Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 3,707	$ 4,141
United States
Disaggregation of Revenue [Line Items]
Revenues	1,131	1,209
United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	473	602
Other Europe
Disaggregation of Revenue [Line Items]
Revenues	1,138	1,305
Australia
Disaggregation of Revenue [Line Items]
Revenues	391	401
Other International
Disaggregation of Revenue [Line Items]
Revenues	$ 574	$ 624