Business Divestitures and Assets and Liabilities Held for Sale - Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 0	$ 2	$ 0	$ 2	$ 2	$ 26
Operating lease right-of-use assets	595		595		589
Impairment of goodwill	0	$ 0	1,153	$ 64	64
Disposal Group, Held-for-sale, Not Discontinued Operations | SCL Disposal Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	0		0
Trade receivables, net	16		16
Inventories	48		48
Property, plant and equipment, net	92		92
Goodwill	0		0
Other intangible assets, net	88		88
Operating lease right-of-use assets	7		7
Other assets	9		9
Loss recognized on assets-held-for-sale	(108)		(108)
Total assets	152		152
Accounts payable	35		35
Deferred tax liability	0		0
Other liabilities	9		9
Total liabilities	$ 44		$ 44
Disposal Group, Held-for-sale, Not Discontinued Operations | Pharma Solutions And Nitrocellulose Disposal Groups
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents					2
Trade receivables, net					187
Inventories					274
Property, plant and equipment, net					451
Goodwill					1,216
Other intangible assets, net					1,078
Operating lease right-of-use assets					57
Other assets					108
Loss recognized on assets-held-for-sale					(317)
Total assets					3,056
Accounts payable					90
Deferred tax liability					51
Other liabilities					191
Total liabilities					$ 332