Other Income (Expense) (Tables)

9 Months Ended

Sep. 30, 2013

Other Income (Expense) [Abstract]

Other Income (Expense) [Table Text Block]

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Millions
AFUDC – Equity		$1.2		$1.5		$3.4		$3.4
Gain on Sale of Available-for-sale Securities	1.4		—		2.2		—
Investments and Other Income	0.7		—		1.9		—
Total Other Income		$3.3		$1.5		$7.5		$3.4