Commitments and Contingencies (Guarantees - Demerger and Divesture Obligations Narrative) (Details) - 269 months ended Mar. 31, 2022 € in Millions, $ in Millions	USD ($)	EUR (€)	USD ($)
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 | $	$ 103
Indemnification percentage, other		33.33%	33.33%
Divestiture Agreements
Loss Contingencies [Line Items]
Guarantor obligations, maximum exposure | $			$ 116