Subsequent Events Subsequent Events (Details) (Subsequent Event [Member], Ultra Pure Chemicals [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
Apr. 29, 2013	Dec. 31, 2012
Subsequent Event [Member] \| Ultra Pure Chemicals [Member]
Subsequent Event [Line Items]
Agreed Upon Proceeds From Divestiture From Business Subject To Close	$ 60
Revenue, Net		$ 94

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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