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Stockholders' Equity - Schedule of Share Repurchases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Class of Stock [Line Items]
Number of shares repurchased (in shares)	1,329,725	6,348,435	1,329,725	9,279,177
Cash paid for shares repurchased	$ 50	$ 371	$ 50	$ 537
REH Company
Class of Stock [Line Items]
Number of shares repurchased (in shares)				7,864,761
Cash paid for shares repurchased			$ 0	$ 456

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