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Debt and Credit Arrangements (Tables)
 3 Months Ended
Mar. 31, 2014
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,
2014
 
December 31,
2013
Book
Value
 
Fair
Value 1
 
Book
Value
 
Fair
Value 1
6.25% Senior Unsecured Notes due 2014 (less unamortized
discount of $0.1)
6.29%
 
$
350.9

 
$
361.6

 
$
351.3

 
$
365.6

2.25% Senior Notes due 2017 (less unamortized
discount of $0.5)
2.30%
 
299.5

 
302.3

 
299.4

 
293.0

4.00% Senior Notes due 2022 (less unamortized
discount of $2.5)
4.13%
 
247.5

 
249.0

 
247.4

 
241.6

3.75% Senior Notes due 2023 (less unamortized
discount of $1.3)
4.32%
 
498.7

 
485.7

 
498.6

 
467.3

Other notes payable and capitalized leases
 
 
87.3

 
89.5

 
86.7

 
87.8

Total long-term debt
 
 
1,483.9

 
 
 
1,483.4

 
 
Less: current portion 2
 
 
353.2
 
 
 
353.6

 
 
Long-term debt, excluding current portion
 
 
$
1,130.7

 
 
 
$
1,129.8

 
 

1 
See Note 12 for information on the fair value measurement of our long-term debt.
2 
We included our 6.25% Senior Unsecured Notes due 2014 (the "6.25% Notes") in the current portion of long-term debt on our March 31, 2014 unaudited Consolidated Balance Sheet and December 31, 2013 Consolidated Balance Sheet because the 6.25% Notes were scheduled to mature on November 15, 2014. See Note 15 for information regarding subsequent events.