Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Ordinary Shares Issued	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Balance at Jun. 28, 2014	$ 8,720.4	$ 6,678.2	$ 139.6	$ 1,902.6
Balance, shares at Jun. 27, 2015		146,300,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	136.1			136.1
Other comprehensive loss	(36.1)		(36.1)
Issuance of ordinary shares under:
Equity offering, shares		6,800,000
Equity offering	1,035.0	$ 1,035.0
Omega acquisition, shares		5,400,000
Omega acquisition	904.9	$ 904.9
Stock options, shares		200,000
Stock options	8.5	$ 8.5
Restricted stock plan, shares		200,000
Compensation for stock options	6.9	$ 6.9
Compensation for restricted stock	24.7	24.7
Cash dividends	(64.8)			(64.8)
Tax effect from stock transactions	7.0	$ 7.0		0.0
Shares withheld for payment of employee's withholding tax liability, shares		(100,000)
Shares withheld for payment of employee's withholding tax liability	(7.6)	$ (7.6)
Equity issuance costs	(35.7)	$ (35.7)
Balance, shares at Jun. 28, 2014		133,800,000
Balance at Jun. 27, 2015	10,699.3	$ 8,621.9	103.5	1,973.9
Balance, shares at Dec. 31, 2015		143,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	42.5			42.5
Other comprehensive loss	(118.8)		(118.8)
Issuance of ordinary shares under:
Stock options, shares		100,000
Stock options	4.9	$ 4.9
Restricted stock plan, shares		100,000
Compensation for stock options	2.5	$ 2.5
Compensation for restricted stock	20.3	20.3
Cash dividends	(36.3)			(36.3)
Tax effect from stock transactions	3.3	$ 3.3
Shares withheld for payment of employee's withholding tax liability, shares		(100,000)
Shares withheld for payment of employee's withholding tax liability	(10.3)	$ (10.3)
Repurchases of ordinary shares, shares		(3,300,000)
Repurchases of ordinary shares	(500.0)	$ (500.0)
Balance, shares at Jun. 27, 2015		146,300,000
Balance at Dec. 31, 2015	10,107.4	$ 8,142.6	(15.3)	1,980.1
Balance, shares at Dec. 31, 2016		143,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(4,012.8)			(4,012.8)
Other comprehensive loss	$ (66.5)		(66.5)
Issuance of ordinary shares under:
Stock options, shares	122,000	200,000
Stock options	$ 8.3	$ 8.3
Restricted stock plan, shares		200,000
Compensation for stock options	5.0	$ 5.0
Compensation for restricted stock	18.0	18.0
Cash dividends	(83.2)	(20.8)		(62.4)
Tax effect from stock transactions	(1.5)	$ (1.5)
Shares withheld for payment of employee's withholding tax liability, shares		(100,000)
Shares withheld for payment of employee's withholding tax liability	$ (6.3)	$ (6.3)		0.0
Repurchases of ordinary shares, shares	0
Equity issuance costs	$ (10.3)	$ (10.3)
Balance, shares at Dec. 31, 2015		143,100,000
Balance at Dec. 31, 2016	5,958.1	$ 8,135.0	(81.8)	(2,095.1)
Balance, shares at Dec. 31, 2017		140,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	119.6			119.6
Other comprehensive loss	$ 334.9		334.9
Issuance of ordinary shares under:
Stock options, shares	31,000	100,000
Stock options	$ 0.7	$ 0.7
Restricted stock plan, shares		100,000
Compensation for stock options	8.9	$ 8.9
Compensation for restricted stock	34.9	34.9
Cash dividends	(91.1)	$ (91.1)		0.0
Shares withheld for payment of employee's withholding tax liability, shares		(100,000)
Shares withheld for payment of employee's withholding tax liability	(4.0)	$ (4.0)
Repurchases of ordinary shares, shares		(2,700,000)
Repurchases of ordinary shares	(191.5)	$ (191.5)
Balance, shares at Dec. 31, 2016		143,400,000
Balance at Dec. 31, 2017	$ 6,170.5	$ 7,892.9	$ 253.1	$ (1,975.5)