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Notes Payable (Scheduled Repayments On Outstanding Debt) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2011
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Debt Instrument [Line Items] |  |
2012 | $ 294.2 |
2013 | 228.0 |
2014 | 11.0 |
2015 | 252.4 |
2016 | 2.6 | [1]
2017 and thereafter | 1,643.9 |
Total notes payable | $ 2,432.1 |
Weighted Average Interest Rate | 4.80% |
Maturities Due In 2012 [Member] |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate | 5.20% |
Maturities Due In 2013 [Member] |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate | 5.40% |
Maturities Due In 2014 [Member] |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate | 6.00% |
Maturities Due In 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Weighted Average Interest Rate | 5.10% |
Maturities Due In 2016 And Thereafter [Member] |  |
Debt Instrument [Line Items] |  |
2017 and thereafter, Weighted Average Interest Rate | 4.60% |
[1] | Includes only scheduled principal amortizations.

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- Definition 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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