Pension Benefits (Narrative) (Details) - Pension Benefits [Member] $ in Millions	12 Months Ended
Jun. 30, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Minimum length of investment horizon (in years)	10 years
Estimated employer contributions to pension plans in next fiscal year - not expected to be material	$ 0.0

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration