Fair Value Of Financial Instruments (Schedule Of Changes In Level 3 Financial Assets) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Beginning balance,		$ 20.6
Net realized/unrealized gains/(losses)
Purchases/(sales)
Transfers in/(out) of Level 3		$ (20.6)

Amount of realized and unrealized gains, included in the income statement for the period, from certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) and which the entity has or had based its calculation of fair market value on unobservable inputs (Level 3).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnobservableInputRealizedAndUnrealizedGainsIncludedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration