Finance Assets (Credit Quality) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Sales-type lease receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 1,315,608	$ 1,361,315
Sales-type lease receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	1,023,549	1,088,053
Loan receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	373,865	406,863
Loan receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 339,373	374,147
Low
Accounts, Notes, Loans and Financing Receivable [Line Items]
Approximate percentage of portfolio	30.00%
Low | Sales-type lease receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 819,776	879,823
Low | Loan receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 262,646	296,598
Medium
Accounts, Notes, Loans and Financing Receivable [Line Items]
Approximate percentage of portfolio	40.00%
Medium | Sales-type lease receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 148,000	135,953
Medium | Loan receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 56,744	53,647
High
Accounts, Notes, Loans and Financing Receivable [Line Items]
Approximate percentage of portfolio	30.00%
High | Sales-type lease receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 21,728	22,600
High | Loan receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	6,791	7,216
Not Scored | Sales-type lease receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	34,045	49,677
Not Scored | Loan receivables | North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 13,192	$ 16,686