Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost (Details) - Pension Plan	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
U.S.
Net periodic benefit cost
Discount rate	4.30%	3.60%	4.00%
Expected long-term rate of return	6.20%	6.20%	6.70%
International
Net periodic benefit cost
Discount rate	2.60%	2.50%	2.40%
Expected long-term rate of return	4.70%	4.90%	5.00%
Rate of compensation increase	2.30%	2.30%	2.40%