Employee Benefit Plans (Narrative) (Details)	Sep. 01, 2017
Alkali Business [Member] \| Alkali Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Period of credited service required by benefit plan	1 year

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration