The accumulated change in the value of either the projected benefit obligation or the plans assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost pursuant to FAS 87 and 106, after tax and the cost of benefit improvement resulting from a plan amendment that occurred during the period, after tax. The cost has not been recognized in net periodic benefit cost pursuant to FAS 87 and 106. A plan amendment includes provisions that grant increased benefits based on services rendered in prior periods.

No definition available.

Unaudited Condensed Consolidated Statements of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Parent [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Translation Adjustment [Member]	Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Accumulated Defined Benefit Plans Adjustment [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2010	$ 448.2	$ 447.4	$ 6.8	$ 1.6	$ 22.6	$ 475.4	$ 28.1	$ (9.0)	$ (78.1)	$ 0.8
Capital in Excess of Par Value
Stock-based compensation	1.8	1.8			1.8
Shares issued under stock compensation plans	0.4	0.4			0.4
Retained Earnings
Net Income	107.7	107.7				107.7
Cash dividends	(13.3)					(13.3)
Accumulated Other Comprehensive Income (Loss)
Foreign currency translation adjustment							(7.7)
Deferred gain (loss) on cash flow hedging								(2.3)
Current period pension and postretirement plan activity									(2.9)
Current period other comprehensive income (loss)	(12.9)	(12.9)
Deferred gain (loss) reclassification adjustment to net income								7.8
Pension and postretirement plan adjustment									8.2
Reclassification adjustment to net income	16.0	16.0
Noncontrolling Interest
Net loss attributable to noncontrolling interest	0.1									0.1
Balance at Sep. 30, 2011	547.8	547.1	6.8	1.6	24.8	569.8	20.4	(3.5)	(72.8)	0.7
Balance at Dec. 31, 2011	577.0	576.2	6.8	1.6	22.7	619.7	13.2	2.6	(90.4)	0.8
Capital in Excess of Par Value
Stock-based compensation	2.2	2.2			2.2
Shares issued under stock compensation plans	0.6	0.6			0.6
Treasury Stock, Value, Acquired, Par Value Method	(0.6)	(0.6)			(0.6)
Retained Earnings
Net Income	85.0	85.0				85.0
Cash dividends	(13.7)	(13.7)				(13.7)
Stock Dividends, Shares	(370.5)	(369.7)				(369.7)				(0.8)
Accumulated Other Comprehensive Income (Loss)
Foreign currency translation adjustment							0.5
Deferred gain (loss) on cash flow hedging								7.5
Current period other comprehensive income (loss)	8.0	8.0
Deferred gain (loss) reclassification adjustment to net income								(2.8)
Pension and postretirement plan adjustment									5.9
Reclassification adjustment to net income	3.1	3.1
Balance at Sep. 30, 2012	$ 291.1	$ 291.1	$ 6.8	$ 1.6	$ 24.9	$ 321.3	$ 13.7	$ 7.3	$ (84.5)	$ 0