Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

COMMITMENTS AND CONTINGENCIES - Legal Proceedings (Details) $ in Millions	1 Months Ended		6 Months Ended
	Feb. 28, 2009 item	Dec. 31, 2008 item	Jul. 01, 2018 USD ($) item
Letter of credit
Contingencies
Outstanding letters of credit \| $			$ 29.7
"Sacramento Case"
Contingencies
Number of carriers	5,000
Number of phases			3
"Fresno Case"
Contingencies
Number of carriers		3,500
Number of phases			2