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Leases | 12 Months Ended
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Dec. 31, 2018
Leases [Abstract] |
Leases | Leases We lease property and equipment primarily under operating leases. Renewal options exist for substantially all leases. Future undiscounted minimum payments, by year and in the aggregate, under noncancelable operating leases with any remaining terms consisted of the following as of December 31, 2018:
Year |
2019 |  | $151.4 |
2020 | 115.2 |
2021 | 85.5 |
2022 | 65.0 |
2023 | 44.1 |
Thereafter | 105.6 |
Total minimum lease payments |  | $566.8 |
Rental expense for all operating leases was $175.8, $173.1 and $166.5 for the years ended December 31, 2018, 2017 and 2016, respectively.

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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