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Financing Activities	9 Months Ended
Financing Activities	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Financing Activities On August 21, 2018 the Company entered into a new syndicated revolving credit facility with a five year term and an overall capacity of $850.0 million, replacing its existing $850.0 million syndicated revolving credit facility, which was scheduled to mature in September 2019.