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Retirement Plans and Post Retirement Benefits Pension Costs, Assumptions Used in Net Periodic Costs and Expected Contributions and Payments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment |  | $ (1) |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | $ 3 | 3 | $ 5
Interest cost | 12 | 11 | 13
Expected return on plan assets | (14) | (14) | (13)
Amortization of prior service cost | 1 | 1 | 1
Amortization of net actuarial loss | 5 | 6 | 6
Net periodic pension cost before settlement | 6 | 7 | 11
Loss due to settlement | 0 | 0 | 3
Net periodic pension cost | 6 | 7 | 14
Net periodic pension cost included in cost of sales | 2 | 2 | 4
Net periodic pension cost included in selling, general, and administrative expenses | 1 | 1 | 1
Net periodic pension cost included in other non-operating items | $ 3 | $ 4 | $ 9
Defined Benefit, Canadian Plans [Member] |  |  |
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.80% | 3.30% | 3.70%
Expected return on plan assets | 3.40% | 4.10% | 3.80%
Rate of compensation increase | 3.50% | 3.50% | 3.50%
Defined Benefit, SERP [Member] |  |  |
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate |  | 4.00% | 2.70%
Rate of compensation increase |  |  | 3.00%
Defined Benefit, US Plans [Member] |  |  |
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 4.20% | 3.50% | 4.00%
Expected return on plan assets | 5.80% | 5.80% | 5.80%

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit 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 (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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