Insurance Premiums and Service Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Insurance Premiums and Service Revenue [Abstract]

Insurance Premiums and Service Revenue

The following table is a summary of insurance premiums and service revenue written and earned.

	2021				2020				2019
Year ended December 31, ($ in millions)	Written		Earned		Written		Earned		Written		Earned
Insurance premiums
Direct	$	397	$	389	$	438	$	429	$	491	$	464
Assumed	15		8		3		3		—		2
Gross insurance premiums	412		397		441		432		491		466
Ceded	(200)		(205)		(211)		(208)		(232)		(209)
Net insurance premiums	212		192		230		224		259		257
Service revenue	985		925		999		879		1,051		830
Insurance premiums and service revenue written and earned	$	1,197	$	1,117	$	1,229	$	1,103	$	1,310	$	1,087