EMPLOYEE STOCK BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock-Based Compensation Expense by Award Type

The following table summarizes stock-based compensation expense related to stock options, performance share awards and restricted stock units.

	Three Months Ended March 31,
(Dollars in millions)	2017			2016
Stock options	$	2.5		$	2.1
Performance share awards	1.4			2.3
Restricted stock units	5.5			3.4
Total pre-tax stock-based compensation expense	$	9.4		$	7.8
Net tax benefit related to stock-based compensation expense	$	(3.1	)	$	(2.7	)

Awards Granted and Weighted-Average Grant Date Fair Value of Options Granted

During the three months ended March 31, 2017, the Company granted the following awards: 

(Shares in millions)	Options/Shares Granted	Weighted- Average Grant Date Fair Value
Performance share awards	0.1	$	84.87
Restricted stock units	0.5	$	87.79

Unrecognized Compensation Costs of Outstanding Share Awards

As of March 31, 2017, the Company had the following award expense yet to be recognized: 

(Dollars in millions)	Unrecognized Compensation Expense		Expected Weighted-Average Period to be Recognized (years)
Stock options	$	6.7	2.0
Performance share awards	10.0		1.2
Restricted stock units	71.9		2.6
Total	$	88.6