Pension and Other Postretirement Benefits - Asset Allocations (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
Domestic [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	61.00%
Actual Plan Asset Allocations	58.00%	52.00%
Domestic [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	32.00%
Actual Plan Asset Allocations	40.00%	39.00%
Domestic [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	7.00%
Actual Plan Asset Allocations	2.00%	9.00%
Percentage of Domestic Pension Assets	2.00%	9.00%
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	100.00%
Actual Plan Asset Allocations	100.00%	100.00%
Foreign [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	18.00%
Actual Plan Asset Allocations	17.00%	17.00%
Foreign [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations	82.00%
Actual Plan Asset Allocations	83.00%	83.00%