Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Short term investments, fair value	$ 28,221	$ 35,879
Allowance for doubtful accounts	32,474	17,830
Short-term finance receivables allowance	20,999	12,556
Long-term finance receivables allowance	17,115	7,095
Other assets, fair value	$ 264,500	$ 230,442
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	480,000,000	480,000,000
Common stock, shares issued (in shares)	323,337,912	323,337,912
Treasury stock (in shares)	151,737,399	152,888,969