CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (USD $) In Millions	Total	Common shareholders' equity	Common shares and paid-in surplus	Retained earnings	Accum. other comprehensive (loss) income, after tax	Noncontrolling interests, after tax
Balances at Dec. 31, 2009		$ 1,429.0	$ 1,009.7	$ 425.5	$ (6.2)	$ 19.1
Increase (Decrease) in Shareholders' Equity
Net income	97.0	95.4		95.4		1.6
Amortization of restricted share and option awards		0.7	0.7
Issuance of common shares		0.4	0.4			0.3
Repurchases and retirements of common shares		(10.5)	(10.5)
Dividends		(295.8)		(295.8)		(0.7)
Contributions						0.5
Distributions						(1.0)
Other comprehensive income, after tax	(0.1)	(0.1)			(0.1)
Balances at Sep. 30, 2010		1,219.1	1,000.3	225.1	(6.3)	19.8
Balances at Dec. 31, 2010	1,248.9	1,229.0	1,000.5	228.2	0.3	19.9
Increase (Decrease) in Shareholders' Equity
Net income	25.6	24.5		24.5		1.1
Amortization of restricted share and option awards		0.9	0.9
Issuance of common shares		0.3	0.3			0.3
Repurchases and retirements of common shares						(1.3)
Dividends		(154.8)		(154.8)		(0.9)
Contributions						0.1
Distributions						(5.0)
Other comprehensive income, after tax	0.3	0.3			0.3
Balances at Sep. 30, 2011	$ 1,114.4	$ 1,100.2	$ 1,001.7	$ 97.9	$ 0.6	$ 14.2