Short-Term and Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Short-Term and Long-Term Debt [Table Text Block]

The following tables present the Company’s short-term and long-term debt as of September 30, 2018, and December 31, 2017:

September 30, 2018	Principal		Unamortized Debt Issuance Costs	Total
Millions
Short-Term Debt		$57.0	$(0.4)		$56.6
Long-Term Debt	1,470.9		(9.2)	1,461.7
Total Debt		$1,527.9	$(9.6)		$1,518.3

December 31, 2017	Principal		Unamortized Debt Issuance Costs	Total
Millions
Short-Term Debt		$64.6	$(0.5)		$64.1
Long-Term Debt	1,448.7		(9.5)	1,439.2
Total Debt		$1,513.3	$(10.0)		$1,503.3