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Commitments and Contingent Liabilities - Litigation - Memorandum of Understanding (MOU) with DuPont, Corteva and EID (Details) - USD ($) $ in Millions	1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jan. 31, 2021	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2025	Sep. 30, 2024
Loss Contingencies [Line Items]
Aggregate amount of qualified spend			$ 4,000
Available amount after consideration for funding			1,300
Escrow deposit				$ 50		$ 50			$ 50
Outstanding amount in escrow account										$ 50
Loss contingency settlement agreement amount		$ 45
Amount received from settlement		$ 23
Gain within selling, general and administrative expense								$ 23
Insurance policy limit, amount			750
Chemours [Member]
Loss Contingencies [Line Items]
Expenditures subject to cost-sharing as qualified spend				$ 20	$ 38	40	$ 82
Memorandum of Understanding [Member]
Loss Contingencies [Line Items]
Aggregate amount of qualified spend			4,000
Memorandum of Understanding [Member] \| PFAS Insurance [Member]
Loss Contingencies [Line Items]
Payments due waived amount	$ 50
Escrow payment						$ 50
Memorandum of Understanding [Member] \| Minimum Balance on December 31, 2028 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Escrow deposit			700
Memorandum of Understanding [Member] \| Before January 2026 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Minimum settlement amount required to allow withdrawals from escrow account			125
Memorandum of Understanding [Member] \| Starting in January 2026 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Minimum amount of qualified spend required to allow withdrawals from escrow account			$ 200
Memorandum of Understanding [Member] \| Chemours [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Percentage of escrow deposits contribution to restore escrow balance to 700			50.00%
Memorandum of Understanding [Member] \| Chemours [Member] \| PFAS Insurance [Member]
Loss Contingencies [Line Items]
Escrow deposit	$ 150
Percentage of escrow deposits contribution to receive from other parties	100.00%
Percentage of share to insurance recoveries	50.00%
Fee paid from receipt of additional insurance proceeds	$ 3
Percentage of spread on variable rate interest paid from receipt of additional insurance proceeds	2.00%
Unrecovered fraction insurance proceeds from legal settlements	$ 150
Memorandum of Understanding [Member] \| Chemours [Member] \| PFAS Insurance [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Insurance proceeds	300
Fee paid from receipt of additional insurance proceeds	$ 35
Memorandum of Understanding [Member] \| Chemours [Member] \| No Later Than Each of September 30, 2021 and September 30, 2022 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Escrow deposit			$ 100
Memorandum of Understanding [Member] \| Chemours [Member] \| No Later Than September 30 of Each Subsequent Year Through and Including 2028 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Escrow deposit			$ 50
Memorandum of Understanding [Member] \| DuPont and Corteva [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Percentage of escrow deposits contribution to restore escrow balance to 700			50.00%
Memorandum of Understanding [Member] \| DuPont and Corteva [Member] \| No Later Than Each of September 30, 2021 and September 30, 2022 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Escrow deposit			$ 100
Memorandum of Understanding [Member] \| DuPont and Corteva [Member] \| No Later Than September 30 of Each Subsequent Year Through and Including 2028 [Member] \| PFAS Liabilities [Member]
Loss Contingencies [Line Items]
Escrow deposit			$ 50