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Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2013

Accounts Receivable, Net, Current [Abstract]

Schedule of Accounts Receivable

RECEIVABLES

	December 31,
	2013				2012
	(millions)
Accounts Receivable:
Utility customers	$	129.3			$	118.3
DOE pro-rata share of RD&D Program funding	20.1				4.4
Contract services, primarily DOE:
Billed revenue	15.7				12.6
Unbilled revenue	1.9				1.6
Contract services, primarily DOE	17.6				14.2
Accounts receivable, gross	167.0				136.9
Less: valuation allowances and allowances for doubtful accounts	4.0				2.1
Accounts receivable, net	$	163.0			$	134.8
DOE Receivables included in Other Long-Term Assets:
DOE long-term receivables, gross	$	80.8			$	38.0
Less: valuation allowances and allowances for doubtful accounts	$	55.0			12.2
DOE long-term receivables, net	$	25.8			$	25.8

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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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