Insurance (Tables)

12 Months Ended

Dec. 31, 2022

Insurance [Abstract]

Schedule of Insurance Assets [Table Text Block]

Cash, cash equivalents, and marketable securities related to insurance activities at December 31 were as follows (in millions):

	2021		2022
Cash and cash equivalents	$	28	$	55
Marketable securities	696		607
Total cash, cash equivalents, and marketable securities	$	724	$	662

Schedule of Insurance Underwriting Losses and Expenses [Table Text Block]

The components of insurance expenses for the years ended December 31 were as follows (in millions):

	2020		2021		2022
Insurance losses	$	110	$	45	$	34
Loss adjustment expenses	5		2		2
Reinsurance income and other expenses, net	(33)		(37)		(40)
Insurance expenses	$	82	$	10	$	(4)

Schedule of the Effect of Reinsurance Premiums Written and Earned [Table Text Block]

Insurance premiums written and earned for the years ended December 31 were as follows (in millions):

	2020				2021				2022
	Written		Earned		Written		Earned		Written		Earned
Direct	$	366	$	350	$	324	$	293	$	337	$	306
Assumed	—		—		—		—		—		—
Ceded	(229)		(207)		(252)		(218)		(264)		(231)
Net premiums	$	137	$	143	$	72	$	75	$	73	$	75