Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Accumulated depreciation on property, plant, and equipment	$ 654.7	$ 600.0
Accumulated amortization on other intangible assets	$ 1,021.7	$ 958.2
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	459,300,000	481,500,000
Common stock, shares outstanding (in shares)	459,300,000	481,500,000