Recently Issued Accounting Pronouncements - Impact of Adopting ASU 2017-07 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold	$ 2,721,066	$ 2,605,193	$ 7,734,393	$ 6,024,727
Selling, general and administrative expenses	1,273,066	1,307,402	3,795,492	3,472,202
Other expense (income) - net	$ 1,723	$ (10,262)	(8,688)	(28,192)
As Previously Reported (Without Adoption of ASU 2017-07)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold				6,021,752
Selling, general and administrative expenses				3,461,788
Other expense (income) - net				(14,803)
Impact of ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold			2,270
Selling, general and administrative expenses			9,079
Other expense (income) - net			$ (11,349)
Impact of ASU 2017-07 | Reclass for ASU 2017-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold				2,975
Selling, general and administrative expenses				10,414
Other expense (income) - net				$ (13,389)