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v3.19.3.a.u2

Contract assets and contract liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |  |
Contract assets - current | $ 53.0 | $ 29.7
Contract assets - long-term | 21.6 | 22.2
Deferred revenue - current | (288.6) | (294.4)
Deferred revenue - long-term | (147.4) | (157.2)
Deposit liabilities principally included in current deferred revenue | 25.3 | 21.2
Revenue recognized that was included in deferred revenue at the beginning of the period | $ 287.9 | $ 307.1

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