Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Future Amortization Of Acquisition-Related Intangibles) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Mar. 31, 2017	[1]
Goodwill and Intangible Assets Disclosure [Abstract]
2018 (remaining nine months)	$ 5
2019	2
Total	$ 7	$ 8

[1] Derived from audited Consolidated Financial Statements.