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. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013	Dec. 31, 2013	Jun. 27, 2014 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2013 Fair Value, Measurements, Recurring [Member]	Jun. 27, 2014 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 10, 2013 Stock Repurchase Program [Member]	Jun. 28, 2013 Stock Repurchase Program [Member]	Jun. 27, 2014 Stock Repurchase Program [Member]	Jun. 28, 2013 Stock Repurchase Program [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
Purchase of common shares, value											19.0	30.7	19.0
Purchase of common shares, share											579,038	1,000,000	579,038
Average cost per share											$ 32.76	$ 30.73	$ 32.76
Dividends per share declared and paid	$ 0.18	$ 0.18	$ 0.36	$ 0.18
Payments of dividends in total	8.8	8.9	17.8
Market value of mutual fund investments, nonvested and subsequently vested stock and restricted stock in the rabbi trust	41.3		41.3		42.0
Market value of the assets held by the rabbi trust classified as other non-current assets						23.8	22.2	23.8	22.2
Amounts payable to the plan participants classified as other liabilities	$ 25.8		$ 25.8		$ 24.2