COMMON EQUITY (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Schedule of stock-based compensation awards granted

During the first quarter of 2017, the Compensation Committee of our Board of Directors awarded the following stock-based compensation awards to our directors, officers, and certain other key employees:

Award Type	Number of Awards
Stock options (1)	552,215
Restricted shares (2)	82,622
Performance units	237,650

⁽¹⁾  Stock options awarded had a weighted-average exercise price of $58.31 and a weighted-average grant date fair value of $7.45 per option.

⁽²⁾  Restricted shares awarded had a weighted-average grant date fair value of $58.10 per share.

Retained earnings

Schedule of changes to retained earnings

Schedule of changes in retained earnings

The following table shows the changes to our retained earnings for the three months ended March 31, 2017:

(in millions)	Retained Earnings
Balance at December 31, 2016	$	4,613.9
Net income attributed to common shareholders	356.6
Common stock dividends	(164.1		)
Cumulative effect of adoption of ASU 2016-09	15.7
Other	(0.1		)
Balance at March 31, 2017	$	4,822.0