Condensed consolidated guarantor financial information Condensed consolidating statements of cash flows (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash (used in) provided by operating activities from continuing operations	$ 208,798	$ 135,872
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant and equipment	(48,220)	(54,640)
Proceeds from sale of assets and investments	5,251	0
Payments for businesses and intangibles acquired, net of cash acquired	(28,535)	(40,450)
Investments in affiliates	(40)	(50)
Intercompany dividends received	0
Net cash used in investing activities from continuing operations	(71,544)	(95,140)
Cash Flows from Financing Activities of Continuing Operations:
Proceeds from long-term borrowings	250,000	382,000
Repayment of long-term borrowings	(480,009)	(375,000)
Debt issuance fees	(3,689)	(6,365)
Proceeds from share based compensation plans and the related tax impacts	2,936	4,740
Payments to Noncontrolling Interests	(1,094)	(736)
Payments for contingent consideration	0	(16,367)
Dividends	(42,174)	(41,915)
Intercompany transactions	0	0
Intercompany dividends paid	0	0
Net cash used in financing activities from continuing operations	(274,030)	(53,643)
Cash Flows from Discontinued Operations:
Net cash used in operating activities	(1,946)	(2,167)
Net cash used in discontinued operations	(1,946)	(2,167)
Effect of exchange rate changes on cash and cash equivalents	(6,880)	4,476
Net increase (decrease) in cash and cash equivalents	(145,602)	(10,602)
Cash and cash equivalents at the beginning of the period	431,984	337,039
Cash and cash equivalents at the end of the period	286,382	326,437
Consolidation, Eliminations
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash (used in) provided by operating activities from continuing operations	(75,340)	(66,071)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant and equipment	0	0
Proceeds from sale of assets and investments	0
Payments for businesses and intangibles acquired, net of cash acquired	0	0
Investments in affiliates	0	0
Intercompany dividends received	(229,782)
Net cash used in investing activities from continuing operations	(229,782)	0
Cash Flows from Financing Activities of Continuing Operations:
Proceeds from long-term borrowings	0	0
Repayment of long-term borrowings	0	0
Debt issuance fees	0	0
Proceeds from share based compensation plans and the related tax impacts	0	0
Payments to Noncontrolling Interests	0	0
Payments for contingent consideration		0
Dividends	0	0
Intercompany transactions	0	0
Intercompany dividends paid	305,122	66,071
Net cash used in financing activities from continuing operations	305,122	66,071
Cash Flows from Discontinued Operations:
Net cash used in operating activities	0	0
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at the beginning of the period	0	0
Cash and cash equivalents at the end of the period	0	0
Parent Company
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash (used in) provided by operating activities from continuing operations	(80,537)	(85,753)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant and equipment	(2,146)	(799)
Proceeds from sale of assets and investments	1,669
Payments for businesses and intangibles acquired, net of cash acquired	0	0
Investments in affiliates	(60)	(50)
Intercompany dividends received	0
Net cash used in investing activities from continuing operations	(537)	(849)
Cash Flows from Financing Activities of Continuing Operations:
Proceeds from long-term borrowings	250,000	382,000
Repayment of long-term borrowings	(480,009)	(375,000)
Debt issuance fees	(3,689)	(6,365)
Proceeds from share based compensation plans and the related tax impacts	2,936	4,740
Payments to Noncontrolling Interests	0	0
Payments for contingent consideration		0
Dividends	(42,174)	(41,915)
Intercompany transactions	372,762	70,932
Intercompany dividends paid	0	0
Net cash used in financing activities from continuing operations	99,826	34,392
Cash Flows from Discontinued Operations:
Net cash used in operating activities	(1,946)	(1,567)
Net cash used in discontinued operations	(1,946)	(1,567)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	16,806	(53,777)
Cash and cash equivalents at the beginning of the period	42,749	70,860
Cash and cash equivalents at the end of the period	59,555	17,083
Guarantor Subsidiaries
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash (used in) provided by operating activities from continuing operations	300,960	147,461
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant and equipment	(22,578)	(42,854)
Proceeds from sale of assets and investments	3,421
Payments for businesses and intangibles acquired, net of cash acquired	0	(1,820)
Investments in affiliates	20	0
Intercompany dividends received	0
Net cash used in investing activities from continuing operations	(19,137)	(44,674)
Cash Flows from Financing Activities of Continuing Operations:
Proceeds from long-term borrowings	0	0
Repayment of long-term borrowings	0	0
Debt issuance fees	0	0
Proceeds from share based compensation plans and the related tax impacts	0	0
Payments to Noncontrolling Interests	0	0
Payments for contingent consideration		(14,802)
Dividends	0	0
Intercompany transactions	(294,661)	(72,574)
Intercompany dividends paid	0	(17,400)
Net cash used in financing activities from continuing operations	(294,661)	(104,776)
Cash Flows from Discontinued Operations:
Net cash used in operating activities	0	0
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	(12,838)	(1,989)
Cash and cash equivalents at the beginning of the period	14,500	1,989
Cash and cash equivalents at the end of the period	1,662	0
Non-Guarantor Subsidiaries
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash (used in) provided by operating activities from continuing operations	63,715	140,235
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant and equipment	(23,496)	(10,987)
Proceeds from sale of assets and investments	161
Payments for businesses and intangibles acquired, net of cash acquired	(28,535)	(38,630)
Investments in affiliates	0	0
Intercompany dividends received	229,782
Net cash used in investing activities from continuing operations	177,912	(49,617)
Cash Flows from Financing Activities of Continuing Operations:
Proceeds from long-term borrowings	0	0
Repayment of long-term borrowings	0	0
Debt issuance fees	0	0
Proceeds from share based compensation plans and the related tax impacts	0	0
Payments to Noncontrolling Interests	(1,094)	(736)
Payments for contingent consideration		(1,565)
Dividends	0	0
Intercompany transactions	(78,101)	1,642
Intercompany dividends paid	(305,122)	(48,671)
Net cash used in financing activities from continuing operations	(384,317)	(49,330)
Cash Flows from Discontinued Operations:
Net cash used in operating activities	0	(600)
Net cash used in discontinued operations	0	(600)
Effect of exchange rate changes on cash and cash equivalents	(6,880)	4,476
Net increase (decrease) in cash and cash equivalents	(149,570)	45,164
Cash and cash equivalents at the beginning of the period	374,735	264,190
Cash and cash equivalents at the end of the period	$ 225,165	$ 309,354