Certain Balance Sheet Components (Narrative) (Details) $ in Millions		3 Months Ended
Apr. 21, 2016 USD ($) a	Jun. 30, 2016 USD ($) a
Timber And Timberlands [Line Items]
Acres sold through timberland sale \| a	172,000	172,000
Land Sales	$ 114.0	$ 114.0
Real Estate [Member]
Timber And Timberlands [Line Items]
Net loss		$ 48.5

This element represents the amount of gain (loss) on sale of properties during the reporting period gross of the applicable income taxes realized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 974
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-15.(a)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6875705&loc=d3e641549-123027

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