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Leases (Tables) | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Schedule of Rent Expense | Rent expense consisted of the following:
(in millions) | 2017 |  | 2016 |  | 2015
Basic expense | $ | 40.2 |  |  | $ | 36.1 |  |  | $ | 30.4 |
Contingent expense | 3.2 |  |  | 2.0 |  |  | 2.8 |
Sublease income | (0.1 | ) |  | (0.2 | ) |  | (0.3 | )
Rent expense, net | $ | 43.3 |  |  | $ | 37.9 |  |  | $ | 32.9 |
Schedule of Minimum Rental Payments for Operating Leases | Future minimum rental payments at December 31, 2017, under agreements classified as operating leases with non-cancelable terms in excess of one year, were as follows:
(in millions) |
2018 | $ | 37.6 |
2019 | 31.7 |
2020 | 23.7 |
2021 | 15.7 |
2022 | 11.5 |
Thereafter | 32.2 |
Total (not reduced by minimum sublease income of $0.2) | $ | 152.4 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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