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Long-term Debt and Finance Leases - Senior Notes Redemption and Repurchases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Loss on debt extinguishment	$ 9	$ 51	$ 44
Recourse Debt | 6.25% Senior Notes due 2024
Debt Instrument [Line Items]
Cash Paid		$ 733
Interest rate, stated percentage	6.25%	6.25%
Loss on debt extinguishment		$ (29)
Write off of deferred debt issuance cost		$ 5

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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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.

+ References

No definition available.

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- Definition

Fair value amount of debt instrument that was repurchased.

+ References

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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