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SUBSEQUENT EVENT	9 Months Ended
	Sep. 27, 2020
Subsequent Event [Line Items]
Subsequent Event	SUBSEQUENT EVENTOn October 1, 2020, we took possession of office space we are under contract to lease. The location requires construction and retrofitting before it will be available to serve as our Chicago Headquarters. The lease has a term of 15 years, commencing on April 1, 2021. As a result, we recorded a $29.5 million right-of-use asset and corresponding lease liability as of the date of possession.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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