Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

Our weighted-average shares outstanding for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,		Nine Months Ended September 30,
(in millions)	2018	2017	2018	2017
Weighted-average number of shares of common stock outstanding - basic	103.8	108.1	105.6	108.6
Stock options	1.1	1.1	1.1	1.3
Restricted stock units	1.0	1.1	1.2	1.6
Weighted-average shares and assumed conversions - diluted	105.9	110.3	107.9	111.5