CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Short-term investments	$ 2,658	$ 18,974
Accounts receivable allowance	11,168	18,899
Short-term finance receivables allowance	12,812	18,012
Long-term finance receivables allowance	13,406	17,857
Other assets	$ 318,754	$ 355,799
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized (in shares)	480,000,000	480,000,000
Common stock issued (in shares)	323,337,912	323,337,912
Treasury stock (in shares)	148,606,517	151,362,724