Retirement Benefits (Schedule of Estimated Future Benefit Payments for Pension and Postretirement Benefits) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
U.S. Pension Benefits [Member]
2012	$ 197
2013	207
2014	218
2015	230
2016	242
2017-2021	1,395
Non- U.S Pension Benefits [Member]
2012	247
2013	253
2014	267
2015	283
2016	301
2017-2021	1,786
U.S. Postretirement Benefits [Member]
2012	11
2013	12
2014	12
2015	12
2016	12
2017-2021	61
Non- U.S Postretirement Benefits [Member]
2012	4
2013	4
2014	4
2015	4
2016	4
2017-2021	$ 25