Segment Information, Geographic And Product Data (Narrative) (Details) (USD $)	12 Months Ended
Jun. 30, 2009	Jun. 30, 2011 Precision Castparts Corporation [Member]	Jun. 30, 2010 Precision Castparts Corporation [Member]
Sales from major customer accounted for more than 10%	$ 0	$ 161,700,000	$ 116,100,000
Number of customers accounted for sales more than 10%		1	1

Amount of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 39

Name:	us-gaap_EntityWideRevenueMajorCustomerAmount
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration