Condensed Consolidating Financial Information (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
OPERATING ACTIVITIES
Net income	$ 9.1	$ 6.7	$ 30.7	$ 21.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			21.8	23.5
Stock-based compensation			3.9	3.1
Excess tax benefits from stock-based compensation (Note 7)			(5.1)	(0.8)
Deferred income tax provision (benefit)			8.9	5.9
Inventory acquired in Wausau acquisition			(6.6)
SERP payment, net of settlement charge			(3.4)
Loss on retirement of bonds			0.2	2.4
Loss on asset dispositions			0.2
Increase in working capital			(26.8)	(10.2)
Pension and other postretirement benefits			(1.3)	(4.8)
Other			(0.6)	(1.0)
NET CASH PROVIDED BY OPERATING ACTIVITIES			21.9	39.5
INVESTING ACTIVITIES
Capital expenditures			(15.8)	(18.9)
Decrease in restricted cash			7.0
Purchase of marketable securities			(0.1)	(5.3)
Purchase of Wausau brands			(14.1)
Other			0.2	0.4
NET CASH USED IN INVESTING ACTIVITIES			(22.8)	(23.8)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt			45.2	27.8
Debt issuance costs				(0.4)
Repayments of long-term debt			(28.3)	(89.3)
Short-term borrowings			1.2	8.5
Repayments of short-term debt			(21.1)	(3.7)
Shares purchased			(6.3)	(0.5)
Proceeds from exercise of stock options			4.9	1.5
Excess tax benefits from stock-based compensation (Note 7)			5.1	0.8
Cash dividends paid			(5.8)	(5.0)
Other			(0.2)
NET CASH USED IN FINANCING ACTIVITIES			(5.3)	(60.3)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS				0.1
NET DECREASE IN CASH AND CASH EQUIVALENTS			(6.2)	(44.5)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR			12.8	48.3
CASH AND CASH EQUIVALENTS, END OF PERIOD	6.6	3.8	6.6	3.8
Neenah Paper, Inc.
OPERATING ACTIVITIES
Net income	9.1	6.7	30.7	21.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			8.9	9.0
Stock-based compensation			2.0	2.9
Excess tax benefits from stock-based compensation (Note 7)			(5.1)	(0.8)
Deferred income tax provision (benefit)			3.0	4.1
Inventory acquired in Wausau acquisition			(6.6)
SERP payment, net of settlement charge			(3.4)
Loss on retirement of bonds	0.2		0.2	2.4
Loss on asset dispositions			0.2
Increase in working capital			(22.7)	(4.0)
Equity in earnings of subsidiaries	(5.1)	(5.1)	(23.7)	(20.8)
Pension and other postretirement benefits			(2.8)	(0.7)
Other				(0.1)
NET CASH PROVIDED BY OPERATING ACTIVITIES			(19.3)	13.4
INVESTING ACTIVITIES
Capital expenditures			(8.4)	(4.2)
Decrease in restricted cash			7.0
Purchase of marketable securities			(0.1)	(5.3)
Purchase of Wausau brands			(14.1)
Other			(0.2)	0.2
NET CASH USED IN INVESTING ACTIVITIES			(15.8)	(9.3)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt			45.2	27.8
Debt issuance costs				(0.4)
Repayments of long-term debt			(27.5)	(88.4)
Shares purchased			(6.3)	(0.5)
Proceeds from exercise of stock options			4.9	1.5
Excess tax benefits from stock-based compensation (Note 7)			5.1	0.8
Cash dividends paid			(5.8)	(5.0)
Other			0.2
Intercompany transfers - net			10.0	15.2
NET CASH USED IN FINANCING ACTIVITIES			25.4	(49.0)
NET DECREASE IN CASH AND CASH EQUIVALENTS			(9.7)	(44.9)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR			9.7	45.0
CASH AND CASH EQUIVALENTS, END OF PERIOD		0.1		0.1
Guarantor Subsidiaries
OPERATING ACTIVITIES
Net income	2.2	2.5	8.3	8.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			3.1	3.2
Deferred income tax provision (benefit)			7.5	3.5
Increase in working capital			(3.9)	(1.1)
Pension and other postretirement benefits			1.0	(4.5)
Other			(0.6)	(0.8)
NET CASH PROVIDED BY OPERATING ACTIVITIES			15.4	8.6
INVESTING ACTIVITIES
Capital expenditures			(3.8)	(1.8)
Other			0.1	(0.1)
NET CASH USED IN INVESTING ACTIVITIES			(3.7)	(1.9)
FINANCING ACTIVITIES
Intercompany transfers - net			(12.0)	(7.0)
NET CASH USED IN FINANCING ACTIVITIES			(12.0)	(7.0)
NET DECREASE IN CASH AND CASH EQUIVALENTS			(0.3)	(0.3)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR			2.0	2.4
CASH AND CASH EQUIVALENTS, END OF PERIOD	1.7	2.1	1.7	2.1
Non-Guarantor Subsidiaries
OPERATING ACTIVITIES
Net income	2.9	2.6	15.4	12.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			9.8	11.3
Stock-based compensation			1.9	0.2
Deferred income tax provision (benefit)			(1.6)	(1.7)
Increase in working capital			(0.2)	(5.1)
Pension and other postretirement benefits			0.5	0.4
Other				(0.1)
NET CASH PROVIDED BY OPERATING ACTIVITIES			25.8	17.5
INVESTING ACTIVITIES
Capital expenditures			(3.6)	(12.9)
Other			0.3	0.3
NET CASH USED IN INVESTING ACTIVITIES			(3.3)	(12.6)
FINANCING ACTIVITIES
Repayments of long-term debt			(0.8)	(0.9)
Short-term borrowings			1.2	8.5
Repayments of short-term debt			(21.1)	(3.7)
Intercompany transfers - net			2.0	(8.2)
NET CASH USED IN FINANCING ACTIVITIES			(18.7)	(4.3)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS				0.1
NET DECREASE IN CASH AND CASH EQUIVALENTS			3.8	0.7
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR			1.1	0.9
CASH AND CASH EQUIVALENTS, END OF PERIOD	4.9	1.6	4.9	1.6
Consolidating Adjustments
OPERATING ACTIVITIES
Net income	(5.1)	(5.1)	(23.7)	(20.8)
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of subsidiaries	$ 5.1	$ 5.1	$ 23.7	$ 20.8