Commitments and Contingent Liabilities (Guarantees) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Indemnification Agreements [Member]	Dec. 31, 2011 Indemnification Agreements [Member]	Jun. 30, 2012 Customer and Supplier Guarantee, Bank Borrowings [Member] Y		Jun. 30, 2012 Equity Affiliates, Bank Borrowings [Member] Y		Jun. 30, 2012 Guaranteed Obligations, Short-Term [Member]	Jun. 30, 2012 Guaranteed Obligations, Short-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Jun. 30, 2012 Guaranteed Obligations, Short-Term [Member] Equity Affiliates, Bank Borrowings [Member]		Jun. 30, 2012 Guaranteed Obligations, Long-Term [Member]	Jun. 30, 2012 Guaranteed Obligations, Long-Term [Member] Customer and Supplier Guarantee, Bank Borrowings [Member]		Jun. 30, 2012 Guaranteed Obligations, Long-Term [Member] Equity Affiliates, Bank Borrowings [Member]
Guarantor Obligations [Line Items]
Indemnifications, carrying amount			$ 241	$ 105
Guarantee obligations	$ 485	$ 563			$ 287	[1]	$ 198	[2]	$ 365	$ 167	[1]	$ 198	[2]	$ 120	$ 120	[1]	$ 0	[2]
Collateral assets and personal guarantees percentage					48.00%
Guaranteed obligations, maximum term					5		1

[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.