Long-Term Debt Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total long-term debt	$ 2,369,262	$ 3,817,157	[1]
Current portion of long-term debt	247,544	674,994
Long-term debt	2,121,718	3,142,163
Term loan facilities | September 2015 Term Loan Agreement
Debt Instrument [Line Items]
Total long-term debt	0	1,247,167
Senior Notes | 1.875% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	719,617	759,151
Senior Notes | 3.00% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	248,714	248,274
Senior Notes | 4.15% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	421,141	420,654
Senior Notes | 4.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	347,620	347,018
Senior Notes | 5.45% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	345,687	345,532
Commercial Paper
Debt Instrument [Line Items]
Total long-term debt	247,503	351,349
Variable-rate foreign bank loans
Debt Instrument [Line Items]
Total long-term debt	38,939	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	$ 41	$ 81

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