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Revenue recognition - ESP and Voucher Promotions (Details) - USD ($) $ in Millions | Aug. 03, 2019 | Feb. 02, 2019 | Aug. 04, 2018
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Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | $ 965.2 | $ 966.5 | $ 939.6
Deferred revenue | 265.4 | 270.0 | 276.3
Non-current liabilities | 699.8 | 696.5 | 663.3
ESP deferred revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | 930.2 | 927.6 | 906.6
Voucher promotions and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | $ 35.0 | $ 38.9 | $ 33.0

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