Geographic Information Net Property by Country (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	$ 4,396	$ 4,546	$ 4,544
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	3,014	3,069	3,161
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	122	125	88
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	601	566	546
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	510	608	568
Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Property	$ 149	$ 178	$ 181