Long-Term Debt (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total long-term debt	[1]	$ 3,513,183	$ 3,817,157
Current portion of long-term debt		493,705	674,994
Long-term debt		3,019,478	3,142,163
Term loan facilities | September 2015 Term Loan Agreement
Debt Instrument [Line Items]
Total long-term debt		866,788	1,247,167
Senior Notes | 1.875% Senior Notes
Debt Instrument [Line Items]
Total long-term debt		764,623	759,151
Senior Notes | 3.00% Senior Notes
Debt Instrument [Line Items]
Total long-term debt		248,494	248,274
Senior Notes | 4.15% Senior Notes
Debt Instrument [Line Items]
Total long-term debt		420,897	420,654
Senior Notes | 4.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt		347,319	347,018
Senior Notes | 5.45% Senior Notes
Debt Instrument [Line Items]
Total long-term debt		345,610	345,532
Commercial Paper
Debt Instrument [Line Items]
Total long-term debt		477,164	351,349
Variable-rate foreign bank loans
Debt Instrument [Line Items]
Total long-term debt		42,260	77,452
Variable-rate domestic bank loans
Debt Instrument [Line Items]
Total long-term debt		0	20,479
Other long-term debt
Debt Instrument [Line Items]
Total long-term debt		$ 28	$ 81

[1] As of June 30, 2016 and December 31, 2015, $16.8 million and $20.3 million, respectively, of long-term debt was classified as Liabilities held for sale in the condensed consolidated balance sheets. See Note 3, “Divestitures,” for additional information.