Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Receivables, allowances	$ 108.9	$ 95.4
Ordinary shares, par value (in dollars)	$ 1	$ 1.00
Ordinary shares, shares authorized (in shares)	618,300,000	618,300,000
Common Stock, Shares, Issued		447,100,000
Ordinary shares, shares outstanding (in shares)	449,500,000	447,100,000
Canceled shares (in shares)	0	4,000,000.0
Ordinary shares, held in employee benefit trust (in shares)	0	100,000