Revision of Previously Issued Financial Statements - Impacts to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ 41			$ 59					$ (390)	$ 327
Deferred Income taxes									(213)	(143)
Loss on assets classified as held for sale									108	284
Losses (gains) on business disposals	$ 0			20					111	(348)
Other assets/liabilities, net									(77)	(112)
Net cash provided by operating activities									532	681
Cash received on foreign currency forward contracts									131	21
Net cash provided by investing activities									$ 2,426	607
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		$ 612	$ (46)	60	$ 172	$ 61	$ (405)	$ 233		293	$ 247	$ (2,563)
Deferred Income taxes							(163)			(128)	(304)	(369)
Loss on assets classified as held for sale							0			314	347	0
Losses (gains) on business disposals		81					81			0
Other assets/liabilities, net							26			(102)	(94)	(102)
Net cash provided by operating activities							368			702	1,070	1,439
Cash paid on foreign currency forward contracts											(102)	0
Cash received on foreign currency forward contracts							112			0
Net cash provided by investing activities							2,541			586	326	574
Measurement period adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		(26)	(14)	(1)	24	11	(26)	35		34	20	(24)
Deferred Income taxes							(1)			(15)	(19)	(2)
Loss on assets classified as held for sale							0			(30)	(30)	0
Losses (gains) on business disposals		30					30			0
Other assets/liabilities, net							(3)			(10)	29	42
Net cash provided by operating activities							0			(21)	0	16
Cash paid on foreign currency forward contracts											0	(16)
Cash received on foreign currency forward contracts							0			21
Net cash provided by investing activities							0			21	0	(16)
Revision Of Prior Period, Revised Amount
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)		586	$ (60)	$ 59	$ 196	$ 72	(431)	$ 268		327	267	(2,587)
Deferred Income taxes							(164)			(143)	(323)	(371)
Loss on assets classified as held for sale							0			284	317	0
Losses (gains) on business disposals		$ 111					111			0
Other assets/liabilities, net							23			(112)	(65)	(60)
Net cash provided by operating activities							368			681	1,070	1,455
Cash paid on foreign currency forward contracts											(102)	(16)
Cash received on foreign currency forward contracts							112			21
Net cash provided by investing activities							$ 2,541			$ 607	$ 326	$ 558