Deferred Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Changes in Deferred Revenue

The changes in our deferred revenue during the three months ended March 31, 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	419		26		27		186		26		684
Amortization	(108)		(9)		(12)		(112)		(32)		(273)
Deferred revenue balance at March 31, 2022	$	311	$	36	$	108	$	167	$	73	$	695

The changes in our deferred revenue during the three months ended March 31, 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	377		9		24		175		19		604
Amortization	(96)		(6)		(12)		(105)		(10)		(229)
Deferred revenue balance at March 31, 2021	$	281	$	16	$	104	$	165	$	68	$	634