Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Weighted-Average and Target Asset Allocations

The Company’s weighted-average asset allocations at December 31, 2013 and 2012, and 2013 year-end target allocation, by asset category, were as follows:

	Target		2013		2012
Domestic equity securities	28	%	29	%	50	%
International equity securities	15	%	16	%	14	%
Debt securities	46	%	44	%	18	%
Real estate	7	%	5	%	5	%
Other and cash	4	%	6	%	13	%
Total	100	%	100	%	100	%

Fair Value of Pension Plan Assets

The fair values of the Company’s pension plan assets at December 31, 2013 and 2012, by asset category, are as follows (in millions):

	Fair Value Measurements as of
	December 31, 2013
	Total		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash	$	5.2	$	5.2
Equity securities:
U.S. large-cap	24.4		24.4
U.S. mid- and small-cap	20.4		20.4
International large-cap	16.3		16.3
International mid-cap	8.1		8.1
Fixed income securities:
Exchange traded funds - U.S. Treasuries	16.3		16.3
Exchange traded funds - Investment grade U.S. corporate bonds	45.0		45.0
Limited partnership investment in high-yield U.S. corporate bonds	6.4						6.4
Other types of investments:
Real estate partnership interests	7.5						7.5
Private equity partnership interests (a)	0.3						0.3
Exchange traded fund - commodities	2.5		2.5
Insurance contracts	1.0						1.0
Total	$	153.4	$	138.2	$	—	$	15.2

	Fair Value Measurements as of
	December 31, 2012
	Total		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Asset Category
Cash	$	12.7	$	12.7
Equity securities:
U.S. large-cap	47.6		47.6
U.S. mid- and small-cap	23.6		23.6
International large-cap	16.0		5.8		10.2
Emerging market equity	4.1				4.1
Fixed income securities:
U.S. Treasuries	0.8				0.8
Municipal bonds	1.9				1.9
Investment grade U.S. corporate bonds	6.1				6.1
High-yield U.S. corporate bonds	4.1				4.1
Mortgage-backed securities and other	12.5				12.5
Other types of investments:
Real estate partnership interests	7.8						7.8
Private equity partnership interests (a)	0.7						0.7
Managed Futures fund	3.5				3.5
Insurance contracts	0.9						0.9
Total	$	142.3	$	89.7	$	43.2	$	9.4

(a) This category represents private equity funds that invest principally in U.S. technology companies.

Reconciliations of Pension Plan Investments Measured at Fair Value on Recurring Basis

The table below presents a reconciliation of all pension plan investments measured at fair value on a recurring basis using significant unobservable inputs (level 3) for the years ended December 31, 2013 and 2012 (in millions):

	Fair Value Measurements Using Significant
	Unobservable Inputs (Level 3)
	Real Estate			Private Equity			Insurance		Limited Partnership		Total
Beginning balance, January 1, 2012	$	7.4		$	0.8		$	0.7	$	—	$	8.9
Actual return on plan assets:
Assets held at the reporting date	0.7			—			—		—		0.7
Assets sold during the period	0.3			0.3			—		—		0.6
Purchases, sales and settlements	(0.6		)	(0.4		)	0.2		—		(0.8		)
Ending balance, December 31, 2012	7.8			0.7			0.9		—		9.4
Actual return on plan assets:
Assets held at the reporting date	1.1			(0.2		)	0.1		0.3		1.3
Assets sold during the period	0.3			0.1			—		—		0.4
Purchases, sales and settlements	(1.7		)	(0.3		)	—		6.1		4.1
Ending balance, December 31, 2013	$	7.5		$	0.3		$	1.0	$	6.4	$	15.2

Benefit Obligation, Plan Assets, and Funded Status

The status of the funded defined benefit pension plan and the unfunded accumulated post-retirement benefit plans at December 31, 2013 and 2012 are shown below (in millions):

	Pension Benefits						Other Post-retirement Benefits
	2013			2012			2013			2012
Change in Benefit Obligation
Benefit obligation at beginning of year	$	189.7		$	173.6		$	10.9		$	11.4
Service cost	2.6			2.4			0.1			0.1
Interest cost	7.6			8.2			0.4			0.5
Plan participants’ contributions	—			—			0.9			1.0
Actuarial (gain) loss	(13.2		)	15.4			3.0			(0.3		)
Benefits paid	(11.1		)	(10.0		)	(1.8		)	(1.8		)
Special or contractual termination benefits	—			0.1			—			—
Curtailment	(0.2		)	—			(0.6		)
Amendments	—			—			—			—
Benefit obligation at end of year	$	175.4		$	189.7		$	12.9		$	10.9
Change in Plan Assets
Fair value of plan assets at beginning of year	142.3			130.8			—			—
Actual return on plan assets	22.1			18.9			—			—
Employer contributions	0.1			2.6			—			—
Benefits paid	(11.1		)	(10.0		)	—			—
Fair value of plan assets at end of year	$	153.4		$	142.3		$	—		$	—
Funded Status and Recognized Liability	$	(22.0	)	$	(47.4	)	$	(12.9	)	$	(10.9	)

Amounts Recognized on the Consolidated Balance Sheets and in Accumulated Other Comprehensive Loss

Amounts recognized on the consolidated balance sheets and in accumulated other comprehensive loss at December 31, 2013 and 2012 were as follows (in millions):

