Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total long-term Debt	$ 2,044,417	$ 3,572,058
Unamortized discount and debt issuance costs	(15,062)	(20,332)
Current portion of long-term debt	623	804,677
Long-term debt	$ 2,043,794	2,767,381
1.875% Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	1.875%
Unsecured debt \| 1.125% Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 450,103	$ 610,800
Debt instrument, interest rate	1.125%	1.125%
Unsecured debt \| 1.625% Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 596,750	$ 610,800
Debt instrument, interest rate	1.625%	1.625%
Unsecured debt \| Floating Rate Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 0	$ 200,000
Senior notes \| 1.875% Senior Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 0	$ 480,007
Debt instrument, interest rate	1.875%	1.875%
Senior notes \| 3.45% Senior Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 171,612	$ 300,000
Debt instrument, interest rate	3.45%	3.45%
Senior notes \| 4.15% Senior Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 425,000	$ 425,000
Debt instrument, interest rate	4.15%	4.15%
Senior notes \| 5.45% Senior Notes
Debt Instrument [Line Items]
Total long-term Debt	$ 350,000	$ 350,000
Debt instrument, interest rate	5.45%	5.45%
Credit facilities
Debt Instrument [Line Items]
Total long-term Debt	$ 0	$ 223,900
Commercial paper notes
Debt Instrument [Line Items]
Total long-term Debt	0	325,000
Variable-rate foreign bank loans
Debt Instrument [Line Items]
Total long-term Debt	7,222	7,702
Finance lease obligations
Debt Instrument [Line Items]
Total long-term Debt	$ 58,792	$ 59,181

Contractual interest rate for funds borrowed, under the debt agreement.

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