The estimated maximum amount of possible loss from the contingency.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Name:	us-gaap_LossContingencyRangeOfPossibleLossMaximum
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Commitments And Contingencies (European Commission Matters) (Details) In Millions, unless otherwise specified		1 Months Ended		1 Months Ended
	Jun. 30, 2010	Jul. 31, 2006 Italian Government [Member]	Nov. 19, 2009 Italian Government [Member] USD ($)	Jan. 31, 2007 Spanish Government [Member]	Jan. 31, 2007 Tariffs Granted by Spain [Member] USD ($)	Jan. 31, 2007 Tariffs Granted by Spain [Member] EUR (€)
Number of years operating under a power supply structured		10		9
Italian government extended tariff charge, minimum			$ 300
Italian government extended tariff charge, maximum			500
Charge related to EC announcement			250
Write off of receivable			20
Amount of curtailment, in kmt-per-year	44
Days provided to submit observations and comments to the EC					30	30
Loss contingency, range of possible loss, maximum					$ 100	€ 70