v2.4.0.8

Long-Term Debt and Common Stock (Details)	1 Months Ended	2 Months Ended	6 Months Ended
	Feb. 13, 2013 USD ($)	Feb. 16, 2012 USD ($)	Jun. 30, 2013 Commercial Paper [Member] USD ($)	Jun. 30, 2013 Revolving Credit Agreement [Member] USD ($)	Jun. 30, 2013 Canadian Dollar Letter of Credit Due 2014 [Member] USD ($)	Jun. 30, 2013 Canadian Dollar Letter of Credit Due 2014 [Member] CAD	Jun. 30, 2013 Floating Rate Senior Notes due 2014 [Member] USD ($)	Jun. 30, 2013 4.75% Subsidiary Debt due 2014 [Member] USD ($)
Debt Instrument Issuance [Abstract]
Short-Term Debt, Refinanced Amount							$ 350,000,000	$ 150,000,000
Debt Instrument Issuance Interest Rate								4.75%
Line of Credit Facility [Line Items]
Average Borrowings Outstanding			21,000,000
Weighted average interest rate (in hundredths)			0.31%
Line of Credit Facility, Expiration Date				Oct. 11, 2016	May 29, 2018	May 29, 2018
Restricted Cash					52,000,000	55,000,000
Maximum borrowing capacity				2,000,000,000		160,000,000
Eurodollar rate at period end (in hundredths)				1.07%
Base rate at period end (in hundredths)				3.25%
Quarterly Cash Dividends Common Stock per Share	$ 0.1875	$ 0.17

X

- Definition

The effective base interest rate at the end of the reporting period.

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No definition available.

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- Definition

The effective Eurodollar interest rate at the end of the reporting period.

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No definition available.

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- Definition

Reflects the calculation for the reporting period of the average interest rate on comemrcial paper weighted by the amount of commercial paper outstanding for varing time periods during the period.

+ References

No definition available.

+ Details

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- Definition

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-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.



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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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-Number AAG-BRD

-Paragraph 80

-Subparagraph Exhibit 4-8, 3

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-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.



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- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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No definition available.

+ Details

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- Definition

Amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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.



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