v2.4.0.6

Short-Term Investments (Tables)

6 Months Ended

Jun. 30, 2012

Short-Term Investments [Abstract]

Components Of Short-Term Investments

	June 30, 2012	December 31, 2011
	(In millions)
Canadian treasury, agency and provincial securities...............................	$ 644	$ 1,155
U.S. treasuries...................................................................................................	300	201
Other..................................................................................................................	—	147
Short-term investments...............................................................................	$ 944	$ 1,503

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- Definition

A table of investments, shown as a text block.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 6

-Section 10

-Paragraph (c)

-Subparagraph (1)

+ Details

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Namespace Prefix:	invest_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_ShortTermInvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration