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Contractual interest rate for funds borrowed, under the debt agreement.

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The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

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Debt - Holding Company Debt (Details) - Holding Company - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 30, 2021	Jan. 31, 2021	Jan. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	May 31, 2019
Debt Instrument [Line Items]
(Gain) loss on extinguishment of debt		$ 3	$ (4)	$ 2
6.000% senior unsecured notes due 2020
Debt Instrument [Line Items]
Interest rate on debt instrument									6.00%	6.00%
5.875% senior unsecured notes due 2022
Debt Instrument [Line Items]
Debt face amount							$ 455
Interest rate on debt instrument		6.25%					6.25%
6.250% senior unsecured notes due 2022
Debt Instrument [Line Items]
Debt face amount					$ 1,350	$ 750
Interest rate on debt instrument					5.875%	6.25%
6.750% senior unsecured notes due 2024
Debt Instrument [Line Items]
Interest rate on debt instrument		6.75%
6.750% senior unsecured notes due 2024 \| Subsequent event
Debt Instrument [Line Items]
Interest rate on debt instrument	6.75%
Repayment of senior notes	$ 500
4.750% senior unsecured note due 2024
Debt Instrument [Line Items]
Debt face amount					$ 455			$ 500
Interest rate on debt instrument		4.75%			4.75%			4.75%
6.375% senior unsecured notes due 2025
Debt Instrument [Line Items]
Interest rate on debt instrument		6.375%
6.250% senior unsecured notes due 2026
Debt Instrument [Line Items]
Debt face amount									$ 1,250	$ 1,250
Interest rate on debt instrument		6.25%							6.25%	6.25%
5.250% senior unsecured note due 2027
Debt Instrument [Line Items]
Debt face amount				$ 750	$ 250		$ 600
Interest rate on debt instrument		5.25%		5.25%	5.25%		5.25%
4.375% senior unsecured notes due 2029
Debt Instrument [Line Items]
Debt face amount						$ 750
Interest rate on debt instrument		4.375%				4.375%