Deferred Revenue And Remaining Performance Obligations (Tables)

9 Months Ended

Sep. 30, 2022

Revenue Recognition and Deferred Revenue [Abstract]

Schedule of Deferred Revenue and Performance Obligations

Changes in our deferred revenue during the third quarter and first three quarters of 2022 and 2021 were as follows: 

	Third Quarter of				First Three Quarters of
(In millions)	2022		2021		2022		2021
Beginning balance of the period	$	685.2	$	606.1	$	631.8	$	613.8
Revenue recognized from prior year-end	(92.0)		(92.3)		(453.8)		(471.8)
Billings net of revenue recognized from current year	43.6		75.2		458.8		447.0
Ending balance of the period	$	636.8	$	589.0	$	636.8	$	589.0