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Share-Based Compensation (Tables)
3 Months Ended
Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation Activity
The following table summarizes the Company’s share-based compensation activity during the three months ended June 30, 2018:
 
Options
 
Restricted Shares
 
Service-Based RSUs
 
Performance-Based RSUs
Outstanding/Unvested at March 31, 2018
3,796,620

 
64,148

 
2,127,517

 
657,532

Granted
224,582

 

 
757,231

 
166,617

Exercised/Vested
(619,465
)
 
(52,786
)
 
(493,541
)
 
(105,900
)
Decrease due to performance condition

 

 

 
(101,744
)
Canceled/forfeited
(4,600
)
 
(344
)
 
(45,437
)
 
(3,397
)
Outstanding/Unvested at June 30, 2018
3,397,137

 
11,018

 
2,345,770

 
613,108


Assumptions Used to Estimate Fair Value of Options
The following table presents assumptions used to estimate the fair value of options granted during the three months ended June 30, 2018 and July 1, 2017:
 
Three Months Ended
 
June 30,
2018
 
July 1,
2017
Expected dividend yield
0.0
%
 
0.0
%
Volatility factor
36.9
%
 
36.3
%
Weighted average risk-free interest rate
2.8
%
 
1.8
%
Expected life of option
4.85 years

 
4.69 years

Summary of Compensation Expense Attributable to Share-Based Compensation
The following table summarizes compensation expense attributable to share-based compensation for the three months ended June 30, 2018 and July 1, 2017 (in millions):
 
Three Months Ended
 
June 30,
2018
 
July 1,
2017
Share-based compensation expense
$
12.8

 
$
10.8

Tax benefit related to share-based compensation expense
$
2.2

 
$
3.6