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Lease Commitments | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Lease Commitments | Lease Commitments The Company is obligated under various non-cancelable operating lease agreements for office facilities that generally provide for minimum rent payments and a proportionate share of operating expenses and property taxes and include certain renewal and expansion options. For the years ended December 31, 2017, 2016 and 2015, rent expense under these lease arrangements was $29 million, $27 million and $25 million, respectively. Capital leases included in property and equipment are not significant. Future minimum lease payments under non-cancelable operating leases as of December 31, 2017 are as follows:
(in millions) |  |
Years ending December 31, |  | Future Minimum Lease Payments
2018 |  | $ | 22.1 |
2019 |  | 21.8 |
2020 |  | 21.0 |
2021 |  | 14.5 |
2022 |  | 9.0 |
Thereafter |  | 43.4 |
Total future minimum lease payments |  | $ | 131.8 |

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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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