Consolidated Statements of Changes in Equity (Unaudited) (USD $) In Millions	Total USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)	Treasury Stock [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	Capital Units [Member]
Beginning Balance at Dec. 31, 2009	$ 1,092.5	$ 1.6	$ 1,360.3	$ 1,564.4	$ (7.6)	$ (1,826.3)	$ 0.1
Beginning Balance, Shares at Dec. 31, 2009								85.4
Comprehensive income:
Net income	65.2			64.9			0.3
Reclassification adjustment for hedge gains and losses included in net income	0.2				0.2
Foreign currency translation adjustments	(0.2)				(0.2)
Change in fair value of cash flow hedges	0.1				0.1
Total comprehensive income	65.3
Issuance of restricted stock to employees, net of forfeitures (in shares)								1.7
Amortization expense in connection with employee stock options and restricted stock	13.7		13.7
Tax effects from vesting of restricted stock	(1.5)		(1.5)
Tax effects of expired employee stock options	(0.4)		(0.4)
Dividends on common stock ($0.10 per share)	(8.8)			(8.8)
Exercise of employee stock options	0.6		0.6
Distributions to noncontrolling interest	(0.3)						(0.3)
Ending Balance at Jul. 03, 2010	1,161.1	1.6	1,372.7	1,620.5	(7.5)	(1,826.3)	0.1
Ending Balance, Shares at Jul. 03, 2010								87.1
Beginning Balance at Dec. 31, 2010	1,138.3	0.9	541.9	603.8	(8.4)	0	0.1
Beginning Balance, Shares at Dec. 31, 2010								86.4
Comprehensive income:
Net income	31.2			30.8			0.4
Reclassification adjustment for hedge gains and losses included in net income	0.3				0.3
Foreign currency translation adjustments	(1.4)				(1.4)
Change in fair value of cash flow hedges	(0.4)				(0.4)
Total comprehensive income	29.7
Issuance of restricted stock to employees, net of forfeitures (in shares)								1.7
Amortization expense in connection with employee stock options and restricted stock	11.1		11.1
Tax effects from vesting of restricted stock	0.9		0.9
Tax effects of expired employee stock options	(1.2)		(1.2)
Treasury stock acquired	(28.0)		(13.3)	(14.7)
Treasury stock acquired (in shares)								(2.2)
Dividends on common stock ($0.10 per share)	(8.7)			(8.7)
Other	0.1			0.1
Distributions to noncontrolling interest	(0.3)						(0.3)
Ending Balance at Jul. 02, 2011	$ 1,141.9	$ 0.9	$ 539.4	$ 611.3	$ (9.9)	$ 0	$ 0.2
Ending Balance, Shares at Jul. 02, 2011								85.9