Derivative and Other Fair Value Instruments - Summary of Consolidated Derivative Instruments (Details) - Fair Value Hedges [Member]	6 Months Ended
Jun. 30, 2019 USD ($)
Derivative [Line Items]
Current Notional Balance	$ 450,000,000
Maturity Date	2019
Minimum [Member]
Derivative [Line Items]
Interest Rate	2.375%
Maximum [Member]
Derivative [Line Items]
Interest Rate	2.375%

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant