Pensions FV Assets Level 3 Reconciliation (Details) (Domestic Pension Benefits, USD $) In Millions						12 Months Ended			12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2010 Private Equity Funds [Member]	Dec. 31, 2009 Private Equity Funds [Member]	Dec. 31, 2010 Private Equity Funds [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2009 Private Equity Funds [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 Alternative Investments [Member]	Dec. 31, 2009 Alternative Investments [Member]	Dec. 31, 2010 Alternative Investments [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2009 Alternative Investments [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2009 Significant Unobservable Inputs (Level 3) [Member]
Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	$ 362.5	$ 347.1	$ 292.0	$ 13.0	$ 14.8	$ 14.8	$ 15.4	$ 0.1	$ 0.9	$ 0.9	$ 14.5	$ 15.7	$ 29.9
Actual return on plan assets held at reporting date						(2.0)	(1.4)			0.1	0.4	(1.9)	(1.0)
Actual return on plan assets sold/distributed during period						2.3	0.1			0.2	0	2.5	0.1
Purchases, capital contributions, sales and settlements						(2.1)	0.7			(1.1)	(14.0)	(3.2)	(13.3)
Fair Value of Plan Assets at End of Year	$ 362.5	$ 347.1	$ 292.0	$ 13.0	$ 14.8	$ 13.0	$ 14.8	$ 0.1	$ 0.9	$ 0.1	$ 0.9	$ 13.1	$ 15.7

Actual return on plan assets, separately identifying the amount related to assets sold during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)

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- Definition

Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49

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- Definition

Purchases, sales, and settlements of plan assets that occurred during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(ii)

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