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Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2013

Accounts Receivable, Net, Current [Abstract]

Schedule of Accounts Receivable

	June 30, 2013				December 31, 2012
	(millions)
Utility customers	$	105.2			$	118.3
DOE pro-rata share of RD&D program funding	24.2				4.4
Contract services, primarily DOE:
Billed revenue	9.3				10.5
Unbilled revenue	2.2				1.6
	11.5				12.1
	$	140.9			$	134.8

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3,4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3, 4

-Article 5

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