Insurance (Tables)

12 Months Ended

Dec. 31, 2023

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):

	2022		2023
Cash and cash equivalents	$	55	$	82
Marketable securities	607		649
Total cash, cash equivalents, and marketable securities	$	662	$	731

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):

	2021		2022		2023
Insurance losses	$	45	$	34	$	90
Loss adjustment expenses	2		2		4
Reinsurance income and other expenses, net	(37)		(40)		(41)
Insurance expenses	$	10	$	(4)	$	53

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):

	2021				2022				2023
	Written		Earned		Written		Earned		Written		Earned
Direct	$	324	$	293	$	337	$	306	$	394	$	359
Assumed	—		—		—		—		—		—
Ceded	(252)		(218)		(264)		(231)		(275)		(240)
Net premiums	$	72	$	75	$	73	$	75	$	119	$	119