Financial Instruments and Risk Management (Tables)

12 Months Ended

Dec. 31, 2017

General Discussion of Derivative Instruments and Hedging Activities [Abstract]

Impact of Cash Flow Hedges on Accumulated Other Comprehensive Income

For the year ended December 31, 2016, treasury lock agreements impacted AOCI as follows:

	2016
Pre-tax net unamortized deferred losses at beginning of year(1)	$	(4.0	)
Reclassification of net losses to earnings	4.0
Pre-tax net unamortized deferred losses at end of year	$	—

(1)Amounts above exclude taxes of $2.7 at the beginning of year in 2016