Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Short term investments, fair value	$ 21,185	$ 35,879
Allowance for doubtful accounts	29,669	17,830
Short-term finance receivables allowance	21,289	12,556
Long-term finance receivables allowance	16,779	7,095
Other assets, fair value	$ 418,100	$ 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)	151,413,053	152,888,969