Deferred Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Changes in Deferred Revenue

The changes in our deferred revenue during the six months ended June 30, 2022 are as follows (in millions):

	Annual Listings Revenues		Original Listings Revenues		Other Listings Revenues		Data Services and Other Revenues		Mortgage Technology		Total
Deferred revenue balance at December 31, 2021	$	—	$	19	$	93	$	93	$	79	$	284
Additions	435		31		34		283		46		829
Amortization	(219)		(19)		(23)		(222)		(55)		(538)
Deferred revenue balance at June 30, 2022	$	216	$	31	$	104	$	154	$	70	$	575

The changes in our deferred revenue during the six months ended June 30, 2021 are as follows (in millions):

	Annual Listings Revenues		Original Listings Revenues		Other Listings Revenues		Data Services and Other Revenues		Mortgage Technology		Total
Deferred revenue balance at December 31, 2020	$	—	$	13	$	92	$	95	$	59	$	259
Additions	384		19		34		265		37		739
Amortization	(197)		(14)		(22)		(206)		(21)		(460)
Deferred revenue balance at June 30, 2021	$	187	$	18	$	104	$	154	$	75	$	538