Derivative Instruments - Balance Sheet Classification (Details) $ in Thousands, € in Millions	Jun. 30, 2019 USD ($)	Jun. 30, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)	Jun. 30, 2018 USD ($)	Jun. 30, 2018 EUR (€)
Derivatives, Fair Value
Total asset derivatives	$ 46,000		$ 25,000		$ 20,000
Total liability derivatives	40,000		12,000		22,000
Current derivative asset	13,000		19,000		13,000
Current derivative liability	3,000		3,000		3,000
Noncurrent derivative asset	33,000		6,000		7,000
Noncurrent derivative liability	37,000		9,000		19,000
Derivatives designated as hedging instruments
Derivatives, Fair Value
Total asset derivatives	44,000		23,000		18,000
Total liability derivatives	39,000		10,000		20,000
Derivatives designated as hedging instruments | Commodity forwards contracts
Derivatives, Fair Value
Notional amount	19,000		21,000		21,000
Total asset derivatives	2,000		1,000		7,000
Total liability derivatives	1,000
Derivatives designated as hedging instruments | Interest rate swaps - fair value hedges
Derivatives, Fair Value
Notional amount | €		€ 725		€ 725		€ 725
Total asset derivatives	15,000		6,000		6,000
Total liability derivatives			1,000		8,000
Derivatives designated as hedging instruments | Interest rate swaps - cash flow hedges
Derivatives, Fair Value
Notional amount	480,000		180,000		180,000
Total asset derivatives	1,000
Total liability derivatives	2,000
Derivatives designated as hedging instruments | Cash flow hedges of foreign exchange risk
Derivatives, Fair Value
Notional amount	1,210,000		587,000		310,000
Total asset derivatives	20,000		10,000		5,000
Total liability derivatives	30,000		1,000		12,000
Derivatives designated as hedging instruments | Net investment hedges
Derivatives, Fair Value
Notional amount | €		€ 160		€ 160
Total asset derivatives	6,000		6,000
Total liability derivatives	6,000		8,000
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivatives, Fair Value
Notional amount	292,000		470,000		380,000
Total asset derivatives	2,000		2,000		2,000
Total liability derivatives	$ 1,000		$ 2,000		$ 2,000