Segment and Geographic Area Information - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets
Total long-lived assets	$ 5,110	$ 5,248
United States and Puerto Rico
Revenues from External Customers and Long-Lived Assets
Total long-lived assets	3,369	3,354
Europe
Revenues from External Customers and Long-Lived Assets
Total long-lived assets	1,400	1,534
All other
Revenues from External Customers and Long-Lived Assets
Total long-lived assets	$ 341	$ 360