Financial Instruments - Schedule of Derivative Contracts on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the consolidated statement of operations in which the effects of cash flow hedges are recorded in revenue	$ 1,434,788	$ 1,511,983	$ 1,615,519
Operating Expenses	748,385	792,887	891,988
Total amounts presented in the consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	1,007,116	908,404	924,618
Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the consolidated statement of operations in which the effects of cash flow hedges are recorded in revenue	1,434,788	1,511,983	1,615,519
Total amounts presented in the consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	748,385	792,887	891,988
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains on Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	0	0	(1,405)
Gain (loss) on foreign exchange contracts designated as cash flow hedges reclassified from OCI into revenue	$ 0	$ 8,405	$ (18,532)