Employee Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended					3 Months Ended	9 Months Ended	12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2011 Accumulated Defined Benefit Plans Adjustment [Member]	Mar. 31, 2012 U.S. Pension Plan [Member]	Dec. 31, 2012 U.S. Pension Plan [Member]	Dec. 31, 2012 U.S. Pension Plan [Member]	Dec. 31, 2011 U.S. Pension Plan [Member]	Dec. 31, 2012 Primary U.S. And Non-U.S. Defined Benefit Plans [Member]	Dec. 31, 2011 Primary U.S. And Non-U.S. Defined Benefit Plans [Member]	Dec. 31, 2012 SERPs [Member]	Dec. 31, 2012 DC SERP [Member]	Dec. 31, 2011 DC SERP [Member]	Dec. 31, 2010 DC SERP [Member]	Dec. 31, 2012 Post-Retirement Plan [Member]	Dec. 31, 2011 Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets								6.75%		6.75%	7.25%					0.00%	0.00%
Accumulated benefit obligation	$ 1,100	$ 960					$ 947	$ 947	$ 872
Expected employer contributions to U.S. and Non-U.S. defined benefit pension plans, SERPs and post-retirement plan										7		15				8
Plan assets	814	674		810	671
Projected benefit obligations	1,100	981
Health care cost trend rates increase	1.00%
Health care cost trend rates decrease	1.00%
Post-retirement benefit obligation increase	7.00%
Post-retirement benefit obligation decrease	6.00%
Aggregate expense for service and interest costs increase	11.00%
Aggregate expense for service and interest costs decrease	9.00%
Expenses related to pre-tax salary- U.S employees	70	77	71
Defined Contribution Plan, Employer Matching Contribution, Percent						6.00%	5.00%
Expenses related to pre-tax salary- Non-U.S employees	65	65	45
Recorded compensation and employee benefits expense	$ 139	$ 103	$ 95										$ 11	$ 10	$ 10