v3.10.0.1
Share-based Compensation (Tables)
6 Months Ended
Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of stock-based compensation A summary of our aggregate share-based compensation expense is set forth below: 
 
Three months ended June 30,
 
Six months ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
in millions
Liberty Global:
 
 
 
 
 
 
 
Performance-based incentive awards (a)
$
8.0

 
$
19.1

 
$
16.7

 
$
19.8

Non-performance based share-based incentive awards
24.3

 
24.6

 
46.3

 
46.3

Other (b)
13.4

 

 
20.5

 

Total Liberty Global
45.7

 
43.7

 
83.5

 
66.1

Other
(0.2
)
 
7.7

 
4.7

 
14.2

Total
$
45.5

 
$
51.4

 
$
88.2

 
$
80.3

Included in:
 
 
 
 
 
 
 
Other operating expense
$

 
$
0.9

 
$
1.0

 
$
1.9

SG&A expense
45.5

 
50.5

 
87.2

 
78.4

Total
$
45.5

 
$
51.4

 
$
88.2

 
$
80.3

_______________

(a)
Includes share-based compensation expense related to (i) performance-based restricted share units (PSUs) and (ii) through March 31, 2017, performance grant units (PGUs) held by our Chief Executive Officer.

(b)
Represents annual incentive compensation and defined contribution plan liabilities that have been or are expected to be settled with Liberty Global ordinary shares. In the case of the annual incentive compensation, shares will be issued to senior management and key employees pursuant to a shareholding incentive program that was implemented in 2018. The shareholding incentive program allows these employees to elect to receive up to 100% of their annual incentive compensation in ordinary shares of Liberty Global in lieu of cash.

Schedule of stock option activity The following table provides the aggregate number of options and share appreciation rights (SARs) with respect to awards issued by Liberty Global that were (i) outstanding and (ii) exercisable as of June 30, 2018.
 
Class A
 
Class C
 
Number of shares underlying awards
 
Weighted Average exercise or base price
 
Number of shares underlying awards
 
Weighted Average exercise or base price
Held by Liberty Global employees:
 
 
 
 
 
 
 
Outstanding
16,106,261

 
$
32.28

 
37,449,896

 
$
30.38

Exercisable
9,311,226

 
$
31.85

 
22,890,732

 
$
29.65

 
 
 
 
 
 
 
 
Held by former Liberty Global employees:
 
 
 
 
 
 
 
Outstanding
1,202,625

 
$
32.72

 
2,825,949

 
$
30.54

Exercisable
952,952

 
$
31.91

 
2,325,227

 
$
29.64

Schedule of other share based compensation activity The following table provides the aggregate number of restricted share units (RSUs) and PSUs that were outstanding as of June 30, 2018:
 
Class A
 
Class C
Held by Liberty Global employees:
 
 
 
RSUs
640,075

 
1,265,060

PSUs
1,771,830

 
3,548,966

Held by former Liberty Global employees:
 
 
 
RSUs
13,719

 
27,501

PSUs
172,971

 
346,299