Other Income (Expense) (Tables)

9 Months Ended

Sep. 30, 2015

Other Income (Expense) [Abstract]

Other Income (Expense) [Table Text Block]

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Millions
AFUDC–Equity		$1.0		$2.1		$2.6		$5.9
Gain on Sale of Available-for-sale Securities	—		—		0.1		0.2
Investments and Other Income (Expense)	0.7		—		0.8		(0.1		)
Total Other Income		$1.7		$2.1		$3.5		$6.0