Operating Segments - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) numberOfSegments	Jun. 30, 2022 USD ($)	Apr. 03, 2023
Segment Reporting Information [Line Items]
Number of Major Reportable Business Segments | numberOfSegments			3
Provision for income taxes	$ 287	$ 372	$ 681	$ 702
IH
Segment Reporting Information [Line Items]
Noncontrolling interest minority stake sale					20
Provision for income taxes	54
Mandatorily Redeemable Preferred Stock | IH
Segment Reporting Information [Line Items]
Preferred Stock, Value, Issued	$ 5,000		$ 5,000
Dividend Rate			8.25%