Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Receivables, allowances	$ 95.4	$ 119.6
Ordinary shares, par value (in dollars)	$ 1.00	$ 1
Ordinary shares, shares authorized (in shares)	618,300,000.0	618,300,000.0
Common Stock, Shares, Issued		450,500,000
Ordinary shares, shares outstanding (in shares)	447,100,000	450,500,000
Canceled shares (in shares)	4,000,000	14,800,000
Ordinary shares, held in employee benefit trust (in shares)	100,000	100,000