Intangible Assets and Goodwill (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amortizable intangible assets
Carrying Amount	$ 194.9	$ 197.2
Accumulated Amortization	57.5	44.5
Customer relationships
Amortizable intangible assets
Carrying Amount	168.3	169.4
Accumulated Amortization	47.0	36.0
Other
Amortizable intangible assets
Carrying Amount	26.6	27.8
Accumulated Amortization	$ 10.5	$ 8.5