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Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefits

Summary of benefit payments under various defined benefit plans, which reflect expected future employee service, as appropriate, expected to be paid in the future periods

		SERP's			Defined Benefit Plans			Postretirement Medical Plans
		(in millions)
2012		$	1.3		$	3.0		$	1.0
2013			1.4			3.0			0.8
2014			2.1			3.2			0.9
2015			2.1			3.5			0.9
2016			2.0			3.5			0.9
2017 - 2021			13.1			20.5			6.3

Amounts in accumulated other comprehensive income that are expected to be recognized as components of net periodic benefit cost during 2012

		SERP's			Defined Benefit Plans			Postretirement Medical Plans
		(in millions)
Actuarial loss		$	1.0		$	1.4		$	0.5
Prior service (credit) cost			(0.4	)		0.2			(1.7	)
Total		$	0.6		$	1.6		$	(1.2	)

Schedule of Company's expense for Company-sponsored retirement plans

		Year Ended December 31,
		2011			2010			2009
		(in millions)
Master Plan		$	16.9		$	14.8		$	13.3
Other Defined Contribution Plans			3.9			2.4			1.4
Employee Stock Ownership Plan			1.4			1.2			1.2
Deferred Compensation Plan			0.5			1.0			1.4
Supplemental Executive Retirement Plans			2.0			3.1			3.1
Defined Benefit Plans			0.7			1.0			2.0
Postretirement Medical Plans			1.8			2.1			1.7
		$	27.2		$	25.6		$	24.1

SERP's and Defined Benefit Plans

Employee Benefits

Summary of the status of the funding of the plans, change in plan assets and items not yet recognized as a component of net periodic pension expense

		SERP's						Defined Benefit Plans
		2011			2010			2011			2010
		(in millions)						(in millions)
Change in benefit obligation
Benefit obligation at beginning of year		$	29.4		$	30.5		$	64.4		$	52.1
Assumed in acquisition			—			—			—			9.1
Service cost			0.7			0.8			1.0			0.7
Interest cost			1.5			1.8			3.4			3.2
Actuarial loss (gain)			5.8			(2.8	)		9.8			2.4
Change in assumptions			—			—			1.6			(0.3	)
Benefits paid			(1.2	)		(0.9	)		(2.9	)		(2.9	)
Plan amendments			—			—			0.8			0.1
Benefit obligation at end of year		$	36.2		$	29.4		$	78.1		$	64.4
Change in plan assets
Fair value of plan assets			N/A			N/A		$	53.7		$	41.6
Acquired in acquisition			N/A			N/A			—			5.7
Actual return on plan assets			N/A			N/A			(1.7	)		5.9
Employer contributions			N/A			N/A			4.1			3.5
Benefits paid			N/A			N/A			(3.0	)		(3.0	)
Fair value of plan assets at end of year			N/A			N/A		$	53.1		$	53.7
Funded status
Unfunded status of the plans		$	(36.2	)	$	(29.4	)	$	(25.0	)	$	(10.7	)
Items not yet recognized as component of net periodic pension expense
Unrecognized net actuarial losses		$	10.7		$	5.2		$	24.7		$	9.9
Unamortized prior service (credit) cost			(1.6	)		(2.1	)		1.2			0.4
		$	9.1		$	3.1		$	25.9		$	10.3

Schedule of amounts recognized in the statement of financial position

		SERP's						Defined Benefit Plans
		2011			2010			2011			2010
		(in millions)						(in millions)
Amounts recognized in the statement of financial position
Current liabilities		$	(1.3	)	$	(1.3	)	$	—		$	—
Noncurrent liabilities			(34.9	)		(28.1	)		(25.0	)		(10.7	)
Accumulated other comprehensive loss			9.1			3.1			25.9			10.3
Net amount recognized		$	(27.1	)	$	(26.3	)	$	0.9		$	(0.4	)

Schedule of details of net periodic benefit cost

		SERP's									Defined Benefit Plans
		Year Ended December 31,									Year Ended December 31,
		2011			2010			2009			2011			2010			2009
		(in millions)									(in millions)
Service cost		$	0.7		$	0.8		$	0.8		$	1.0		$	0.7		$	0.8
Interest cost			1.5			1.8			1.7			3.4			3.2			2.9
Expected return on plan assets			—			—			—			(4.3	)		(3.5	)		(2.7	)
Curtailment/settlement expense			—			—			—			0.1			0.1			0.1
Prior service (credit) cost			(0.4	)		(0.4	)		(0.4	)		0.1			0.1			0.1
Amortization of net loss			0.2			0.9			1.0			0.4			0.4			0.8
		$	2.0		$	3.1		$	3.1		$	0.7		$	1.0		$	2.0

Schedule of assumptions used to determine net periodic benefit cost

		SERP's									Defined Benefit Plans
		Year Ended December 31,									Year Ended December 31,
		2011			2010			2009			2011			2010			2009
Weighted average assumptions to determine net cost
Discount rate			5.40	%		5.99	%		6.01	%		5.29	%		5.92	%		6.06	%
Expected long-term rate of return on plan assets			N/A			N/A			N/A			7.95	%		8.10	%		8.04	%
Rate of compensation increase			6.00	%		6.00	%		6.00	%		N/A			N/A			N/A

Schedule of assumptions used to determine the benefit obligation

		SERP's						Defined Benefit Plans
		2011			2010			2011			2010
Weighted average assumptions to determine benefit obligations
Discount rate			4.18	%		5.39	%		4.31	%		5.43	%
Expected long-term rate of return on plan assets			N/A			N/A			7.95	%		8.10	%
Rate of compensation increase			6.00	%		6.00	%		N/A			N/A

