Accounts and Notes Receivable and Credit Quality of Notes Receivable (Evaluation of Notes Receivable For Impairment) (Details) (Notes receivable, USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	$ 249.6us-gaap_NotesReceivableGross	$ 282.1us-gaap_NotesReceivableGross
Ending Balance Individually Evaluated for Impairment	149.3	157.1
Ending Balance Collectively Evaluated for Impairment	100.3	125.0
Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	82.1	95.3
Ending Balance Individually Evaluated for Impairment	37.7	36.1
Ending Balance Collectively Evaluated for Impairment	44.4	59.2
International
Financing Receivable, Recorded Investment, Past Due [Line Items]
Notes receivable	167.5	186.8
Ending Balance Individually Evaluated for Impairment	111.6	121.0
Ending Balance Collectively Evaluated for Impairment	$ 55.9	$ 65.8

The balance of financing receivables that were collectively evaluated for impairment.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

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- Definition

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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