Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Oct. 30, 2025	Sep. 16, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	May 07, 2024
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)			3,134,076	2,665,000	4,463,801	11,944,177
Cash paid for shares repurchased			$ 161	$ 128	$ 211	$ 674
Common stock withheld under stock-based compensation agreements (in shares)					2,444	60,116
Dividends declared per common share (in USD per share)			$ 0.50	$ 0.50	$ 1.50	$ 1.50
Subsequent Event
Class of Stock [Line Items]
Dividends declared per common share (in USD per share)	$ 0.50
REH
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)			1,948,558		1,948,558	7,864,761
May 2024 Share Repurchase Program
Class of Stock [Line Items]
Authorized share repurchase amount							$ 1,000
Remaining authorized share repurchase amount			$ 589		$ 589
May 2024 Share Repurchase Program | REH
Class of Stock [Line Items]
Shares purchased under share repurchase program (in shares)		1,948,558
Price per share of stock repurchased (in USD per share)		$ 51.32
Cash paid for shares repurchased		$ 100