Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Schedule Of Face And Fair Value Of Debt

The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness for the periods ending: 

	September 30, 2015				December 31, 2014
	Face Value		Fair Value		Face Value		Fair Value
	(In Millions)
Fixed-rate	$	2,220.3	$	2,386.3	$	1,955.3	$	2,231.2
Variable-rate	50.0		50.0		50.0		50.0
Total indebtedness	$	2,270.3	$	2,436.3	$	2,005.3	$	2,281.2