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Revenue (Tables)
9 Months Ended
Sep. 30, 2019
Revenue [Abstract]  
Disaggregation of Revenue ___

Three Months Ended

Nine Months Ended

September 30,

September 30,

(In millions)

2019

2018

2019

2018

Renewals

$

278

$

251

$

722

$

648

Real estate

77

78

206

205

Direct-to-consumer

50

47

131

122

Other

2

1

6

4

Total

$

407

$

377

$

1,065

$

979

Movement In Deferred Revenue

(In millions)

Deferred
revenue

Balance as of December 31, 2018

$

185

Deferral of revenue

309

Recognition of deferred revenue

(314)

Balance as of September 30, 2019

$

180