STOCKHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 20, 2025	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 19, 2025	Feb. 16, 2024	Feb. 15, 2024
Equity, Class of Treasury Stock [Line Items]
Cash dividend declared (in dollars per share)		$ 0.885
Dividends		$ 107
Increase in treasury stock from share repurchases			$ 803	$ 1,586	$ 2,096
Common shares acquired in connection with employee stock plans (in shares)			0.2	0.2	0.2
Common shares acquired in connection with employee stock plans, amount			$ 46	$ 73	$ 96
Aggregate statutory capital and surplus in our state regulated insurance subsidiaries		13,200	13,200	12,200
Aggregate minimum regulatory requirements of statutory capital and surplus		11,400	11,400	9,800
Ordinary dividends that may be paid to parent company		$ 1,300	1,300
Actual dividends paid to parent company			$ 1,500	$ 1,800	$ 1,300
2023 Share Repurchase Authorization
Equity, Class of Treasury Stock [Line Items]
Remaining authorized amount								$ 824
Shares received (in shares)			1.7
Increase in treasury stock from share repurchases			$ 676
Stock repurchase average price (in dollars per share)			$ 390.30
2024 Share Repurchase Authorization
Equity, Class of Treasury Stock [Line Items]
Purchase Not to Exceed							$ 3,000
Shares received (in shares)			0.2
Increase in treasury stock from share repurchases			$ 74
Stock repurchase average price (in dollars per share)			$ 339.55
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Cash dividend declared (in dollars per share)	$ 0.885
Subsequent Event | 2024 Share Repurchase Authorization
Equity, Class of Treasury Stock [Line Items]
Remaining authorized amount						$ 2,900