Earnings Per Share (Tables)

6 Months Ended

Jun. 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		6 Months Ended		12 Months Ended
	June 30,		June 30,		June 30,
	2012	2011	2012	2011	2012	2011
	(in millions)
Weighted-average basic common shares outstanding	177.2	177.5	177.8	177.2	177.7	177.0
Potential number of shares issuable under the Company's LTSIP	1.1	1.3	1.1	1.5	1.2	2.0
Weighted-average diluted common shares outstanding	178.3	178.8	178.9	178.7	178.9	179.0