Business Combination (Tables)

6 Months Ended

Jun. 30, 2012

Business Combinations [Abstract]

Schedule of Purchase Price Allocation [Table Text Block]

$ in millions	Current purchase price allocation			Preliminary purchase price allocation
Cash	$	116.4		$	116.4
Accounts receivable		277.6			277.6
Inventory		123.7			123.7
Other current assets		41.0			41.0
Property, plant and equipment		2,434.4			2,548.5
Intangible assets subject to amortization		170.2			166.3
Intangible assets - indefinite-lived		5.0			5.0
Regulatory assets		201.7			201.1
Other non-current assets		58.3			58.3
Current liabilities		(400.1	)		(400.2	)
Debt		(1,255.1	)		(1,255.1	)
Deferred taxes		(519.3	)		(558.2	)
Regulatory liabilities		(117.0	)		(117.0	)
Other non-current liabilities		(193.9	)		(194.7	)
Redeemable preferred stock		(18.4	)		(18.4	)
Net identifiable assets acquired		924.5			994.3
Goodwill		2,559.1			2,489.3
Net assets acquired	$	3,483.6		$	3,483.6