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Postretirement and Other Benefits (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Plan Disclosure [Line Items]

The funded status of these plans as of December 31, 2015 and 2014 was as follows ($ in millions):



	Pension Benefits												OPEB Benefits
	United States						France						United States
	2015			2014			2015			2014			2015			2014
Change in Projected Benefit Obligation, or PBO:
PBO at beginning of year	$	132.4		$	121.6		$	37.3		$	37.7		$	1.8		$	2.8
Service cost	—			—			1.3			1.3			—			—
Interest cost	5.0			5.6			0.4			0.8			0.1			0.1
Actuarial (gain) loss	(6.5		)	14.6			(0.6		)	4.4			0.4			(0.1		)
Participant contributions	—			—			—			—			0.1			0.2
Plan amendment	—			(2.1		)	(0.7		)	—			—			(0.6		)
Gross benefits paid	(7.5		)	(7.3		)	(2.5		)	(1.7		)	(0.7		)	(0.6		)
Currency translation effect	—			—			(3.0		)	(5.2		)	—			—
PBO at end of year	$	123.4		$	132.4		$	32.2		$	37.3		$	1.7		$	1.8
Change in Plan Assets:
Fair value of plan assets at beginning of year	128.9			126.0			10.2			12.3			—			—
Actual return on plan assets	(4.7		)	12.3			0.5			0.5			—			—
Employer contributions	—			—			1.3			1.0			0.6			0.4
Participant contributions	—			—			—			—			0.1			0.2
Plan amendment	—			(2.1		)	—			—			—			—
Gross benefits paid	(7.5		)	(7.3		)	(2.6		)	(2.2		)	(0.7		)	(0.6		)
Currency translation effect	—			—			(1.0		)	(1.4		)	—			—
Fair value of plan assets at end of year	$	116.7		$	128.9		$	8.4		$	10.2		$	—		$	—
Funded status at end of year	$	(6.7	)	$	(3.5	)	$	(23.8	)	$	(27.1	)	$	(1.7	)	$	(1.8	)

Schedule of Accumulated Benefit Obligations and PBO excess of Fair Value of Pension Plan Assets

The PBO and ABO exceeded the fair value of pension plan assets for the Company's French defined benefit pension plans as of December 31, 2015 and 2014 and U.S. defined benefit plan as of December 31, 2015 as follows ($ in millions):



	United States				France
	2015		2014		2015		2014
PBO	$	123.4	$	132.4	$	32.2	$	37.3
ABO	123.4		132.4		28.3		32.2
Fair value of plan assets	116.7		128.9		8.4		10.2

Schedule of Defined Benefit Plan Amounts Recognized in Accumulated Other Comprehensive Income

As of December 31, 2015, the pre-tax amounts in accumulated other comprehensive income that have not been recognized as components of net periodic benefit cost for the U.S. and French pension plans and other postretirement benefit plans in the United States are as follows ($ in millions):



	Pension Benefits					OPEB Benefits
	United States		France			United States
Accumulated loss	$	42.1	$	16.9		$	0.9
Prior service credit	—		(4.5		)	(0.4		)
Accumulated other comprehensive loss (income)	$	42.1	$	12.4		$	0.5

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year

The amounts in accumulated other comprehensive loss at December 31, 2015, which are expected to be recognized as components of U.S. and French net periodic benefit cost in 2016 are as follows ($ in millions):



	Pension Benefits						OPEB Benefits
	United States			France			United States
Amortization of accumulated loss	$	(3.9	)	$	(1.3	)	$	(0.3	)
Amortization of prior service credit	—			0.3			0.1
Total	$	(3.9	)	$	(1.0	)	$	(0.2	)

Schedule of Net Benefit Costs

The components of net pension and OPEB benefit costs for U.S. employees and net pension benefit costs for French employees during the years ended December 31, 2015, 2014 and 2013 were as follows ($ in millions):



	U.S. Pension Benefits									French Pension Benefits									U.S. OPEB Benefits
	2015			2014			2013			2015			2014			2013			2015			2014			2013
Service cost	$	—		$	—		$	—		$	1.3		$	1.3		$	1.3		$	—		$	—		$	0.1
Interest cost	5.0			5.6			5.1			0.4			0.8			0.8			0.1			0.1			0.1
Expected return on plan assets	(7.0		)	(7.4		)	(7.1		)	(0.3		)	(0.4		)	(0.4		)	—			—			—
Amortizations and other	5.1			4.2			6.7			0.2			0.7			0.5			(0.2		)	(0.5		)	(0.7		)
Curtailment benefit	—			—			—			—			—			—			—			(2.7		)	(3.2		)
Net periodic benefit cost	$	3.1		$	2.4		$	4.7		$	1.6		$	2.4		$	2.2		$	(0.1	)	$	(3.1	)	$	(3.7	)

