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Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands					12 Months Ended
	Mar. 29, 2018 USD ($)	Mar. 29, 2018 AUD ($)	Mar. 27, 2018 AUD ($)	Sep. 28, 2016 AUD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 AUD ($)	Dec. 31, 2018 AUD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)					$ 8,751,544	$ 8,229,430
Net proceeds from sales of senior notes					987,500	0	$ 2,656,948
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)			$ 350,000	$ 250,000	226,924	233,955
Amount of quarterly installments based on the original principal			$ 8,750	$ 6,250
Par	99.00%	99.00%
Net proceeds from sales of senior notes	$ 75,600	$ 99,000
Fair Value					$ 228,156	$ 235,645		$ 325,313	$ 334,063
Effective interest rate (as a percent)					4.80%	6.00%		4.80%	6.00%
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			3.875%	4.30%

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- Definition

Debt Instrument, Par, Percentage

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No definition available.

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- Definition

Represents the amount of payments due as a percentage of the original principal amount.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

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