Total Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			6 Months Ended				0 Months Ended	3 Months Ended	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012		Jun. 28, 2013	Jun. 29, 2012		Dec. 31, 2012	May 15, 2013 Stock Repurchase Program [Member]	Jun. 28, 2013 Stock Repurchase Program [Member]	Jun. 28, 2013 Stock Repurchase Program [Member]	Jun. 28, 2013 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member]	Jun. 28, 2013 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]
Class of Stock [Line Items]
Common stock authorized, shares	200,000,000			200,000,000
Preferred stock authorized, shares	25,000,000			25,000,000
Authorized amount								$ 125
Period in force								1 year
Purchase of common shares, value									19.0	19.0
Purchase of common shares, share									579,038	579,038
Average cost per share									$ 32.76	$ 32.76
Dividends per share declared and paid	$ 0.18	$ 0	[1]	$ 0.18	$ 0	[1]
Payments of dividends in total	8.9
Market value of mutual fund investments, nonvested and subsequently vested stock and restricted stock in the rabbi trust	40.2			40.2			38.1
Market value of the assets held by the rabbi trust classified as other non-current assets											19.7	17.7	19.7	17.7
Amounts payable to the plan participants classified as other liabilities	$ 21.7			$ 21.7			$ 19.8

[1] See Note 23 - Restatement of Condensed Consolidated Financial Statements