Segment Information (Long-Lived Assets By Geographic Area) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 550	$ 491
North America Segment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	446	397
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 104	$ 94