	Pension Benefits						Other Post-retirement Benefits
	2013			2012			2013			2012
Non-current assets	$	3.3		$	1.4		$	—		$	—
Current liabilities	—			—			(0.9		)	(0.8		)
Non-current liabilities	(25.3		)	(48.8		)	(12.0		)	(10.1		)
Total	$	(22.0	)	$	(47.4	)	$	(12.9	)	$	(10.9	)
Net loss (gain) (net of taxes)	$	33.2		$	53.0		$	1.1		$	(1.4	)
Unrecognized prior service credit (net of taxes)	(3.9		)	(4.4		)	—			—
Total	$	29.3		$	48.6		$	1.1		$	(1.4	)

Accumulated Benefit Obligation in Excess of Plan Assets

The information for qualified pension plans with an accumulated benefit obligation in excess of plan assets at December 31, 2013 and 2012 is shown below (in millions):

	2013		2012
Projected benefit obligation	$	167.7	$	181.0
Accumulated benefit obligation	$	166.0	$	178.4
Fair value of plan assets	$	142.4	$	132.2

Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Loss

Components of the net periodic benefit cost and other amounts recognized in other comprehensive loss for the defined benefit pension plans and the post-retirement health care and life insurance benefit plans during 2013, 2012, and 2011, are shown below (in millions):

	Pension Benefits									Other Post-retirement Benefits
	2013			2012			2011			2013			2012			2011
Components of Net Periodic Benefit Cost
Service cost	$	2.6		$	2.4		$	3.4		$	0.1		$	0.1		$	0.2
Interest cost	7.6			8.2			9.3			0.4			0.5			0.7
Expected return on plan assets	(10.9		)	(10.5		)	(11.7		)	—			—			—
Amortization of net loss (gain)	7.7			7.9			4.8			(0.2		)	(0.2		)	—
Amortization of prior service cost (credit)	(0.8		)	(0.8		)	0.6			—			—			—
Curtailment gain	—			—			—			(0.5		)	—			—
Recognition of loss on special termination benefit	—			0.1			—						—			—
Net periodic benefit cost	6.2			7.3			6.4			(0.2		)	0.4			0.9
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	(24.7		)	7.0			21.0			3.0			(0.4		)	(0.8		)
Amortization of unrecognized (loss) gain	(7.7		)	(7.9		)	(3.0		)	0.2			0.3			—
Prior service credit	—			—			(6.7		)	—			—			—
Amortization of prior service cost (credit)	0.8			0.8			(0.3		)	—			—			—
Total recognized in other comprehensive income	(31.6		)	(0.1		)	11.0			3.2			(0.1		)	(0.8		)
Total recognized in net periodic benefit cost and
other comprehensive income	$	(25.4	)	$	7.2		$	17.4		$	3.0		$	0.3		$	0.1

Weighted Average Assumptions Used to Determine Benefit Information

The weighted average assumptions used to determine benefit information during 2013, 2012, and 2011 were as follows:

	Pension Benefits						Other Post-retirement Benefits
	2013		2012		2011		2013		2012		2011
Weighted Average Assumptions:
Discount rate	4.90	%	4.10	%	4.80	%	4.90	%	4.10	%	4.90	%
Expected return on plan assets	8.00	%	8.25	%	8.25	%	—	%	—	%	—	%
Rate of compensation increase	3.00	%	3.00	%	4.00	%	3.00	%	3.00	%	4.00	%
Initial health care cost trend rate							7.50	%	8.00	%	9.00	%
Ultimate rate							4.50	%	4.50	%	5.00	%
Year ultimate rate is reached							2028		2020		2016

Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

If the assumed health care cost trend rate were increased or decreased by one percentage point, the accumulated post-retirement benefit obligation, as of December 31, 2013, 2012, and 2011 and the net periodic post-retirement benefit cost for 2013, 2012 and 2011, would have increased or decreased as follows (in millions):

	Other Post-retirement Benefits
	One Percentage Point
	Increase						Decrease
	2013		2012		2011		2013			2012			2011
Effect on total of service and interest cost components	$	—	$	—	$	—	$	—		$	—		$	—
Effect on post-retirement benefit obligation	$	1.2	$	0.6	$	0.5	$	(1.0	)	$	(0.5	)	$	(0.5	)

Estimated Future Benefit Payments for the Next Ten Years

The estimated future benefit payments for the next ten years are as follows (in millions):

	Pension		Non-qualified		Post-retirement
Year	Benefits		Plan Benefits		Benefits
2014	$	10.4	$	0.1	$	0.8
2015	$	10.6	$	0.7	$	0.8
2016	$	10.9	$	3.5	$	0.8
2017	$	11.0	$	0.1	$	0.8
2018	$	11.2	$	1.0	$	0.7
2019-2023	$	60.1	$	0.5	$	2.5

Schedule of Multiemployer Plans

		Pension Protection Act Zone Status	FIP/RP Status	Contribution by Entity		Surcharge Imposed	Expiration Date	Current Plan Year End
	EIN Plan No.	2013	Pending/Implemented	Oct. 1 - Dec. 31, 2013
Fund
Operating Engineers	94-6090764; 001	Red	Yes	$	1.0	No	8/31/14	12/31/13
Laborers National	52-6074345; 001	Red	Yes	—		No	8/31/15	12/31/13
Hawaii Laborers	99-6012128; 001	Green	No	0.1		No	8/1/15	2/28/13
Hawaii Laborers	99-6012128; 001	Green	No	—		No	9/30/14	2/28/13
				$	1.1