CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 41,542	$ 38,113
Other intangible assets, accumulated amortization	$ 88,302	$ 68,249
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, authorized (in shares)	20,000,000	20,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized (in shares)	480,000,000	480,000,000
Common stock, issued (in shares)	179,206,000	179,232,000
Common stock, outstanding (in shares)	129,186,000	134,298,000
Treasury stock (in shares)	50,020,000	44,934,000