Commitments and Contingencies (Guarantees - Demerger and Divesture Obligations Narrative) (Details) - 266 months ended Dec. 31, 2021 € in Millions, $ in Millions	USD ($)	EUR (€)	USD ($)
Indemnification Agreements Hoechst [Member]
Loss Contingencies [Line Items]
Number of divestiture agreements		19	19
Indemnification floor amount | €		€ 250
Indemnification ceiling amount | €		€ 750
Indemnification percentage exceeding ceiling amount		33.33%	33.33%
Loss contingency accrual, carrying value, payments | $	$ 102
Indemnification percentage, other		33.33%	33.33%
Divestiture Agreements [Member]
Loss Contingencies [Line Items]
Guarantee obligations, maximum exposure | $			$ 116