Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 2,086
Accumulated Impairment, beginning balance	(368)
Goodwill, beginning balance	1,718	[1]
Goodwill acquired	3
Effects of foreign currency translation	3
Goodwill, period increase (decrease)	6
Goodwill, ending balance	2,092
Accumulated Impairment, ending balance	(368)
Goodwill, ending balance	$ 1,724

[1] Derived from audited consolidated financial statements.