Retirement Benefit Plans (Actual Allocation Percentage and Target Allocation Percentage for the U.S. Pension Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. Plan | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	45.90%	43.80%
U.S. Plan | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	20.40%	19.30%
U.S. Plan | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	33.20%	36.40%
U.S. Plan | Money market
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	0.50%	0.50%
U.S. Plan | Minimum | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.36
U.S. Plan | Minimum | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.16
U.S. Plan | Minimum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.3
U.S. Plan | Minimum | Money market
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0
U.S. Plan | Maximum | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.54
U.S. Plan | Maximum | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.24
U.S. Plan | Maximum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.4
U.S. Plan | Maximum | Money market
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.1
Non-U.S. Plan | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	37.50%	40.60%
Non-U.S. Plan | Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	30.20%	29.50%
Non-U.S. Plan | Non-Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	32.30%	29.90%
Non-U.S. Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	0.00%	0.00%
Non-U.S. Plan | Minimum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.3
Non-U.S. Plan | Minimum | Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.25
Non-U.S. Plan | Minimum | Non-Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.25
Non-U.S. Plan | Minimum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0
Non-U.S. Plan | Maximum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.5
Non-U.S. Plan | Maximum | Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.35
Non-U.S. Plan | Maximum | Non-Canadian equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.35
Non-U.S. Plan | Maximum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Target allocations range	0.05