Employee Benefit Plans - Assumptions (Details)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Nonqualified Plan [Member] \| Supplemental Employee Retirement Plans, Defined Benefit [Member]
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.45%	3.20%
Average wage increase	4.50%	4.50%
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.20%	4.30%	3.57%
Average wage increase	4.50%	4.50%	4.50%
United States \| Qualified Plan [Member] \| Pension Plan [Member]
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.65%	3.40%
Average wage increase	4.00%	4.00%
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.40%	4.35%	4.20%
Average wage increase	4.00%	4.00%	4.00%
Expected return on plan assets	6.30%	6.80%	6.80%
United States \| Qualified Plan [Member] \| Pension Plan [Member] \| Minimum [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate			3.65%
Expected return on plan assets			6.80%
United States \| Qualified Plan [Member] \| Pension Plan [Member] \| Maximum [Member]
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate			4.20%
Expected return on plan assets			7.25%
Foreign Plan [Member] \| Qualified Plan [Member] \| Pension Plan [Member]
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	0.79%	1.18%
Average wage increase	1.51%	1.80%
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	1.18%	1.83%	1.94%
Average wage increase	1.80%	2.10%	2.33%
Expected return on plan assets	3.69%	3.67%	4.66%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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- Definition

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

+ Details

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

+ References

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920

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- Definition

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

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- References

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