Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value By Balance Sheet Grouping

The estimated fair value of financial instruments at September 30, 2015 was as follows:

			Fair Value Measurements at Reporting Date Using
(In millions)	Total Carrying Amount		Total Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets(Level 1)		Significant Observable Inputs (Level 2)
Cash and cash equivalents	$	197.5	$	197.5	$	197.5	$	—
Derivative financial instruments:
Assets	30.4		30.4		—		30.4
Liabilities	64.4		64.4		—		64.4
Debt	1,505.6		1,404.4		1,398.8		5.6

The estimated fair value of financial instruments at December 31, 2014 was as follows:

			Fair Value Measurements at Reporting Date Using
(In millions)	Total Carrying Amount		Total Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)
Cash and cash equivalents	$	269.5	$	269.5	$	269.5	$	—
Derivative financial instruments:
Assets	59.9		59.9		—		59.9
Liabilities	27.0		27.0		—		27.0
Debt	1,526.9		1,616.0		1,589.1		26.9