Share-Based Payments (Options and Stock Appreciation Rights Outstanding) (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available For Grant, Beginning Balance	291,000
Shares Available For Grant, Exercised	0
Shares Available For Grant, Forfeited	0
Shares Available For Grant, Expired	0
Shares Available For Grant, Granted	0
Shares Available For Grant, Ending Balance	291,000
Shares/Awards
Balance at January 1, 2015	29,768
Exercised	0
Forfeited	(1,000)
Expired	0
Granted	0
Balance at June 30, 2015	28,768
Weighted-Average Exercise Price (usd per share)
Balance at January 1, 2015	$ 242.48
Exercised	0.00
Forfeited	255.13
Expired	0.00
Granted	0.00
Balance at June 30, 2015	$ 242.04
Compensation cost, liability balance	$ 7.3	$ 7.7
Cash received from exercise of options	0.6	0.6
Total fair value of shares vested	$ 0.0	0.2
Stock Appreciation Rights [Member]
Shares/Awards
Balance at January 1, 2015	92,186
Exercised	(3,975)
Forfeited	0
Granted	0
Balance at June 30, 2015	88,211.000
Weighted-Average Exercise Price (usd per share)
Balance at January 1, 2015	$ 157.71
Exercised	143.19
Forfeited	0.00
Granted	0.00
Balance at June 30, 2015	$ 158.36
Total intrinsic value of options exercised	$ 0.4	0.7
Total share-based liabilities paid	$ 0.4	$ 0.6