Schedule of Allocation of Plan Assets

The following table sets forth by level, within the fair value hierarchy, the U.S. and French pension plans' assets at fair value as of December 31, 2015 ($ in millions):



	United States								France
Plan Asset Category	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2
Cash equivalents	$	1.2	$	1.2	$	—	$	—	$	1.0	$	1.0	$	—
Equity securities
Domestic Large Cap	8.0		—		8.0		—		1.7		1.7		—
Domestic Small Cap	5.3		—		5.3		—		—		—		—
International	21.6		—		21.6		—		—		—		—
Fixed income securities	80.3		—		80.3		—		5.5		—		5.5
Alternative investments*	0.3		—		—		0.3		0.2		—		0.2
Total	$	116.7	$	1.2	$	115.2	$	0.3	$	8.4	$	2.7	$	5.7

The following table sets forth by level, within the fair value hierarchy, the U.S. and French pension plans' assets at fair value as of December 31, 2014 ($ in millions):



	United States								France
Plan Asset Category	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2
Cash equivalents	$	1.1	$	1.1	$	—	$	—	$	1.1	$	1.1	$	—
Equity securities
Domestic Large Cap	7.2		—		7.2		—		1.7		1.7		—
Domestic Small Cap	5.5		—		5.5		—		—		—		—
International	21.3		—		21.3		—		—		—		—
Fixed income securities	87.0		—		87.0		—		7.3		—		7.3
Alternative investments*	6.8		—		—		6.8		0.1		—		0.1
Total	$	128.9	$	1.1	$	121.0	$	6.8	$	10.2	$	2.8	$	7.4

* Alternative investments include ownership interests in shares of registered investment companies.

The U.S. and French pension plans' asset target allocations by asset category for 2015 and actual allocations by asset category at December 31, 2015 and 2014 were as follows:



	United States						France
	2016 Target		2015		2014		2015		2014
Asset Category
Cash and cash equivalents	1	%	1	%	1	%	12	%	11	%
Equity securities*
Domestic Large Cap	8		7		5		20		17
Domestic Small Cap	3		4		4
International	18		19		17
Fixed income securities	68		69		68		66		71
Alternative investments**	2		—		5		2		1
Total	100	%	100	%	100	%	100	%	100	%


*	None of the Company's pension plan assets are targeted for investment in SWM stock, except that it is possible that one or more mutual funds held by the plan could hold shares of SWM.


**	Investments in this category under the U.S. pension plan only may include hedge funds, and may include real estate under the French pension plan.

Schedule of Changes in Plan Assets

The following table shows the changes in Level 3 asset values ($ in millions):



U.S. Level 3 Asset Reconciliation	Alternative Investments Total
Beginning balance, January 1, 2013	$	6.4
Realized and unrealized gains	0.5
Purchases	—
Sales	(0.1		)
Ending balance, December 31, 2014	$	6.8
Realized and unrealized gains	0.1
Purchases	0.5
Sales	(7.1		)
Ending balance, December 31, 2015	$	0.3

Schedule of Expected Benefit Payments

The Company expects the following estimated undiscounted future pension benefit payments for the United States and France and future postretirement healthcare and life insurance benefit payments for the United States, which are to be made from pension plan and employer assets, net of amounts that will be funded from retiree contributions, and which reflect expected future service, as appropriate ($ in millions):



	United States				France
	Pension Benefits		Healthcare and Life Insurance Benefits		Pension Benefits
2016	$	8.2	$	0.3	$	2.9
2017	8.2		0.2		3.5
2018	8.4		0.1		0.7
2019	8.4		0.1		2.1
2020	8.4		0.1		1.5
2021 - 2025	41.0		0.4		6.6

Benefit Obligations [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Assumptions Used

The weighted average assumptions used to determine benefit obligations as of December 31, 2015 and 2014 were as follows:



	Pension Benefits								OPEB Benefits
	United States				France				United States
	2015		2014		2015		2014		2015		2014
Discount rate	4.40	%	3.94	%	1.43	%	1.17	%	4.29	%	3.82	%
Rate of compensation increase	—	%	—	%	1.90	%	1.90	%	3.50	%	3.50	%

Net Periodic Benfit Cost [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Assumptions Used

The weighted average assumptions used to determine net periodic benefit costs for the years ended December 31, 2015, 2014 and 2013 were as follows:



	Pension Benefits												OPEB Benefits
	United States						France						United States
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	3.94	%	4.78	%	4.00	%	1.43	%	1.17	%	2.38	%	3.82	%	4.02	%	3.25	%
Expected long-term rate of return on plan assets	6.06	%	6.48	%	6.50	%	3.00	%	3.00	%	3.25	%	—	%	—	%	—	%
Rate of compensation increase	—		—		—		1.90	%	1.90	%	2.50	%	3.50	%	3.50	%	3.50	%