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Contract Balances (Tables) | 12 Months Ended
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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.”

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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