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Long-Term Debt - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	Sep. 28, 2018	May 31, 2018	Dec. 31, 2017	Jun. 08, 2015
Debt Instrument [Line Items]
Carrying Amount	$ 2,900.1		$ 3,175.0
Capital lease obligations	71.3
Debt discount	(149.5)		(178.8)
Debt issuance costs	(35.7)	$ (1.1)	(44.4)
Net long-term debt, including current maturities	2,714.9		2,951.8
Less: Current maturities	(99.2)		(248.1)
Net long-term debt	2,615.7		2,703.7
Debt discount	149.5		178.8
Debt issuance costs	35.7	$ 1.1	44.4
Revolving Credit Facility due 2021, interest payable monthly at 3.49% and 3.07%, respectively
Debt Instrument [Line Items]
Carrying Amount	$ 400.0		$ 400.0
Debt instrument, interest rate (as a percent)	3.49%		3.07%
Term Loan “B” Facility due 2023, interest payable monthly at 3.99% and 3.57%, respectively
Debt Instrument [Line Items]
Carrying Amount	$ 1,134.5		$ 1,204.5
Debt discount	(9.8)		(12.5)
Debt issuance costs	$ (20.3)		$ (25.8)
Debt instrument, interest rate (as a percent)	3.99%		3.57%
Debt discount	$ 9.8		$ 12.5
Debt issuance costs	20.3		25.8
Note payable to SMBC due 2016 through 2018, interest payable quarterly at 0% and 3.09%, respectively
Debt Instrument [Line Items]
Carrying Amount	$ 0.0		$ 122.7
Debt instrument, interest rate (as a percent)	0.00%		3.09%
Other long-term debt
Debt Instrument [Line Items]
Capital lease obligations	$ 100.6		$ 182.8
1.00% Notes
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent)	1.00%
1.00% Notes | Convertible Debt
Debt Instrument [Line Items]
Carrying Amount	$ 690.0		690.0
Debt discount	(47.0)		(62.0)
Debt issuance costs	$ (6.5)		(8.6)
Debt instrument, interest rate (as a percent)	1.00%			1.00%
Debt discount	$ 47.0		62.0
Debt issuance costs	6.5		8.6
1.625% Notes | Convertible Debt
Debt Instrument [Line Items]
Carrying Amount	575.0		575.0
Debt discount	(92.7)		(104.3)
Debt issuance costs	$ (8.9)		(10.0)
Debt instrument, interest rate (as a percent)	1.625%
Debt discount	$ 92.7		104.3
Debt issuance costs	$ 8.9		$ 10.0
Minimum | Other long-term debt
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent)	1.00%
Maximum | Other long-term debt
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent)	4.00%

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