Postretirement Medical Plans

Employee Benefits

Summary of the status of the funding of the plans, change in plan assets and items not yet recognized as a component of net periodic pension expense

		Year Ended December 31,
		2011			2010
		(in millions)
Change in benefit obligation
Benefit obligation at beginning of year		$	17.5		$	14.4
Service cost			0.9			0.9
Interest cost			0.9			1.0
Plan amendments			(10.1	)		—
Benefit payments			(0.4	)		(0.3	)
Assumed in acquisition			1.8			—
Actuarial loss			1.3			1.5
Benefit obligation at end of year		$	11.9		$	17.5
Unfunded status		$	(11.9	)	$	(17.5	)
Amounts recognized in the statement of financial position
Current liabilities		$	(1.0	)	$	(0.8	)
Noncurrent liabilities			(10.9	)		(16.7	)
Accumulated other comprehensive (income) loss			(4.6	)		4.3
Net amount recognized		$	(16.5	)	$	(13.2	)
Item not yet recognized as component of net periodic pension expense
Unrecognized net actuarial losses		$	5.1		$	4.3
Unrecognized prior service credit			(9.7	)		—
Accumulated other comprehensive (income) loss		$	(4.6	)	$	4.3

Schedule of details of net periodic benefit cost

		Year Ended December 31,
		2011			2010			2009
		(in millions)
Service cost		$	0.9		$	0.9		$	0.8
Interest cost			0.9			1.0			0.8
Amortization of net loss			0.4			0.2			0.1
Amortization of prior service credit			(0.4	)		—			—
		$	1.8		$	2.1		$	1.7

Schedule of assumptions used to determine net periodic benefit cost

		Year Ended December 31,
		2011			2010			2009
Weighted average assumptions to determine net cost
Discount rate			5.17	%		6.00	%		6.00	%
Health care cost trend rate			10.00	%		10.00	%		10.00	%
Rate to which the cost trend rate is assumed to decline			4.50	%		6.00	%		6.00	%
Year that the rate reaches the ultimate trend rate			2030			2014			2013

Schedule of assumptions used to determine the benefit obligation

		December 31,
		2011			2010
Weighted average assumptions to determine benefit obligations
Discount rate			3.50	%		5.25	%
Health care cost trend rate			9.50	%		10.00	%
Rate to which the cost trend rate is assumed to decline			4.50	%		4.50	%
Year that the rate reaches the ultimate trend rate			2031			2030

Schedule of effects of one-percentage-point change in assumed health care cost trend rates

		Year Ended December 31, 2011						Year Ended December 31, 2010
		1% Increase			1% Decrease			1% Increase			1% Decrease
		(in millions)						(in millions)
Effect on total service and interest cost components		$	0.2		$	(0.2	)	$	0.3		$	(0.2	)
Effect on postretirement benefit obligation			1.0			(0.9	)		2.1			(1.8	)

Defined Benefit Plans

Employee Benefits

Schedule of information for defined benefit plans with an accumulated benefit obligation and projected benefit obligation in excess of plan assets

		Year Ended December 31,
		2011			2010
		(in millions)
Information for defined benefit plans with an accumulated benefit obligation and projected benefit obligation in excess of plan assets
Accumulated benefit obligation		$	78.1		$	62.2
Projected benefit obligation			78.1			62.2
Fair value of plan assets			53.1			51.3

Schedule of weighted-average asset allocations of the Company's Defined Benefit Plans by asset category

		December 31,
		2011			2010
Plan Assets
Equity securities			63	%		68	%
Debt securities			34	%		29	%
Other			3	%		3	%
Total			100	%		100	%

Schedule of fair value measurements of Defined Benefit Plan assets

		Level 1			Level 2			Level 3			Total
		(in millions)
December 31, 2011:
Common stock(1)		$	22.2		$	—		$	—		$	22.2
U.S. government and agency			—			6.5			—			6.5
State government			—			—			—			—
Corporate debt securities(2)			—			6.1			—			6.1
Mutual funds(3)			7.9			8.9			—			16.8
Interest and non-interest bearing cash			1.5			—			—			1.5
		$	31.6		$	21.5		$	—		$	53.1
December 31, 2010:
Common stock(1)		$	23.6		$	—		$	—		$	23.6
U.S. government and agency			—			6.1			—			6.1
State government			—			0.3			—			0.3
Corporate debt securities(2)			—			6.6			—			6.6
Mutual funds(3)			8.4			7.1			—			15.5
Interest and non-interest bearing cash			1.6			—			—			1.6
		$	33.6		$	20.1		$	—		$	53.7

⁽¹⁾

Comprised of primarily large domestic and international securities. Valued at the closing price reported on the active market on which the individual securities are traded.

⁽²⁾

Valued using a combination of inputs including: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data.

⁽³⁾

Level 1 assets are comprised of exchange traded funds, money market funds, and stock and bond funds. These assets are valued at closing price for exchange traded funds and Net Asset Value (NAV) for open-end and closed-end mutual funds. Level 2 assets are comprised of pooled separate accounts and are valued at the net asset value per unit based on either the observable net asset value of the underlying investment or the net asset value of the underlying pool of securities.

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Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans, the benefit obligation including assumed discount rates, rate increase in compensation increase and expected long-term rates of return on plan assets.

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Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans, net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.

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Tabular disclosure of the weighted-average asset allocations shown by asset category.

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Tabular disclosure of net funded status of pension plans and/or other employee benefit plans. May include a reconciliation of beginning and ending balances of the change in the benefit obligation of pension plans and/or other employee benefit plans, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. May include a reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. Also may include disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income or loss that have not yet been recognized as components of net periodic benefit cost, such as the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets.

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Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.

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Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.

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Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost.

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Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits.

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Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.

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Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

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