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Common Stock, Quarterly Dividends, Per Share

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

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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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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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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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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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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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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CAPITAL STOCK AND EQUITY - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Jan. 31, 2022 USD ($) $ / shares shares	Jan. 31, 2021 shares	Mar. 31, 2020 $ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Mar. 01, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, conversion ratio							1
Common stock, quarterly dividend (in USD per share) \| $ / shares			$ 0.025			$ 0.25
Dividends, common stock, cash \| $				$ (9)	$ (38)	$ (376)
Payments of capital distribution to parent \| $				$ 43
Shares authorized and available for grant (in shares)				11,000,000
Shares Issued in the period (in shares)				0	0	0
Shares exercised in the period (in shares)				0	0	0
Stock-settled and cash-settled compensation expensed \| $				$ 152	$ 40	$ 110
Stock-settled and cash-settled compensation capitalized \| $				18	7	28
Subsequent Event \| 2022 Performance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period in which stock options become exercisable	3 years
Paid-In Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, common stock, cash \| $				(9)	(38)	(376)
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-settled and cash-settled compensation expensed \| $				91	39	104
Stock-settled and cash-settled compensation capitalized \| $				$ 15	$ 6	$ 24
Awards granted during period (in shares)				1,506,000	1,352,000	1,479,000
Weighted average grant date fair value per share (in USD per share) \| $ / shares				$ 16.46	$ 24.60	$ 36.81
Total compensation cost related to non-vested awards not yet recognized \| $				$ 14
Restricted Stock \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period in which stock options become exercisable	3 years
Awards granted during period (in shares)	775,942
Weighted average grant date fair value per share (in USD per share) \| $ / shares	$ 29.46
Total compensation cost related to non-vested awards not yet recognized \| $	$ 23
Restricted Stock \| ALTM \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value per share (in USD per share) \| $ / shares	$ 63.63
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)				4,441,000	3,462,000	4,831,000
Total compensation cost related to non-vested awards not yet recognized \| $				$ 74
Phantom Units \| 2020 Performance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)		1,959,856
Phantom Units \| 2020 Performance Program \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)		0
Phantom Units \| 2020 Performance Program \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)		3,709,472
Phantom Units \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)	2,512,602
Total compensation cost related to non-vested awards not yet recognized \| $	$ 76
Phantom Units \| Subsequent Event \| 2022 Performance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)	1,093,034
Phantom Units \| Subsequent Event \| 2022 Performance Program \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)	0
Phantom Units \| Subsequent Event \| 2022 Performance Program \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized and available for grant (in shares)	2,186,068
Phantom Units \| ALTM \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted during period (in shares)	27,643
Total compensation cost related to non-vested awards not yet recognized \| $	$ 2
In or after 2016 \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period in which stock options become exercisable				3 years
Period in which stock options expires after grant date				10 years