Retirement Benefit Plans (Actual Allocation Percentage and Target Allocation Percentage for the U.S. Pension Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
U.S. Pension Plan | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	52.00%	52.60%
Target Allocations Range, Minimum	41.00%
Target Allocations Range, Maximum	62.00%
U.S. Pension Plan | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	12.50%	11.80%
Target Allocations Range, Minimum	10.00%
Target Allocations Range, Maximum	16.00%
U.S. Pension Plan | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	34.50%	34.60%
Target Allocations Range, Minimum	30.00%
Target Allocations Range, Maximum	40.00%
U.S. Pension Plan | Money market
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	1.00%	1.00%
Target Allocations Range, Minimum	0.00%
Target Allocations Range, Maximum	10.00%
Non-U.S. Pension Plan | Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	34.00%	33.00%
Target Allocations Range, Minimum	28.00%
Target Allocations Range, Maximum	38.00%
Non-U.S. Pension Plan | Non-Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	37.00%	34.00%
Target Allocations Range, Minimum	27.00%
Target Allocations Range, Maximum	37.00%
Non-U.S. Pension Plan | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	29.00%	33.00%
Target Allocations Range, Minimum	25.00%
Target Allocations Range, Maximum	45.00%
Non-U.S. Pension Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	0.00%	0.00%
Target Allocations Range, Minimum	0.00%
Target Allocations Range, Maximum	5.00%