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Business Divestitures and Assets and Liabilities Held for Sale - Narrative (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	May 09, 2025	May 01, 2025	Apr. 01, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Jun. 30, 2025	Mar. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of assets to be disposed of				$ 0	$ 282	$ 0	$ 282
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Pharma Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from the buyer		$ 2,564
Maximum earnout consideration receivable		250
Total assets		$ 2,742
Gain (loss) on disposal				91		91
Loss recognized on assets-held-for-sale										$ (337)
Tax effect of gain (loss) on divestiture								$ 70	$ 81
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Nitrocellulose
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from the buyer	$ 161
Total assets	$ 253
Gain (loss) on disposal				(10)		(10)
Tax effect of gain (loss) on divestiture				1		1
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Tobacco Flavoring Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from the buyer			$ 20
Gain (loss) on disposal				(1)		(1)
Tax effect of gain (loss) on divestiture				$ 5		$ 5

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