Derivatives Schedule of Derivatives (Tables)

3 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

Set forth below is information related to the interest rate swap agreements:

(Millions, except for percentages)	March 31, 2015			December 31, 2014
Designated portion, measured at fair value:
Other assets	$	—		$	0.4
Other current liabilities	$	28.5		$	28.5
Other non-current liabilities	$	54.7		$	48.7
Accumulated other comprehensive (loss) income	$	(3.7	)	$	4.9
De-designated portion, unamortized value:
Accumulated other comprehensive loss	$	(5.5	)	$	(8.8	)
Weighted average fixed rate paid	3.57		%	3.57		%
Variable rate received	0.17		%	0.16		%

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

Changes in the value of these derivative instruments were as follows for the three month periods ended March 31:

(Millions)	2015			2014
Changes in fair value of effective portion, net of tax (a)	$	(5.2	)	$	(4.3	)
Amortization of unrealized losses on de-designated interest rate swaps, net of tax (a)	$	2.0		$	2.6

(a) Included as a component of other comprehensive loss and will be reclassified into earnings as the hedged transaction affects earnings.

Offsetting Assets

Information pertaining to derivative assets was as follows:

					Gross Amounts Not Offset in the Consolidated Balance Sheets
(Millions)	Gross Amount of Recognized Assets		Net Amount of Assets presented in the Consolidated Balance Sheets		Financial Instruments			Cash Collateral Received		Net Amount
December 31, 2014:
Interest rate swaps	$	0.4	$	0.4	$	(0.3	)	$	—	$	0.1

Offsetting Liabilities

Information pertaining to derivative liabilities was as follows:

					Gross Amounts Not Offset in the Consolidated Balance Sheets
(Millions)	Gross Amount of Recognized Liabilities		Net Amount of Liabilities presented in the Consolidated Balance Sheets		Financial Instruments			Cash Collateral Received		Net Amount
March 31, 2015:
Interest rate swaps	$	83.2	$	83.2	$	—		$	—	$	83.2
December 31, 2014:
Interest rate swaps	$	77.2	$	77.2	$	(0.3	)	$	—	$	76.9