Recently Issued Accounting Pronouncements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction of net sales	$ (4,731,470)	$ (4,507,020)	$ (13,470,272)	$ (11,004,224)
Selling, general and administrative expenses	$ 1,273,066	$ 1,307,402	3,795,492	$ 3,472,202
Adjustment to initially apply ASU 2016-01					$ 2,320
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to initially apply ASU 2016-01					2,320
ASU 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction of net sales			(87,200)
Selling, general and administrative expenses			$ 87,200
ASU 2016-01 | Accumulated Other Comprehensive Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to initially apply ASU 2016-01					(2,300)
ASU 2016-01 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to initially apply ASU 2016-01					$ 2,320