Basis of Presentation and Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 3,661,579		$ 3,695,862
Short-term receivable, allowance for credit loss	66,300		53,400
Allowance for doubtful accounts	66,252		53,412
Increase to allowance for credit loss	6,000
Accounts receivable, noncurrent	114,000		118,500
Allowance for credit loss, noncurrent	100,900		$ 101,400
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ 7,300
Allowance for doubtful accounts	$ 6,900