Employee Benefit Plans (Details 11)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit [Member] | Defined Benefit Plan [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities	100.00%	100.00%
United States Pension Plans of US Entity, Defined Benefit [Member] | Defined Benefit Plan [Member] | Fixed maturity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	75.00%
Total securities	69.00%	59.00%
United States Pension Plans of US Entity, Defined Benefit [Member] | Defined Benefit Plan [Member] | Equity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	12.00%
Total securities	21.00%	24.00%
United States Pension Plans of US Entity, Defined Benefit [Member] | Defined Benefit Plan [Member] | Alternative securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	13.00%
Total securities	10.00%	17.00%
Foreign Pension Plans, Defined Benefit [Member] | Defined Benefit Plan [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities	100.00%	100.00%
Foreign Pension Plans, Defined Benefit [Member] | Defined Benefit Plan [Member] | Fixed maturity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	64.00%
Total securities	54.00%	52.00%
Foreign Pension Plans, Defined Benefit [Member] | Defined Benefit Plan [Member] | Equity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	17.00%
Total securities	24.00%	23.00%
Foreign Pension Plans, Defined Benefit [Member] | Defined Benefit Plan [Member] | Alternative securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	19.00%
Total securities	22.00%	25.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Medical [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities	100.00%	100.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Medical [Member] | Fixed maturity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	70.00%
Total securities	63.00%	62.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Medical [Member] | Equity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	30.00%
Total securities	37.00%	37.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Medical [Member] | Alternative securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	0.00%
Total securities	0.00%	1.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Life [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities	100.00%	100.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Life [Member] | Fixed maturity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	0.00%
Total securities	0.00%	0.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Life [Member] | Equity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	0.00%
Total securities	0.00%	0.00%
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Postretirement Life [Member] | Alternative securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	100.00%
Total securities	100.00%	100.00%
Foreign Postretirement Benefit Plans, Defined Benefit [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities	100.00%	100.00%
Foreign Postretirement Benefit Plans, Defined Benefit [Member] | Fixed maturity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	100.00%
Total securities	100.00%	100.00%
Foreign Postretirement Benefit Plans, Defined Benefit [Member] | Equity securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	0.00%
Total securities	0.00%	0.00%
Foreign Postretirement Benefit Plans, Defined Benefit [Member] | Alternative securities [Member]
Actual weighted average asset allocation by major asset class for the Invested Plans
Total securities, Target	0.00%
Total securities	0.00%	0.00%