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Compensation Plans - Additional Information (Details) shares in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Nov. 30, 2018 USD ($) plan shares | Nov. 30, 2017 USD ($) | Nov. 30, 2016 USD ($) | Mar. 31, 2017 | Mar. 31, 2015
Employee Benefits Disclosure [Line Items] |  |  |  |  |
Shares available for future grant (in shares) | shares | 13.5 |  |  |  |
Award vesting period | 3 years |  |  |  |
Unrecognized compensation cost | $ 65 |  |  |  |
Weighted-average period over which cost is expected to be recognized | 1 year 5 months |  |  |  |
Pension expense | $ 36 | $ 53 | $ 27 |  |
Defined contribution plans, total expense | $ 39 | $ 37 | $ 30 |  |
Multiemployer Defined Benefit Pension Plan |  |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |  |
Number of multiemployer plans | plan | 2 |  |  |  |
Multiemployer Defined Benefit Pension Plan | MNOPF |  |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |  |
Funded percentage |  |  |  | 84.00% | 90.00%
Employer contribution as a percentage of total contributions made by all plan participants | 5.00% | 5.00% | 5.00% |  |
Multiemployer Defined Benefit Pension Plan | MNRPF |  |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |  |
Employer contribution as a percentage of total contributions made by all plan participants | 5.00% | 5.00% | 5.00% |  |
Pension Plan |  |  |  |  |
Employee Benefits Disclosure [Line Items] |  |  |  |  |
Weighted-average discount rates | 3.40% | 2.70% |  |  |

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation 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=108410482&loc=d3e1928-114920 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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