Retirement Plans (Retirement Plans, Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Expense for the defined contribution plans for continuing operations	$ 293		$ 245		$ 196
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at end of period	1,000		928
Fair value of plan assets at end of period	754		705
Funded status at end of period	276		223
Accumulated benefit obligation at end of period	961		868
Amounts recognized on the Consolidated Balance Sheets
Accrued employee compensation and benefits	10		10
Employee compensation and benefits	266		213
Pension plans in which projected benefit obligation exceeded plan assets
Projected benefit obligation	1,004		928
Fair value of plan assets	727		705
Pension plans in which accumulated benefit obligation exceeded plan assets
Accumulated benefit obligation	935		784
Fair value of plan assets	726		621
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	754		705
Foreign Pension Plans, Defined Benefit | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	204	[1]	241	[1]
Foreign Pension Plans, Defined Benefit | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	112	[1]	110	[1]
Foreign Pension Plans, Defined Benefit | Balanced funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	13	[1]	12	[1]
Foreign Pension Plans, Defined Benefit | Non-United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	107		89
Foreign Pension Plans, Defined Benefit | United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	110		67
Foreign Pension Plans, Defined Benefit | Corporate bonds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	130		64
Foreign Pension Plans, Defined Benefit | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	78		122
Foreign Pension Plans, Defined Benefit | Level 1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	267		146
Foreign Pension Plans, Defined Benefit | Level 1 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 1 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 1 | Balanced funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 1 | Non-United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 1 | United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	110		67
Foreign Pension Plans, Defined Benefit | Level 1 | Corporate bonds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	130		64
Foreign Pension Plans, Defined Benefit | Level 1 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	27		15
Foreign Pension Plans, Defined Benefit | Level 2
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	452		468
Foreign Pension Plans, Defined Benefit | Level 2 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	204	[1]	241	[1]
Foreign Pension Plans, Defined Benefit | Level 2 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	112	[1]	110	[1]
Foreign Pension Plans, Defined Benefit | Level 2 | Balanced funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	13	[1]	12	[1]
Foreign Pension Plans, Defined Benefit | Level 2 | Non-United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	107		89
Foreign Pension Plans, Defined Benefit | Level 2 | United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 2 | Corporate bonds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 2 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	16		16
Foreign Pension Plans, Defined Benefit | Level 3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	35		91
Foreign Pension Plans, Defined Benefit | Level 3 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 3 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 3 | Balanced funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0	[1]	0	[1]
Foreign Pension Plans, Defined Benefit | Level 3 | Non-United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 3 | United States equity securities
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 3 | Corporate bonds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	0		0
Foreign Pension Plans, Defined Benefit | Level 3 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	$ 35		$ 91
United Kingdom Pension Plan
Pension plans in which accumulated benefit obligation exceeded plan assets
United Kingdom pension plan percentage of international pension plans' projected benefit obligations	78.00%
United Kingdom Pension Plan | Equity securities
Pension plans in which accumulated benefit obligation exceeded plan assets
Target asset allocation percentage	65.00%
United Kingdom Pension Plan | Fixed income securities
Pension plans in which accumulated benefit obligation exceeded plan assets
Target asset allocation percentage	35.00%

[1] Strategies are generally to invest in equity or debt securities, or a combination thereof, that match or outperform certain predefined indices.