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Equity-Indexed Compensation Plans - Compensation Expense (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Other Consolidated Equity-Indexed Compensation Plan Information |  |  |
Equity-indexed compensation expense | $ 79 | $ 41 | $ 60
LTIP unit-settled vestings | 21 | 16 | 24
LTIP cash-settled vestings | 22 | $ 25 | $ 28
Equity-Indexed Compensation Plan Fair Value Amortization |  |  |
2019 | 30 |  |
2020 | 14 |  |
2021 | 4 |  |
2022 | 0 |  |
2023 | 0 |  |
Total | 48 |  |
Maximum |  |  |
Equity-Indexed Compensation Plan Fair Value Amortization |  |  |
2022 | 1 |  |
2023 | $ 1 |  |

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- Definition The amount of amortization expense expected to be recognized during the fifth twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the fourth twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the third twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the second twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition Other Consolidated Equity Compensation Information [Abstract] + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Vested In Period, Total Settlement Fair Value + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + 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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