Debt (Tables)

6 Months Ended

Jun. 30, 2011

Debt [Abstract]

Short-term and long-term debt outstanding

	June 30,		December 31,		June 30,
	2011		2010		2010
5.375% Senior Notes, due 2012 1	$	399.9	$	399.9	$	399.8
5.9% Senior Notes, due 2017 2		399.4		399.3		399.3
6.55% Senior Notes, due 2037 3		398.6		398.6		398.6
Note payable		0.1		0.5		0.2
Total debt		1,198.0		1,198.3		1,197.9
Less: short-term debt including current maturities		—		0.3		—
Long-term debt	$	1,198.0	$	1,198.0	$	1,197.9

1	Interest payments are due on February 15 and August 15, and, as of June 30, 2011, the unamortized debt discount is $0.1 million
2	Interest payments are due on April 15 and October 15, and, as of June 30, 2011, the unamortized debt discount is $0.6 million
3	Interest payments are due on May 15 and November 15, and, as of June 30, 2011, the unamortized debt discount is $1.4 million