Leases - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Feb. 01, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Remaining lease term	40 years
Option to extend lease term	5 years
Operating lease liability	$ 671		$ 265
Operating lease right-of-use assets	$ 774		$ 299
Nutrition & Biosciences, Inc
Lessee, Lease, Description [Line Items]
Operating lease liability		$ 519
Operating lease right-of-use assets		$ 519