Parent Company Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net income attributable to controlling interest	$ 775	$ 897	$ 900
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	(17)	44	91
Stock-based compensation expense	59	36	75
Gain on sale of title services business	0	(9)	0
Total adjustments	474	383	1,379
Investing Activities
Proceeds from sales and prepayments of securities	1,155	0	0
Proceeds from business divestitures, net	0	0	22
Net cash (used in) provided by investing activities	(1,058)	(2,605)	8,333
Preferred stock:
Proceeds from issuance of preferred stock	0	0	494
Call of preferred stock	(100)	0	0
Cash dividends paid - preferred stock	(29)	(32)	(32)
Common stock:
Stock options exercised	9	5	36
Cash dividends paid	(332)	(335)	(324)
Repurchase of shares	(626)	(10)	(12)
Net cash (used in) provided by financing activities	(404)	1,494	(10,869)
Net (decrease) increase in cash and cash equivalents	(194)	188	(245)
Cash and cash equivalents at beginning of period	1,731	1,543	1,788
Cash and cash equivalents at end of period	1,537	1,731	1,543
Total interest paid	1,869	1,428	280
Income taxes received from (paid to) subsidiaries	106	123	20
Parent Company
Operating activities:
Net income attributable to controlling interest	775	897	900
Less undistributed net income (loss) of subsidiaries	(237)	610	555
Income before undistributed net income (loss) of subsidiaries	1,012	287	345
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	15	8	7
Stock-based compensation expense	59	36	76
Gain on sale of title services business	0	0	(22)
Other operating activities, net	(18)	0	2
Total adjustments	56	44	63
Net cash provided by operating activities	1,068	331	408
Investing Activities
Proceeds from sales and prepayments of securities	3	21	8
Purchases of securities	(1)	(1)	(1)
(Investment in) return on subsidiary	(9)	(10)	13
Net cash (used in) provided by investing activities	(7)	10	42
Preferred stock:
Proceeds from issuance of preferred stock	0	0	494
Call of preferred stock	(100)	0	0
Cash dividends paid - preferred stock	(29)	(32)	(32)
Common stock:
Stock options exercised	9	5	36
Cash dividends paid	(332)	(335)	(324)
Repurchase of shares	(626)	(10)	(13)
Repayment of term borrowings	0	(450)	0
Net cash (used in) provided by financing activities	(1,078)	(822)	161
Net (decrease) increase in cash and cash equivalents	(17)	(481)	611
Cash and cash equivalents at beginning of period	854	1,335	724
Cash and cash equivalents at end of period	837	854	1,335
Total interest paid	26	33	35
Income taxes received from (paid to) subsidiaries	$ 60	$ (46)	$ 42