Three months ended 

Nine months ended

September 30,

September 30,

2017

2016

2017

2016

(amounts in millions)

Cost of subscriber services:

Programming and content

$

 7

 6

21

14

Customer service and billing

 1

 1

 3

 3

Other

 2

 1

 4

 3

Other operating expense

 4

 3

11

 9

Selling, general and administrative

71

30

143

80

$

85

41

182

109

Series A

Series C

Weighted

Aggregate

Weighted

Aggregate

average

intrinsic

average

intrinsic

Liberty

remaining

value

Liberty

remaining

value

Awards (000's)

WAEP

life

(millions)

Awards (000's)

WAEP

life

(millions)

Outstanding at January 1, 2017

2,018

$

19.39

11,008

$

25.91

Granted

 —

$

 —

1,068

$

37.12

Exercised

(380)

$

17.77

(753)

$

17.80

Forfeited/Cancelled

 —

$

 —

(51)

$

32.61

Outstanding at September 30, 2017

1,638

$

19.76

2.2

years

$

36

11,272

$

27.48

4.3

years

$

162

Exercisable at September 30, 2017

1,626

$

19.70

2.2

years

$

36

4,968

$

23.63

3.3

years

$

91

Series A

Series C

Weighted

Aggregate

Weighted

Aggregate

average

intrinsic

average

intrinsic

Liberty

remaining

value

Liberty

remaining

value

Awards (000's)

WAEP

life

(millions)

Awards (000's)

WAEP

life

(millions)

Outstanding at January 1, 2017

189

$

11.30

1,073

$

14.92

Granted

 —

$

 —

168

$

23.45

Exercised

(10)

$

8.83

(21)

$

9.05

Forfeited/Cancelled

 —

$

 —

(5)

$

18.88

Outstanding at September 30, 2017

179

$

11.43

2.2

years

$

 2

1,215

$

16.18

4.3

years

$

11

Exercisable at September 30, 2017

178

$

11.41

2.2

years

$

 2

545

$

13.73

3.3

years

$

 6

Series A

Series C

Weighted

Aggregate

Weighted

Aggregate

average

intrinsic

average

intrinsic

Liberty

remaining

value

Liberty

remaining

value

Awards (000's)

WAEP

life

(millions)

Awards (000's)

WAEP

life

(millions)

Outstanding at January 1, 2017

455

$

11.55

2,611

$

15.18

Granted

 —

$

 —

2,263

$

33.98

Exercised

(55)

$

10.55

(173)

$

11.08

Forfeited/Cancelled

 —

$

 —

(12)

$

19.07

Outstanding at September 30, 2017

400

$

11.69

2.2

years

$

10

4,689

$

24.39

5.2

years

$

64

Exercisable at September 30, 2017

397

$

11.66

2.2

years

$

10

1,694

$

20.50

4.4

years

$

30