Fair Value (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Available-for-sale securities	$ 2.5		$ 2.5
Money market funds	0.1		0.5
Carrying Amount [Member]
Available-for-sale securities	2.5		2.5
Money market funds	0.1		0.5
Debt maturing within one year	(180.8)	[1]	(188.0)	[1]
Long-term debt	(2,525.9)	[1]	(2,532.7)	[1]
Foreign exchange forward contracts	1.1		3.1
Fair Value [Member]
Available-for-sale securities	2.5		2.5
Money market funds	0.1		0.5
Debt maturing within one year	(180.8)	[1]	(188.0)	[1]
Long-term debt	(2,554.8)	[1]	(2,511.6)	[1]
Foreign exchange forward contracts	$ 1.1		$ 3.1

[1] (1) The carrying value of debt maturing within one year and long-term debt includes any related discount or premium and unamortized deferred gains on terminated interest-rate swap agreements, as applicable.