Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2016

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		6 Months Ended		12 Months Ended
	June 30,		June 30,		June 30,
	2016	2015	2016	2015	2016	2015
	(in millions)
Weighted-average basic common shares outstanding	176.0	176.4	175.9	176.3	175.9	176.1
Potential number of shares issuable under the Company's LTSIP	0.2	0.2	0.3	0.2	0.2	0.3
Weighted-average diluted common shares outstanding	176.2	176.6	176.2	176.5	176.1	176.4