Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

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

	3 Months Ended		12 Months Ended
	March 31,		March 31,
	2014	2013	2014	2013
	(in millions)
Weighted-average basic common shares outstanding	175.7	175.3	175.6	175.6
Potential number of shares issuable under the Company's LTSIP	0.4	0.8	0.5	0.9
Weighted-average diluted common shares outstanding	176.1	176.1	176.1	176.5