Company's Debt (Detail) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Total Debt	$ 1,357.1	$ 1,352.0
Less: Current portion of long-term debt	0.6	0.4
Total long-term debt	1,356.5	1,351.6
Notes 5 Point 5 Percent Due 2014
Debt Instrument [Line Items]
Total Debt	459.9	458.0
Notes 8 Point 875 Percent Due 2019
Debt Instrument [Line Items]
Total Debt	496.9	496.7
Debentures 7 Point 25 Percent Due 2025
Debt Instrument [Line Items]
Total Debt	100.0	100.0
Debentures 6 Point 5 Percent Due 2034
Debt Instrument [Line Items]
Total Debt	295.5	295.5
Debt, Other
Debt Instrument [Line Items]
Total Debt	$ 4.8	$ 1.8

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ 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 210.5-02.22)
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-Publisher SEC
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-Section 03
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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-Section 02
-Paragraph 20
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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-Paragraph 22
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-Name Accounting Standards Codification
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