Subsequent Event (Details) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2013	Dec. 31, 2012 Transitions Optical Business [Member]	Jun. 30, 2013 Transitions Optical Business [Member]
Subsequent Event [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			51.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			49.00%
Enterprise value of disposal group	$ 3,400,000,000
Proceed from separation of business	1,730,000,000
After-tax proceeds from divestiture of business	1,500,000,000
Disposal Group, Including Discontinued Operation, Revenue		$ 800,000,000

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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