v3.5.0.2
Deferred Revenue Deferred Revenue (Tables)
 9 Months Ended
Sep. 30, 2016
Revenue Recognition [Abstract]  
Deferred Revenue Rollforward [Table Text Block]
The changes in our deferred revenue during the nine months ended September 30, 2016 are as follows (in millions):
 
Annual Listings Revenue
 
Original Listings Revenues
 
Other Listings Revenues
 
Data Services and Other Revenues
 
Total
Deferred revenue balance at December 31, 2015
$
—

 
$
50

 
$
59

 
$
81

 
$
190

Additions
363

 
15

 
57

 
353

 
788

Amortization
(274
)
 
(7
)
 
(33
)
 
(330
)
 
(644
)
Deferred revenue balance at September 30, 2016
$
89

 
$
58

 
$
83

 
$
104

 
$
334