Employee Retirement and Pension Benefits - Percentage of Plan Assets (Details)	Dec. 31, 2019	Dec. 31, 2018
U.S.
Defined Benefit Plan Disclosure
Percentage of plan asset	100.00%	100.00%
U.S. | Equity securities
Defined Benefit Plan Disclosure
Percentage of plan asset	7.90%	7.40%
U.S. | Debt securities
Defined Benefit Plan Disclosure
Percentage of plan asset	36.10%	38.00%
U.S. | Other
Defined Benefit Plan Disclosure
Percentage of plan asset	56.00%	54.60%
Non U.S
Defined Benefit Plan Disclosure
Percentage of plan asset	100.00%	100.00%
Non U.S | Equity securities
Defined Benefit Plan Disclosure
Percentage of plan asset	45.80%	48.40%
Non U.S | Debt securities
Defined Benefit Plan Disclosure
Percentage of plan asset	20.70%	20.80%
Non U.S | Other
Defined Benefit Plan Disclosure
Percentage of plan asset	33.50%	30.80%