Fair Value Fair Value (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

The table below presents the carrying value of our debt portfolio along with the fair value of a fixed-rate debt portfolio with similar terms and maturities, which is based on borrowing rates available to us in the applicable year. This valuation used Level 2 inputs.

	March 31, 2019				December 31, 2018
(in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Fixed-rate debt portfolio	$	404.6	$	402.3	$	405.0	$	398.4