Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Schedule Of Weighted Average Number Of Shares Basic And Diluted

A reconciliation of the components of basic and diluted shares used in the EPS calculation follows:

	3 Months Ended		9 Months Ended		12 Months Ended
	September 30,		September 30,		September 30,
	2012	2011	2012	2011	2012	2011
	(in millions)
Weighted-average basic common shares outstanding	175.4	177.5	177.0	177.3	177.2	177.1
Potential number of shares issuable under the Company's LTSIP	1.1	1.4	1.1	1.4	1.1	1.7
Weighted-average diluted common shares outstanding	176.5	178.9	178.1	178.7	178.3	178.8