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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Long-Term Debt Interest Rates (Details) $ in Thousands, € in Millions	3 Months Ended
	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Repayments of long-term debt		$ 751,209	$ 331,595
1.875% Senior Notes
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		$ 4,305		$ 7,823
Debt instrument, interest rate		1.875%		1.875%
3.00% Senior Notes
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		$ 0		$ 1,286
Debt instrument, interest rate		3.00%		3.00%
4.15% Senior Notes
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		$ 3,737		$ 3,859
Debt instrument, interest rate		4.15%		4.15%
4.50% Senior Notes
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		$ 1,116		$ 2,380
Debt instrument, interest rate		4.50%		4.50%
5.45% Senior Notes
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		$ 4,274		$ 4,313
Debt instrument, interest rate		5.45%		5.45%
Senior Notes \| 1.875% Senior Notes
Debt Instrument [Line Items]
Repayments of long-term debt \| €	€ 307.0
Senior Notes \| 3.00% Senior Notes
Debt Instrument [Line Items]
Repayments of long-term debt		$ 250,000
Senior Notes \| 4.50% Senior Notes
Debt Instrument [Line Items]
Repayments of long-term debt		$ 174,700