Shareholders' Equity (Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Shareholders' Equity [Abstract]
Unrealized gains on securities - Gross Balance	$ 5		$ 6
Unrealized gains on securities - Deferred Taxes	(2)	[1]	(2)	[1]
Unrealized gains on securities - Net Balance	3		4
Foreign currency translation adjustment - Gross Balance	951		1,040
Foreign currency translation adjustment - Deferred Taxes	(129)	[1]	(147)	[1]
Foreign currency translation adjustment - Net Balance	822		893
Pension plans - Gross Balance	(4,532)	[2]	(3,457)	[2]
Pension plans - Deferred Taxes	1,542	[1],[2]	1,178	[1],[2]
Pension plans - Net Balance	(2,990)	[2]	(2,279)	[2]
Other post-retirement plans - Gross Balance	(264)	[2]	(210)	[2]
Other post-retirement plans - Deferred Taxes	92	[1],[2]	72	[1],[2]
Other post-retirement plans - Net Balance	(172)	[2]	(138)	[2]
Gains on cash flow hedges - Gross Balance	31		112
Gains on cash flow hedges - Deferred Taxes	(6)	[1]	(28)	[1]
Gains on cash flow hedges - Net Balance	25		84
Accumulated other comprehensive income - Gross Balance	3,809		2,509
Accumulated other comprehensive income - Deferred Taxes	1,497	[1]	1,073	[1]
Total AOCI - Net Balance	(2,312)		(1,436)
Income tax expense (benefit) in other comprehensive income	$ 424		$ (251)		$ (244)

[1] The amount of income tax expense (benefit) reported in other comprehensive income was $244 in 2009, ($251) in 2010 and ($424) in 2011.

[2] We recognize an asset or liability on the balance sheet for the full funded status of our defined-benefit retirement plans. The difference between the cumulative benefit cost recognized and the full funded status of these plans is recorded directly to AOCI, net of tax. See Note P for further discussion.