Contract Balances (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Contract Balances

Contract balances at December 31 are set forth in the following table:

Balance Sheet Account	2021		2020		Change
Unbilled receivables	$	95.3	$	72.8	$	22.5
Contract liabilities - current (1)	(1,130.2)		(990.3)		(139.9)
Deferred revenue - non-current	(75.3)		(42.7)		(32.6)
Net contract assets/(liabilities)	$	(1,110.2)	$	(960.2)	$	(150.0)

(1) Consists primarily of “Deferred revenue.”