Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Debt consisted of the following at December 31,

(dollars in millions)	2014		2013
Commercial paper payable through 2015	$	317.3	$	240.5
Notes payable in 2014, at an interest rate of 5.65% less unamortized discount of $0.0 and $0.1, respectively	—		399.9
Notes payable in 2019, at an interest rate of 6.8% less unamortized discount of $0.6 and $0.7, respectively	399.4		399.3
Notes payable in 2021, at an interest rate of 4.5% includes $1.0 and ($20.2) fair value of interest rate swap, respectively, less unamortized discount of $1.8 and $2.0, respectively	399.2		377.8
Notes payable in 2022	200.0		—
Debt of subsidiary companies	—		3.9
Obligations under capital leases	—		0.2
Total debt	1,315.9		1,421.6
Less current portion	—		0.2
Total long-term debt	$	1,315.9	$	1,421.4