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Debt and Other Obligations Debt and Other Obligations - Secured Notes of SPEs (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 20, 2017	Sep. 30, 2013	Jan. 17, 2012	Nov. 14, 2001
Secured notes
Secured notes	$ 40		$ 360
Interest rate				7.10%
Fair value of liabilities assumed		$ 74
Special purpose entity
Secured notes
Secured notes					$ 272
Interest rate					5.572%

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- Definition

[Line Items] for Secured notes of SPEs [Table]

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No definition available.

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For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs.

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Face (par) amount of debt instrument at time of issuance.

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

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