Property, Plant, and Equipment (PP&E) - Long-lived Assets by Geographic Areas (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 14,882	$ 13,745
US [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	8,385	7,666
Developed Europe [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	5,094	4,775
Developed Rest Of World [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	347	413
Emerging Markets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 1,056	$ 890