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Debt and Credit Arrangements (Tables)
 3 Months Ended
Mar. 31, 2013
Debt and Credit Arrangements [Abstract]  
Summary of Carrying Amounts and Fair Values of Long-term Debt
A summary of the carrying amounts and fair values of our long-term debt is listed below.
 
Effective
Interest Rate
 
March 31,
2013
 
December 31,
2012
Book
Value
 
Fair
Value 1
 
Book
Value
 
Fair
Value 1
6.25% Senior Unsecured Notes due 2014 (less unamortized
discount of $0.2)
6.29%
 
$
352.4

 
$
376.8

 
$
352.8

 
$
372.6

10.00% Senior Unsecured Notes due 2017 (less unamortized
discount of $7.7)
10.38%
 
592.3

 
642.8

 
591.9

 
660.8

2.25% Senior Notes due 2017 (less unamortized
discount of $0.7)
2.30%
 
299.3

 
299.0

 
299.3

 
297.8

4.00% Senior Notes due 2022 (less unamortized
discount of $2.8)
4.13%
 
247.2

 
252.4

 
247.1

 
258.7

3.75% Senior Notes due 2023 (less unamortized
discount of $1.5)
4.32%
 
498.5

 
482.9

 
498.5

 
499.7

4.75% Convertible Senior Notes due 2023

 
0.0

 
0.0

 
200.5

 
202.8

Other notes payable and capitalized leases
 
 
83.8

 
83.9

 
87.3

 
90.8

Total long-term debt
 
 
2,073.5

 
 
 
2,277.4

 
 
Less: current portion 2
 
 
1.9

 
 
 
216.6

 
 
Long-term debt, excluding current portion
 
 
$
2,071.6

 
 
 
$
2,060.8

 
 
 
1 
See Note 11 for information on the fair value measurement of our long-term debt.
2 
We included our 4.75% Convertible Senior Notes due 2023 (the “4.75% Notes”) in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet because holders of the 4.75% Notes had a repurchase option for cash, stock or a combination, at our election, at par on March 15, 2013. The 4.75% Notes were retired in the first quarter of 2013.