Pension Benefit Plans and Other Postretirement Benefits (Details 5) (USD $) In Millions, unless otherwise specified							12 Months Ended
	Dec. 31, 2012 U.S Pension Plans	Dec. 31, 2011 U.S Pension Plans	Dec. 31, 2010 U.S Pension Plans	Dec. 31, 2012 Non-U.S. Pension Plans	Dec. 31, 2011 Non-U.S. Pension Plans	Dec. 31, 2010 Non-U.S. Pension Plans	Dec. 31, 2012 Equity securities U.S Pension Plans	Dec. 31, 2011 Equity securities U.S Pension Plans	Dec. 31, 2012 Equity securities Non-U.S. Pension Plans Minimum	Dec. 31, 2012 Equity securities Non-U.S. Pension Plans Maximum	Dec. 31, 2012 Debt securities U.S Pension Plans	Dec. 31, 2011 Debt securities U.S Pension Plans	Dec. 31, 2012 Debt securities Non-U.S. Pension Plans Minimum	Dec. 31, 2012 Debt securities Non-U.S. Pension Plans Maximum	Dec. 31, 2012 Real estate Non-U.S. Pension Plans Minimum	Dec. 31, 2012 Real estate Non-U.S. Pension Plans Maximum	Dec. 31, 2012 Other Non-U.S. Pension Plans Minimum	Dec. 31, 2012 Other Non-U.S. Pension Plans Maximum	Dec. 31, 2012 Level 1 Non-U.S. Pension Plans	Dec. 31, 2011 Level 1 Non-U.S. Pension Plans	Dec. 31, 2012 Level 1 Cash and cash equivalents Non-U.S. Pension Plans	Dec. 31, 2011 Level 1 Cash and cash equivalents Non-U.S. Pension Plans	Dec. 31, 2012 Level 1 Equity securities Non-U.S. Pension Plans	Dec. 31, 2011 Level 1 Equity securities Non-U.S. Pension Plans	Dec. 31, 2012 Level 1 Debt securities Non-U.S. Pension Plans	Dec. 31, 2011 Level 1 Debt securities Non-U.S. Pension Plans	Dec. 31, 2012 Level 1 Other Non-U.S. Pension Plans	Dec. 31, 2011 Level 1 Other Non-U.S. Pension Plans	Dec. 31, 2012 Level 2 Non-U.S. Pension Plans	Dec. 31, 2011 Level 2 Non-U.S. Pension Plans	Dec. 31, 2012 Level 2 Cash and cash equivalents Non-U.S. Pension Plans	Dec. 31, 2011 Level 2 Cash and cash equivalents Non-U.S. Pension Plans	Dec. 31, 2012 Level 2 Equity securities Non-U.S. Pension Plans	Dec. 31, 2011 Level 2 Equity securities Non-U.S. Pension Plans	Dec. 31, 2012 Level 2 Debt securities Non-U.S. Pension Plans	Dec. 31, 2011 Level 2 Debt securities Non-U.S. Pension Plans	Dec. 31, 2012 Level 2 Other Non-U.S. Pension Plans	Dec. 31, 2011 Level 2 Other Non-U.S. Pension Plans	Dec. 31, 2012 Level 3 Non-U.S. Pension Plans	Dec. 31, 2011 Level 3 Non-U.S. Pension Plans	Dec. 31, 2010 Level 3 Non-U.S. Pension Plans	Dec. 31, 2012 Level 3 Debt securities Non-U.S. Pension Plans	Dec. 31, 2011 Level 3 Debt securities Non-U.S. Pension Plans	Dec. 31, 2012 Level 3 Real estate Non-U.S. Pension Plans	Dec. 31, 2011 Level 3 Real estate Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Percentage of U.S. pension plan assets classified as Level 2 assets							72.00%	72.00%			28.00%	28.00%
Plan assets at fair value	$ 2,175	$ 2,011	$ 2,195	$ 1,527	$ 1,325	$ 1,279													$ 1,135	$ 1,021	$ 36	$ 21	$ 367	$ 340	$ 714	$ 645	$ 18	$ 15	$ 374	$ 288	$ 20	$ 5	$ 173	$ 146	$ 113	$ 101	$ 68	$ 36	$ 18	$ 16	$ 19	$ 3	$ 5	$ 15	$ 11
Target allocation percentage									45.00%	55.00%			40.00%	50.00%	0.00%	10.00%	0.00%	10.00%