Insurance (Tables)

12 Months Ended

Dec. 31, 2021

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):

	2020		2021
Cash and cash equivalents	$	22	$	28
Marketable securities	703		696
Total cash, cash equivalents, and marketable securities	$	725	$	724

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):

	2019		2020		2021
Insurance losses	$	128	$	110	$	45
Loss adjustment expenses	7		5		2
Reinsurance income and other expenses, net	(32)		(33)		(37)
Insurance expenses	$	103	$	82	$	10

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):

	2019				2020				2021
	Written		Earned		Written		Earned		Written		Earned
Direct	$	406	$	377	$	366	$	350	$	324	$	293
Assumed	—		—		—		—		—		—
Ceded	(223)		(195)		(229)		(207)		(252)		(218)
Net premiums	$	183	$	182	$	137	$	143	$	72	$	75