Segment and Geographic Information Schedule of Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues from External Customers
Revenues	$ 3,104	$ 3,297	$ 9,793	$ 9,903
UNITED STATES
Revenues from External Customers
Revenues	1,612	1,671	5,109	5,026
UNITED KINGDOM
Revenues from External Customers
Revenues	375	428	1,193	1,253
GERMANY
Revenues from External Customers
Revenues	369	414	1,145	1,221
Other countries
Revenues from External Customers
Revenues	$ 748	$ 784	$ 2,346	$ 2,403