Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

The following is a reconciliation of basic shares to diluted shares:

	Years Ended December 31,
(in millions)	2014	2013	2012
Weighted-average shares - basic	170.6	156.6	145.1
Effect of dilutive securities	2.2	2.1	0.7
Weighted-average shares - diluted	172.8	158.7	145.8