Commitments and Contingencies and Off Balance Sheet Arrangements - Guarantees (Details) - USD ($) $ in Millions	Jun. 16, 2018	Feb. 24, 2018
Commitments and Contingencies Disclosure [Abstract]
Outstanding balance on letters of credit	$ 208.8	$ 205.6

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant