Employee Benefits (Plan's Assets Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Total assets carried at fair value	$ 1,112	$ 1,072
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Domestic large cap equity	64	144
Domestic small cap equity	15	16
Developed international equities	80	80
Emerging markets equity	23	42
Investment grade fixed-income	498	390
High yield fixed-income	39	32
Real estate investment trusts	23	24
Alternative investments (commingled fund)	5	5
Alternative investments (fund of funds)	27	14
Private equity	2	2
Cash		7
Total U.S. Pension Plan	776	756
U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Developed international equities	33	30
U.K. fixed-income	181	177
Emerging market index	9	9
Alternative investments	43	39
Total U.K. pension plan	266	255
Other Non-U.S. Pension Plans (Excluding U.K.)
Defined Benefit Plan Disclosure [Line Items]
Insurance group annuity contracts	70	61
Total Other Non-U.S. Pension Plans (Excluding U.K.)	70	61
Quoted Market Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets carried at fair value	0	0
Quoted Market Prices in Active Markets (Level 1) | U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Domestic large cap equity	0	0
Domestic small cap equity	0	0
Developed international equities	0	0
Emerging markets equity	0	0
Investment grade fixed-income	0	0
High yield fixed-income	0	0
Real estate investment trusts	0	0
Alternative investments (commingled fund)	0	0
Alternative investments (fund of funds)	0	0
Private equity	0	0
Cash		0
Total U.S. Pension Plan	0	0
Quoted Market Prices in Active Markets (Level 1) | U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Developed international equities	0	0
U.K. fixed-income	0	0
Emerging market index	0	0
Alternative investments	0	0
Total U.K. pension plan	0	0
Quoted Market Prices in Active Markets (Level 1) | Other Non-U.S. Pension Plans (Excluding U.K.)
Defined Benefit Plan Disclosure [Line Items]
Insurance group annuity contracts	0	0
Total Other Non-U.S. Pension Plans (Excluding U.K.)	0	0
Pricing Methods with Significant Observable Market Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets carried at fair value	965	951
Pricing Methods with Significant Observable Market Inputs (Level 2) | U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Domestic large cap equity	64	144
Domestic small cap equity	15	16
Developed international equities	80	80
Emerging markets equity	23	42
Investment grade fixed-income	498	390
High yield fixed-income	39	32
Real estate investment trusts	23	24
Alternative investments (commingled fund)	0	0
Alternative investments (fund of funds)	0	0
Private equity	0	0
Cash		7
Total U.S. Pension Plan	742	735
Pricing Methods with Significant Observable Market Inputs (Level 2) | U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Developed international equities	33	30
U.K. fixed-income	181	177
Emerging market index	9	9
Alternative investments	0	0
Total U.K. pension plan	223	216
Pricing Methods with Significant Observable Market Inputs (Level 2) | Other Non-U.S. Pension Plans (Excluding U.K.)
Defined Benefit Plan Disclosure [Line Items]
Insurance group annuity contracts	0	0
Total Other Non-U.S. Pension Plans (Excluding U.K.)	0	0
Pricing Methods with Significant Unobservable Market Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets carried at fair value	147	121
Pricing Methods with Significant Unobservable Market Inputs (Level 3) | U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Domestic large cap equity	0	0
Domestic small cap equity	0	0
Developed international equities	0	0
Emerging markets equity	0	0
Investment grade fixed-income	0	0
High yield fixed-income	0	0
Real estate investment trusts	0	0
Alternative investments (commingled fund)	5	5
Alternative investments (fund of funds)	27	14
Private equity	2	2
Cash		0
Total U.S. Pension Plan	34	21
Pricing Methods with Significant Unobservable Market Inputs (Level 3) | U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Developed international equities	0	0
U.K. fixed-income	0	0
Emerging market index	0	0
Alternative investments	43	39
Total U.K. pension plan	43	39
Pricing Methods with Significant Unobservable Market Inputs (Level 3) | Other Non-U.S. Pension Plans (Excluding U.K.)
Defined Benefit Plan Disclosure [Line Items]
Insurance group annuity contracts	70	61
Total Other Non-U.S. Pension Plans (Excluding U.K.)	$ 70	$ 61