Commitments and Contingent Liabilities (Guarantees) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Indemnification Agreements [Member]	Dec. 31, 2012 Indemnification Agreements [Member]	Jun. 30, 2013 Customer and Supplier Guarantee [Member]		Jun. 30, 2013 Customer and Supplier Guarantee, Bank Borrowings [Member] Y		Jun. 30, 2013 Customer and Supplier Guarantee, Equipment and Facility Leases [Member] Y		Jun. 30, 2013 Equity Affiliates, Bank Borrowings [Member] Y		Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member]	Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member]		Jun. 30, 2013 Guaranteed Obligations, Short-Term [Member] Equity Affiliates, Bank Borrowings [Member]		Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member]	Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Customer and Supplier Guarantee, Equipment and Facility Leases [Member]		Jun. 30, 2013 Guaranteed Obligations, Long-Term [Member] Equity Affiliates, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Indemnifications, carrying amount			$ 34	$ 31
Guarantee obligations	$ 499	$ 535			$ 316	[1]	$ 315	[1]	$ 1	[1]	$ 183	[2]	$ 356	$ 174	[1]	$ 0	[1]	$ 182	[2]	$ 143	$ 141	[1]	$ 1	[1]	$ 1	[2]
Collateral assets and personal guarantees percentage					48.00%
Guaranteed obligations, maximum term							8		4		2

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

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