Debt - Standby Letter of Credit (Details) - Receivables Securitization Facility	1 Months Ended
Jun. 30, 2016 USD ($)	Feb. 29, 2012 USD ($) installment	Sep. 30, 2016 USD ($)
Line of Credit Facility [Line Items]
Issuance of standby letter of credit		$ 80,000,000	$ 0
Number of payment installments \| installment		4
First installment payment	$ 18,900,000

Amount of the required periodic payments of both interest and principal.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration