Commitments and Contingent Liabilities (Guarantees) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Customer and Supplier Guarantee [Member]		Sep. 30, 2013 Customer and Supplier Guarantee, Bank Borrowings [Member] Y		Sep. 30, 2013 Customer and Supplier Guarantee, Equipment and Facility Leases [Member] Y		Sep. 30, 2013 Equity Affiliates, Bank Borrowings [Member] Y		Sep. 30, 2013 Guarantee Obligations, Long Term [Member]	Sep. 30, 2013 Guarantee Obligations, Long Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Sep. 30, 2013 Guarantee Obligations, Long Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member]		Sep. 30, 2013 Guarantee Obligations, Long Term [Member] Equity Affiliates, Bank Borrowings [Member]		Sep. 30, 2013 Guaranteed Obligations Short Term [Member]	Sep. 30, 2013 Guaranteed Obligations Short Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Sep. 30, 2013 Guaranteed Obligations Short Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member]		Sep. 30, 2013 Guaranteed Obligations Short Term [Member] Equity Affiliates, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Guarantee obligations	$ 502	$ 535	$ 320	[1]	$ 319	[1]	$ 1	[1]	$ 182	[2]	$ 134	$ 132	[1]	$ 1	[1]	$ 1	[2]	$ 368	$ 187	[1]	$ 0	[1]	$ 181	[2]
Collateral assets and personal guarantees percentage			44.00%
Guaranteed obligations, maximum term					7		4		2

[1] Existing guarantees for customers and suppliers, as part of contractual agreements.

[2] Existing guarantees for equity affiliates' liquidity needs in normal operations.