Debt and Credit Arrangements (Tables)

6 Months Ended

Jun. 30, 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	June 30, 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 $0.1)	6.29%	$	352.0	$	371.0	$	352.8	$	372.6
10.00% Senior Unsecured Notes due 2017 (less unamortized discount of $7.4 )	10.38%	592.6		630.8		591.9		660.8
2.25% Senior Notes due 2017 (less unamortized discount of $0.6)	2.30%	299.4		293.5		299.3		297.8
4.00% Senior Notes due 2022 (less unamortized discount of $2.7)	4.13%	247.3		241.0		247.1		258.7
3.75% Senior Notes due 2023 (less unamortized discount of $1.4)	4.32%	498.6		464.2		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		83.5		81.6		87.3		90.8
Total long-term debt		2,073.4				2,277.4
Less: current portion 2		594.8				216.6
Long-term debt, excluding current portion		$	1,478.6			$	2,060.8

¹  See Note 11 for information on the fair value measurement of our long-term debt.

²  In June 2013, we exercised our option to redeem all of the 10.00% Senior Unsecured Notes due 2017 (the "10.00% Notes") on July 15, 2013, as such, we included our 10.00% Notes in the current portion of long-term debt on our June 30, 2013 unaudited Consolidated Balance Sheet. 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 an option to require us to repurchase their Notes 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.