Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 230,266	$ 44,287	$ 285,873	$ 53,779
Effective tax rates	46.00%	10.00%	32.00%	7.00%
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 58,000		$ 58,000		$ 48,000
Reduction in provision for income taxes due to impact of effective tax rate	54,000		54,000
Deferred tax assets classified as other non-current assets	522,000		522,000		564,000
Deferred tax assets, valuation allowance	126,000		126,000		$ 125,000
Other noncurrent liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	17,000		17,000
Other noncurrent assets
Income Tax Contingency [Line Items]
Unrecognized tax benefits	41,000		41,000
Accounting Standards Update 2016-09
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, share-based compensation, excess tax benefit	$ 46,000	$ 57,000	$ 87,000	$ 117,000