CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Registered Shares	Treasury Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non- Controlling Interests
Beginning balance at Dec. 31, 2023	$ 1
Increase (Decrease) in Temporary Equity
Net income (loss)	(1)
Capital contribution (return) from (to) noncontrolling interest	2
Ending balance at Sep. 30, 2024	2
Beginning balance (in shares) at Dec. 31, 2023		145,319,668
Beginning balance (in shares) at Dec. 31, 2023			16,109,804
Beginning balance at Dec. 31, 2023	11,814	$ 1	$ (1,073)	$ 5,900	$ 12,077	$ (6,054)	$ 963
Increase (Decrease) in Stockholders' Equity
Net income (loss)	559				535		24
Other comprehensive income (loss)	(303)					(300)	(3)
Dividends on registered shares/common shares	(380)				(380)
Dividends to noncontrolling interests on subsidiary common stock	(4)						(4)
Capital contribution (return) from (to) noncontrolling interest	39			(2)			41
Share-based compensation expense and conversions	49			49
Repurchase of registered shares (in shares)		(6,440,930)	6,440,930
Repurchase of registered shares	(600)		$ (600)
Issuance of registered shares, including stock dividends (in shares)		746,276	(746,276)
Issuance of registered shares, including stock dividends	(18)		$ 49	(66)	(1)
Ending balance (in shares) at Sep. 30, 2024		139,625,014
Ending balance (in shares) at Sep. 30, 2024			21,804,458
Ending balance at Sep. 30, 2024	11,156	$ 1	$ (1,624)	5,881	12,231	(6,354)	1,021
Beginning balance at Jun. 30, 2024	1
Increase (Decrease) in Temporary Equity
Net income (loss)	(1)
Capital contribution (return) from (to) noncontrolling interest	2
Ending balance at Sep. 30, 2024	2
Beginning balance (in shares) at Jun. 30, 2024		141,641,323
Beginning balance (in shares) at Jun. 30, 2024			19,788,149
Beginning balance at Jun. 30, 2024	10,984	$ 1	$ (1,427)	5,869	12,005	(6,446)	982
Increase (Decrease) in Stockholders' Equity
Net income (loss)	234				221		13
Other comprehensive income (loss)	109					92	17
Dividends on registered shares	5				5
Dividends to noncontrolling interests on subsidiary common stock	(1)						(1)
Capital contribution (return) from (to) noncontrolling interest	8			(2)			10
Share-based compensation expense and conversions	15			15
Repurchase of registered shares (in shares)		(2,063,956)	2,063,956
Repurchase of registered shares	(200)		$ (200)
Issuance of registered shares, including stock dividends (in shares)		47,647	(47,647)
Issuance of registered shares, including stock dividends	2		$ 3	(1)	0
Ending balance (in shares) at Sep. 30, 2024		139,625,014
Ending balance (in shares) at Sep. 30, 2024			21,804,458
Ending balance at Sep. 30, 2024	11,156	$ 1	$ (1,624)	5,881	12,231	(6,354)	1,021
Beginning balance at Dec. 31, 2024	4
Increase (Decrease) in Temporary Equity
Net income (loss)	7
Other comprehensive income (loss)	4
Sale of redeemable noncontrolling interest (Note 2)	46
Ending balance at Sep. 30, 2025	$ 61
Beginning balance (in shares) at Dec. 31, 2024		133,964,235
Beginning balance (in shares) at Dec. 31, 2024	21,318,307		21,318,307
Beginning balance at Dec. 31, 2024	$ 10,945	$ 1	$ (1,549)	5,325	12,838	(6,702)	1,032
Increase (Decrease) in Stockholders' Equity
Net income (loss)	748				721		27
Other comprehensive income (loss)	574					544	30
Dividends on registered shares/common shares	(502)				(502)
Dividends to noncontrolling interests on subsidiary common stock	(9)						(9)
Capital contribution (return) from (to) noncontrolling interest	30						30
Acquisition of a business (Note 2) (in shares)		65,611,831
Acquisition of a business (Note 2)	5,781	$ 1		5,339			441
Sale of redeemable noncontrolling interest (Note 2)	240			189		51
Acquisition of noncontrolling interest (Note 8)	(85)			4			(89)
Share-based compensation expense and conversions	67			67
Repurchase of registered shares (in shares)		(6,672,777)	6,672,777
Repurchase of registered shares	(545)		$ (545)
Issuance of registered shares, including stock dividends (in shares)		509,058	(509,058)
Issuance of registered shares, including stock dividends	$ (14)		$ 43	(53)	(4)
Ending balance (in shares) at Sep. 30, 2025		193,412,347
Ending balance (in shares) at Sep. 30, 2025	27,482,026		27,482,026
Ending balance at Sep. 30, 2025	$ 17,230	$ 2	$ (2,051)	10,871	13,053	(6,107)	1,462
Beginning balance at Jun. 30, 2025	61
Ending balance at Sep. 30, 2025	61
Beginning balance (in shares) at Jun. 30, 2025		134,434,752
Beginning balance (in shares) at Jun. 30, 2025			20,847,790
Beginning balance at Jun. 30, 2025	11,895	$ 1	$ (1,508)	5,502	13,011	(6,123)	1,012
Increase (Decrease) in Stockholders' Equity
Net income (loss)	181				166		15
Other comprehensive income (loss)	15					16	(1)
Dividends on registered shares/common shares	(125)				(125)
Dividends to noncontrolling interests on subsidiary common stock	(5)						(5)
Acquisition of a business (Note 2) (in shares)		65,611,831
Acquisition of a business (Note 2)	5,781	$ 1		5,339			441
Share-based compensation expense and conversions	32			32
Repurchase of registered shares (in shares)		(6,672,777)	6,672,777
Repurchase of registered shares	(545)		$ (545)
Issuance of registered shares, including stock dividends (in shares)		38,541	(38,541)
Issuance of registered shares, including stock dividends	$ 1		$ 2	(2)	1
Ending balance (in shares) at Sep. 30, 2025		193,412,347
Ending balance (in shares) at Sep. 30, 2025	27,482,026		27,482,026
Ending balance at Sep. 30, 2025	$ 17,230	$ 2	$ (2,051)	$ 10,871	$ 13,053	$ (6,107)	$ 1,462