Operating Information by Segment and Geographic Area - External Revenue and Total Assets by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 4,118,556	$ 4,133,612
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,445,000	1,905,700
Asia Pacific (including Australia)
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	326,600	419,900
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	671,700	1,010,600
Central and South America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	507,300	454,000
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 168,000	$ 343,400