Insurance Premiums and Service Revenue

12 Months Ended

Dec. 31, 2020

Insurance Premiums and Service Revenue [Abstract]

Insurance Premiums and Service Revenue Disclosure

Insurance Premiums and Service Revenue

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

	2020				2019				2018
Year ended December 31, ($ in millions)	Written		Earned		Written		Earned		Written		Earned
Insurance premiums
Direct	$	438	$	429	$	491	$	464	$	420	$	414
Assumed	3		3		—		2		—		4
Gross insurance premiums	441		432		491		466		420		418
Ceded	(211)		(208)		(232)		(209)		(219)		(197)
Net insurance premiums	230		224		259		257		201		221
Service revenue	999		879		1,051		830		973		801
Insurance premiums and service revenue written and earned	$	1,229	$	1,103	$	1,310	$	1,087	$	1,174	$	1,022