Commitments and Contingencies - Narrative (Details) - 287 months ended Sep. 30, 2023 € in Millions, $ in Millions	USD ($)	EUR (€)	USD ($)
Loss Contingencies [Line Items]
Unrecorded unconditional purchase obligations			$ 3,900
Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year			172
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One			635
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two			555
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three			436
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four			$ 353
Indemnification Agreements Hoechst
Loss Contingencies [Line Items]
Number of divestiture agreements		19	19
Indemnification amount | €		€ 250
Indemnification ceiling amount | €		€ 750
Indemnification percentage exceeding ceiling amount		33.33%	33.33%
Loss contingency accrual, carrying value, payments	$ 110
Indemnification percentage, other		33.33%	33.33%
Divestiture Agreements
Loss Contingencies [Line Items]
Guarantor obligations, maximum exposure			$ 116