Debt and Other Financing Arrangements - Notes Payable (Details)	Dec. 31, 2018	Dec. 31, 2017
Notes Payable Current
Short-term Debt [Line Items]
Weighted average interest rate on outstanding borrowings at end of year	4.40%	2.90%

Weighted average interest rate of short-term debt outstanding calculated at point in time.

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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant