Fair Value (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Short term investments	$ 20.5	$ 18.0
Healthcare trust assets	40.3	0
Carrying Amount [Member]
Cash and cash equivalents	1,276.4	1,245.1
Available-for-sale securities	1.9	1.8
Grantor trust cash and cash equivalents	0.2	0.7
Short term investments	20.5	18.0
Cash surrender value of supplemental life insurance	41.6	41.9
Healthcare trust assets	40.3	0
Debt maturing within one year	952.4	849.3
Long-term debt, net of related discount or premium	2,581.1	2,459.1
Foreign exchange forward contracts	(2.2)	(4.9)
Interest-rate swap agreements	100.4	147.6
Fair Value [Member]
Cash and cash equivalents	1,276.4	1,245.1
Available-for-sale securities	1.9	1.8
Grantor trust cash and cash equivalents	0.2	0.7
Short term investments	20.5	18.0
Cash surrender value of supplemental life insurance	41.6	41.9
Healthcare trust assets	40.3	0
Debt maturing within one year	960.2	849.3
Long-term debt, net of related discount or premium	2,458.1	2,445.2
Foreign exchange forward contracts	(2.2)	(4.9)
Interest-rate swap agreements	$ 100.4	$ 147.6

Grantor Trust Cash And Cash Equivalents Fair Value Disclosure

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- Definition

Long Term Debt Net Of Related Discount Or Premium Fair Value Disclosure

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (b)

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-Glossary Available-for-Sale Securities

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 8

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-Name Accounting Standards Codification

-Glossary Cash

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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-Publisher FASB

-Name FASB Technical Bulletin (FTB)

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- Definition

The portion of trust fund assets classified as current assets because they are expected to be liquidated to pay current liabilities as of the balance sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 954

-SubTopic 810

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-Paragraph 4

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-Name Audit and Accounting Guide (AAG)

-Number AAG-HCO

-Paragraph 21, 22, 23

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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