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Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Minimum Future Lease Payments

Minimum future lease payments (e.g., base rent for leases of office space) due in each of the next five years and thereafter, as of December 31, 2017, are presented in the below table.

($ in millions)
2018	$	173.1
2019	158.0
2020	134.6
2021	116.6
2022	87.6
Thereafter	301.0
Total	$	970.9

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- References

No definition available.

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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

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