|
Senior Long-Term Debt (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|---|
|
Sep. 30, 2012
4.90% Unsecured Senior Notes [Member]
July 2, 2012 Issuance Of 4.90% Unsecured Senior Notes [Member]
|
Jul. 02, 2012
4.90% Unsecured Senior Notes [Member]
July 2, 2012 Issuance Of 4.90% Unsecured Senior Notes [Member]
|
Sep. 30, 2012
7.50% Unsecured Senior Debentures [Member]
August 1, 2012 Redemption Of 7.50% Unsecured Senior Debentures [Member]
|
Sep. 30, 2012
7.50% Unsecured Senior Debentures [Member]
August 1, 2012 Redemption Of 7.50% Unsecured Senior Debentures [Member]
|
Sep. 30, 2012
6.80% Unsecured Senior Notes [Member]
|
|
| Debt Instrument [Line Items] | |||||
| Debt instrument, face amount | $ 350 | $ 150 | $ 150 | ||
| Debt instrument, interest rate, stated percentage | 4.90% | 7.50% | 7.50% | 6.80% | |
| Proceeds from issuance of unsecured debt | 347.2 | ||||
| Debt instrument, redemption price, percentage of face amount | 100.00% | 100.00% | |||
| Loss on extinguishment of debt | (4.1) | (4.1) | |||
| Debt instrument, principal amount outstanding | $ 246.7 |