$	1,865	$	1,838	$	1,892
Assumed	28		31		21
Ceded	(47)		(37)		(79)
Accident and health insurance premiums and contract charges, net of recoverables	$	1,846	$	1,832	$	1,834

Schedule of Effects of Reinsurance Ceded and Indemnification Programs on Property and Casualty Insurance Claims and Claims Expense and Accident, Health and Other Policy Benefits

Effects of reinsurance ceded and indemnification programs on property and casualty insurance claims and claims expense and accident, health and other policy benefits
($ in millions)	For the years ended December 31,
	2023		2022		2021
Property and casualty insurance claims and claims expense (1)	$	(633)	$	(1,600)	$	(3,484)
Accident, health and other policy benefits	(44)		15		(91)

(1)Includes approximately $39 million of ceded losses related to the Nationwide Reinsurance Program for 2023.

Schedule of Reinsurance and Indemnification Recoverables, Net

Reinsurance and indemnification recoverables, net
	As of December 31,
($ in millions)	2023		2022
Property and casualty
Paid and due from reinsurers and indemnitors	$	254	$	291
Unpaid losses estimated (including IBNR)	8,396		9,176
Total property and casualty	$	8,650	$	9,467
Accident and health insurance	159		152
Total	$	8,809	$	9,619

Schedule of Rollforward of Credit Loss Allowance for Reinsurance Recoverables

Rollforward of credit loss allowance for reinsurance recoverables
	For the years ended December 31,
($ in millions)	2023		2022
Property and casualty (1) (2)
Beginning balance	$	(62)	$	(66)
Increase in the provision for credit losses	(1)		(5)
Write-offs	1		9
Ending balance	$	(62)	$	(62)
Accident and health insurance
Beginning balance	$	(3)	$	(8)
Decrease/(Increase) in the provision for credit losses	—		5
Write-offs	—		—
Ending Balance	$	(3)	$	(3)

(1)Primarily related to Run-off Property-Liability reinsurance ceded.

(2)Indemnification recoverables are considered collectible based on the industry pool and facility enabling legislation.