Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Receivables, allowances	$ 130.9	$ 117.4
Property, plant and equipment, accumulated depreciation	2,063.2	1,947.9
Intangible assets, accumulated amortization	$ 535.1	$ 486.9
Ordinary shares, par value (in dollars)	$ 1	$ 1.00
Ordinary shares, shares authorized (in shares)	618.3	525.0
Ordinary shares, shares issued (in shares)	462.2	465.1
Ordinary shares, shares outstanding (in shares)	462.2	465.1
Canceled shares (in shares)	3.0	2.1
Ordinary shares, held in employee benefit trust (in shares)	0.1	0.1