Commitments and Contingencies (Schedule Of Unrecognized Purchase Obligations) (Details) $ in Millions	Mar. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2018	$ 125
2019	28
2020	1
Thereafter	0
Total purchase obligations	$ 154

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant