Related Party Transactions (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 2,800,000
Investments in retail finance joint ventures	5,800,000	$ 800,000	$ 4,500,000
Dividends from related parties	$ 29,400,000	78,500,000
Rabobank
Related Party Transaction [Line Items]
Ownership interest of controlling interest	51.00%
Finance joint ventures
Related Party Transaction [Line Items]
Investments in retail finance joint ventures	$ 0		0
TAFE
Related Party Transaction [Line Items]
Cost method investment, ownership percentage	23.75%
Beneficial ownership of related parties (in shares)	12,150,152
Beneficial ownership of related parties, maximum shares allowed per letter agreement (in shares)	12,170,290
Purchases from related party	$ 109,600,000	102,000,000	128,500,000
Revenue from related parties	1,800,000	1,200,000	1,100,000
Dividends from related parties	1,800,000		1,600,000
Praxair Inc
Related Party Transaction [Line Items]
Purchases from related party	1,600,000	1,500,000	2,000,000
PPG Industries, Inc.
Related Party Transaction [Line Items]
Purchases from related party	$ 3,500,000	$ 7,200,000	$ 3,100,000

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Beneficial Ownership of Related Parties, Shares

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Dividends from Related Parties

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Ownership Interest of Controlling Interest

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The fair value as of the balance sheet date of firm holdings in private equity, mezzanine, venture capital, merchant banking, real estate and special situations investments. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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-Publisher FASB
-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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