Share Based Compensation Arrangement By Share Based Payment Award Award Remaining Vesting Percentage

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award Allocation Percentage

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No definition available.

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- Definition

Sharebased compensation arrangement by sharebased payment award granted percentage

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number Of Share To Be Awarded, Initial

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number Of Share To Be Awarded, Ultimate

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Shares Paid out as Percentage of Target

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No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost capitalized for award under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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- Definition

Percentage of vesting of award under share-based payment arrangement.

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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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CAPITAL STOCK - Performance Program Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended					12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)						14,400,000
Compensation expense						$ 110	$ 157	$ 142
Stock-settled and cash-settled compensation capitalized						28	37	41
Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense						24	38	23
Stock-settled and cash-settled compensation capitalized						$ 3	$ 7	$ 4
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)						4,831,000	1,973,000
Phantom Units \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)	3,340,495
Performance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period						3 years
Performance Program \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting percentage						50.00%
Remaining shares vesting percentage						50.00%
Performance Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period	3 years
Performance Program \| Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)						345,000
Weighted average grant date fair value per share (in USD per share)						$ 32.75
2016 Performance Program \| Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)					871,369
Shares paid out as percentage of target							100.00%
Total awards, outstanding (in shares)						325,008
2017 Performance Program \| Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)				620,885
Shares paid out as percentage of target						54.00%
Total awards, outstanding (in shares)						455,499
2018 Performance Program \| Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total awards, outstanding (in shares)						796,829
2018 Performance Program \| Conditional Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares awarded of target			0.00%
2018 Performance Program \| Conditional Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares awarded of target			200.00%
2018 Performance Program \| Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)			931,049
2018 Performance Program \| Phantom Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)			0
2018 Performance Program \| Phantom Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)			1,593,658
2019 Performance Program \| Conditional Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total awards, outstanding (in shares)						1,523,360
2019 Performance Program \| Conditional Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares awarded of target			0.00%
2019 Performance Program \| Conditional Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares awarded of target			200.00%
2019 Performance Program \| Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)		1,679,832
2019 Performance Program \| Phantom Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)		0
2019 Performance Program \| Phantom Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)		3,046,720
2020 Performance Program \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares allocation percentage	50.00%
Shares vesting percentage	50.00%
2020 Performance Program \| Phantom Units \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial number of share to be awarded	1,658,781
2020 Performance Program \| Phantom Units \| Subsequent Event \| Monte Carlo Simulation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value per share (in USD per share)	$ 33.77
2020 Performance Program \| Phantom Units \| Subsequent Event \| Fair Market Value At Grant Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares allocation percentage	50.00%
Weighted average grant date fair value per share (in USD per share)	$ 25.69
2020 Performance Program \| Phantom Units \| Subsequent Event \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ultimate number of share to be awarded	0
2020 Performance Program \| Phantom Units \| Subsequent Event \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ultimate number of share to be awarded	3,317,562