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Notes Payable (Tables) | 3 Months Ended
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Mar. 31, 2012
Notes Payable [Abstract] |
Summary Of Indebtedness | The following is a summary of our indebtedness:
| Balance at
(in millions) | March 31, 2012 |  | December 31, 2011
Commercial Banks |  |  |
Unsecured line of credit and short-term borrowings | $ | — |  |  | $ | — |
Senior unsecured notes |  |  |
5.93% Notes, due 2012 | 189.6 |  |  | 189.6 |
5.45% Notes, due 2013 | 199.8 |  |  | 199.7 |
5.08% Notes, due 2015 | 249.4 |  |  | 249.3 |
5.75% Notes, due 2017 | 246.2 |  |  | 246.2 |
4.70% Notes, due 2021 | 248.6 |  |  | 248.6 |
5.00% Notes, due 2023 | 247.3 |  |  | 247.3 |
| 1,380.9 |  |  | 1,380.7 |
Total unsecured notes payable | 1,380.9 |  |  | 1,380.7 |
Secured notes |  |  |
0.89% – 6.00% Conventional Mortgage Notes, due 2012 – 2045 | 1,011.5 |  |  | 1,012.3 |
1.32% Tax-exempt Mortgage Note due 2028 | 38.7 |  |  | 39.1 |
| 1,050.2 |  |  | 1,051.4 |
Total notes payable | $ | 2,431.1 |  |  | $ | 2,432.1 |
Floating rate tax-exempt debt included in secured notes (1.32%) | $ | 38.7 |  |  | $ | 39.1 |
Floating rate debt included in secured notes (0.89% – 1.69%) | 206.5 |  |  | 206.4 |
Scheduled Repayments On Outstanding Debt | Scheduled repayments on outstanding debt including all contractual extensions which have been exercised, including our line of credit and scheduled principal amortizations, and the weighted average interest rate on maturing debt at March 31, 2012 were as follows:
(in millions) | Amount |  | Weighted Average Interest Rate
2012 | $ | 293.2 |  |  | 5.2 | %
2013 | 228.0 |  |  | 5.4 | %
2014 | 11.0 |  |  | 6.0 | %
2015 | 252.4 |  |  | 5.1 | %
2016 (1) | 2.6 |  |  | — | %
2017 and thereafter | 1,643.9 |  |  | 4.6 | %
Total | $ | 2,431.1 |  |  | 4.8 | %
(1) Includes only scheduled principal amortizations.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 9: 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 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 470 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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