Intangible Assets and Goodwill - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 140.5	$ 139.5
Accumulated amortization	(82.6)	(70.9)
Intangible assets, net	57.9	68.6
Amortization expense	12.9us-gaap_AmortizationOfIntangibleAssets	13.2us-gaap_AmortizationOfIntangibleAssets	23.9us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Future estimated amortization expense, 2015	12.1
Future estimated amortization expense, 2016	9.9
Future estimated amortization expense, 2017	8.7
Future estimated amortization expense, 2018	6.6
Future estimated amortization expense, 2019	6.2
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	34.2	34.3
Accumulated amortization	(14.0)	(9.2)
Intangible assets, net	20.2	25.1
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	60.1	58.5
Accumulated amortization	(55.3)	(53.3)
Intangible assets, net	4.8	5.2
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	20.0	20.4
Accumulated amortization	(3.7)	(2.1)
Intangible assets, net	16.3	18.3
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	26.2	26.3
Accumulated amortization	(9.6)	(6.3)
Intangible assets, net	$ 16.6	$ 20.0

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References