Retirement Plans (Fair Values Pension Plan Assets By Asset Class) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ (10,706)	$ 10,111
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	181	171	155
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(2,634)	(2,371)
Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(5,395)	(5,343)
Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(2,677)	(2,397)
Fixed Income Common Collective Funds [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(180)
Fixed Income Common Collective Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fixed Income Common Collective Funds [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(180)
Fixed Income Common Collective Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Corporate Bonds [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,248)	(1,539)
Corporate Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate Bonds [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,248)	(1,539)
Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Government Securities [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,097)	(1,593)
Government Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Government Securities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,097)	(1,593)
Government Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mortgage Backed Securities [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(143)	(127)
Mortgage Backed Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mortgage Backed Securities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(143)	(127)
Mortgage Backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other Fixed Income [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(74)	(75)
Other Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	0
Other Fixed Income [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(65)	(67)
Other Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(10)	(8)
Commodities [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(193)	(216)
Commodities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Commodities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(193)	(216)
Commodities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Hedge Funds [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(831)	(492)
Hedge Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Hedge Funds [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Hedge Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(831)	(492)
Private Equity Funds [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(484)	(503)
Private Equity Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Private Equity Funds [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Private Equity Funds [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(484)	(503)
Real Estate [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,038)	(1,037)
Real Estate [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,038)	(1,037)
Derivatives [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(313)	(354)
Derivatives [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Derivatives [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Derivatives [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(313)	(354)
Cash And Cash Equivalents [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(506)	(311)
Cash And Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10	15
Cash And Cash Equivalents [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(516)	(326)
Cash And Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non-US [Member] | Equity Securities [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(2,313)	(1,513)
Non-US [Member] | Equity Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,470)	(1,145)
Non-US [Member] | Equity Securities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(843)	(368)
Non-US [Member] | Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
United States [Member] | Equity Securities [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(2,466)	(2,171)
United States [Member] | Equity Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,175)	(1,241)
United States [Member] | Equity Securities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(1,290)	(927)
United States [Member] | Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ (1)	$ (3)