Retirement Programs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Pension Plan Payments [Abstract]
Pension Contributions	$ 106	$ 8
2012 estimated pension payments	120
Scenario, Forecast [Member]
Defined Benefit Plan Disclosure Line Items
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements	7
Pensions
Defined Benefit Plan Disclosure Line Items
Service cost	13	11
Interest cost	31	31
Expected return on plan assets	(39)	(38)
Net amortization and deferral	17	11
Net periodic benefit cost	22	15
OPEB
Defined Benefit Plan Disclosure Line Items
Service cost	1	1
Interest cost	3	4
Net amortization and deferral	(1)	(2)
Net periodic benefit cost	$ 3	$ 3