Debt And Bank Credit Facilities (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jul. 02, 2011	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Jan. 01, 2011 Term Loan [Member]	Jun. 16, 2008 Term Loan [Member]	Dec. 31, 2011 Floating Rate Series 2007A Senior Notes, Tranche A, [Member]	Dec. 31, 2011 Floating Rate Series 2007A Senior Notes, Tranche B, [Member]	Dec. 31, 2011 Standby Letters Of Credit [Member]	Dec. 31, 2011 Long-term Debt [Member]	Dec. 31, 2011 Short-term Debt [Member]
Debt Instrument [Line Items]
Senior notes		$ 750,000,000	$ 250,000,000				$ 500,000,000	$ 250,000,000
Principal amount of debt						165,000,000
Repayment of term loan		20,000,000
Interest rate based on margin over London Inter-Bank Offered Rate					1.30%
Revolving credit facility	500,000,000	500,000,000							49,500,000
Revolving credit facility, maturity date	April 2012
Revolving credit facility, amount outstanding		9,000,000
Interest rate based on margin over LIBOR		1.60%
Average balance outstanding under the Facility		10,700,000	1,400,000
Facility average interest rate		1.60%	1.20%
Available borrowing capacity under the Facility			441,500,000
Face value of bonds converted			39,200,000
Shares issued for the conversion premium			0.9
Other notes payable amount outstanding		15,200,000	14,900,000
Outstanding short-term borrowings of foreign subsidiary				7,000,000
Fixed interest rate of outstanding short-term borrowings of foreign subsidiary				5.60%
Weighted average interest rate of other notes payable		2.20%	4.70%
Acquisitions, debt assumed		$ 11,100,000								$ 2,300,000	$ 600,000