Retirement Benefits (Summary of the U.S. and Non-U.S. Plan Investments Measured At Fair Value on a Recurring Basis) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 13,562,000,000	$ 12,225,000,000
Transfers from Level 1 to Level 2	0	0
Transfers from Level 2 to Level 1	0	0
Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,702,000,000	2,740,000,000
Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,353,000,000	8,055,000,000
Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,507,000,000	1,430,000,000
Common/Collective trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,938,000,000	5,392,000,000
Common/Collective trusts [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138,000,000	16,000,000
Common/Collective trusts [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,649,000,000	5,376,000,000
Common/Collective trusts [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	151,000,000	0
Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,334,000,000	2,237,000,000
Corporate Obligations [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate Obligations [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,330,000,000	2,236,000,000
Corporate Obligations [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,000,000	1,000,000
Corporate stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,440,000,000	2,018,000,000
Corporate stocks [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,434,000,000	2,005,000,000
Corporate stocks [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,000,000	4,000,000
Corporate stocks [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,000,000	9,000,000
Private equity/partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	801,000,000	828,000,000
Private equity/partnerships [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	2,000,000
Private equity/partnerships [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,000,000	2,000,000
Private equity/partnerships [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	799,000,000	824,000,000
Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	352,000,000	318,000,000
Government Securities [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,000,000	9,000,000
Government Securities [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	340,000,000	309,000,000
Government Securities [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,000,000	0
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	319,000,000	376,000,000
Real Estate [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	11,000,000
Real Estate [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,000,000	8,000,000
Real Estate [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	312,000,000	357,000,000
Short-term investment funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	839,000,000	414,000,000
Short-term investment funds [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	824,000,000	410,000,000
Short-term investment funds [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,000,000	4,000,000
Short-term investment funds [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Company common stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	261,000,000	276,000,000
Company common stock [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	261,000,000	276,000,000
Company common stock [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Company common stock [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	276,000,000	339,000,000
Other Investments [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	35,000,000	11,000,000
Other Investments [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,000,000	112,000,000
Other Investments [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	238,000,000	216,000,000
Insurance Group Annuity Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	23,000,000
Insurance Group Annuity Contracts [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Insurance Group Annuity Contracts [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Insurance Group Annuity Contracts [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	23,000,000
Swaps [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,000,000	4,000,000
Swaps [Member] | Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Swaps [Member] | Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,000,000	4,000,000
Swaps [Member] | Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0