Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 27, 2014		Jun. 28, 2014		Mar. 29, 2014		Dec. 31, 2013		Sep. 28, 2013		Jun. 29, 2013		Mar. 30, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 116,177	[1]	$ 146,864	[2]	$ 127,884	[3]	$ 107,120	[4]	$ 134,831	[5]	$ 96,779	[6]	$ 89,935	[7]	$ 77,875	[8]	$ 498,045		$ 399,420		$ 506,332
Weight-average shares outstanding - basic																	98,675		102,559		109,240
Net effect of various dilutive stock-based compensation awards																	1,272		1,140		1,837
Weighted average shares outstanding - diluted																	99,947		103,699		111,077
Net Income per Share [Abstract]
Basic	$ 1.20	[1],[9]	$ 1.49	[2],[9]	$ 1.29	[3],[9]	$ 1.07	[4],[9]	$ 1.34	[5]	$ 0.96	[6]	$ 0.87	[7]	$ 0.74	[8]	$ 5.05		$ 3.89		$ 4.64
Diluted	$ 1.18	[1],[9]	$ 1.47	[2],[9]	$ 1.27	[3],[9]	$ 1.06	[4],[9]	$ 1.32	[5]	$ 0.95	[6]	$ 0.86	[7]	$ 0.72	[8]	$ 4.98	[10]	$ 3.85	[10]	$ 4.56	[10]
Stock Compensation Plan [Member]
Net Income per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																	294		874		1,424

[1] restructuring, integration, and other charges ($11,222 net of related taxes or $.12 and $.11 per share on a basic and diluted basis, respectively)

[2] restructuring, integration, and other charges ($2,556 net of related taxes or $.03 per share on both a basic and diluted basis)

[3] restructuring, integration, and other charges ($7,526 net of related taxes or $.08 and $.07 per share on a basic and diluted basis, respectively).

[4] Includes amortization expense related to identifiable intangible assets ($8,907 net of related taxes or $.09 per share on both a basic and diluted basis) and restructuring, integration, and other charges ($8,020 net of related taxes or $.08 per share on both a basic and diluted basis)

[5] restructuring, integration, and other charges ($13,341 net of related taxes or $.13 per share on both a basic and diluted basis). Also included is an increase in the provision for income taxes ($15,447 net of related taxes or $.16 per share on both a basic and diluted basis) and interest expense ($297 net of related taxes) related to the settlement of certain international tax matters.

[6] Includes amortization expense related to identifiable intangible assets ($7,074 net of related taxes or $.07 per share on both a basic and diluted basis) and restructuring, integration, and other charges ($16,077 net of related taxes or $.16 per share on both a basic and diluted basis).

[7] Includes amortization expense related to identifiable intangible assets ($7,029 net of related taxes or $.07 per share on both a basic and diluted basis) and restructuring, integration, and other charges ($20,688 net of related taxes or $.20 per share on both a basic and diluted basis).

[8] restructuring, integration, and other charges ($15,495 net of related taxes or $.15 and $.14 per share on a basic and diluted basis, respectively), and a loss on prepayment of debt ($2,627 net of related taxes or $.02 per share on both a basic and diluted basis).

[9] Quarterly net income per share is calculated using the weighted-average shares outstanding during each quarterly period, while net income per share for the full year is calculated using the weighted-average shares outstanding during the year. Therefore, the sum of the net income per share for each of the four quarters may not equal the net income per share for the full year.

[10] Stock-based compensation awards for the issuance of 294 shares, 874 shares, and 1,424 shares for the years ended December 31, 2014, 2013, and 2012, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.