Retirement Benefit Plans - Asset Allocations (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	100.00%	100.00%
Non-U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	100.00%	100.00%
Cash and Cash Equivalents [Member] | U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	9.00%	11.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	5.00%
Target allocation percentage of assets, fixed income securities, range maximum	15.00%
Cash and Cash Equivalents [Member] | Non-U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	6.00%	8.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	2.00%
Target allocation percentage of assets, fixed income securities, range maximum	8.00%
Fixed Income Funds [Member] | U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	56.00%	54.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	45.00%
Target allocation percentage of assets, fixed income securities, range maximum	65.00%
Fixed Income Funds [Member] | Non-U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	38.00%	41.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	37.00%
Target allocation percentage of assets, fixed income securities, range maximum	43.00%
Equity Securities [Member] | U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	35.00%	35.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	25.00%
Target allocation percentage of assets, fixed income securities, range maximum	45.00%
Equity Securities [Member] | Non-U.S. Plans:
Defined Benefit Plan, Assets for Plan Benefits [Abstract]
Fixed income securities	56.00%	51.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target allocation percentage of assets, fixed income securities, range minimum	52.00%
Target allocation percentage of assets, fixed income securities, range maximum	58.00%