Commitments and Contingent Liabilities Guarantees (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 292	$ 297
Customer Guarantee, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	[1]	$ 89
Guaranteed Obligations, Maximum Term, Years		4 years
Equity Affiliates Guarantee, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	[2]	$ 167
Guaranteed Obligations, Maximum Term, Months		6 months
Residual Value Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	[3]	$ 36
Guaranteed Obligations, Maximum Term, Years		11 years
Current Portion [Member] | Customer Guarantee, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 85

[1] Existing guarantees for select customers, as part of contractual agreements. The terms of the guarantees are equivalent to the terms of the customer loans that are primarily made to finance customer invoices. Of the total maximum future payments, $85 million

[2] Existing guarantees for non-consolidated affiliates' liquidity needs in normal operations.

[3] The company provides guarantees related to leased assets specifying the residual value that will be available to the lessor at lease termination through sale of the assets to the lessee or third parties.