The maximum debt to EBITDA ratio under the debt covenants.

No definition available.

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- Definition

Percentage of issue price of notes.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of premium paid on repurchase of notes.

+ References

No definition available.

+ Details

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- Definition

Principal amount of debt redeemed.

+ References

No definition available.

+ Details

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- Definition

The amount of premium paid for debt redemption.

+ References

No definition available.

+ Details

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- Definition

The minimum amount of disposition of a business line to trigger a reduction in each maximum level of consolidated debt to EBITDA.

+ References

No definition available.

+ Details

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- Definition

Percentage of issue price on debt.

+ References

No definition available.

+ Details

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- Definition

Percentage of principal amount of repurchased debt.

+ References

No definition available.

+ Details

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- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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.

+ Details

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Long-term debt and interest expense, net - Syndicated credit facility (Details) $ in Millions			1 Months Ended	3 Months Ended
	May 26, 2021 USD ($)	Jun. 25, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Long-term debt and interest expenses
Loss on debt extinguishment				$ (41)
Unamortized debt issuance cost expensed				4	$ 4
2023 Notes
Long-term debt and interest expenses
Aggregate principal amount			$ 1,000
Principal amount of redeemed	$ 350
Premium paid for debt redemption	$ 34
Loss on debt extinguishment				41
Aggregate principal amount repurchased		$ 150		$ 150
Interest rate (as a percent)		9.75%	9.75%
Notes issue price percentage			98.00%
Percentage of principal amount of repurchased debt		112.45%
Percentage of premium paid on repurchase of notes		12.45%
2027 Notes
Long-term debt and interest expenses
Aggregate principal amount		$ 150
Interest rate (as a percent)		7.54%
Issue Price (as a percent)		98.25%
Syndicated Credit Facility \| At the end of each fiscal quarter for the next nine months
Long-term debt and interest expenses
Maximum debt to EBITDA				7.50
Syndicated Credit Facility \| At the end of each fiscal quarter for the next 18 months
Long-term debt and interest expenses
Maximum debt to EBITDA				7.25
Syndicated Credit Facility \| At the end of each fiscal quarter for the next 24 months
Long-term debt and interest expenses
Maximum debt to EBITDA				6.25
Syndicated Credit Facility \| For each fiscal quarter thereafter
Long-term debt and interest expenses
Maximum debt to EBITDA				5.50
Syndicated Credit Facility \| Upon a disposition of a business line for greater than $500 million
Long-term debt and interest expenses
Maximum debt to EBITDA				0.25
Revolving Credit Facility \| Upon a disposition of a business line for greater than $500 million
Long-term debt and interest expenses
Minimum amount of disposition of business line to trigger a reduction in each maximum level of consolidated debt to EBITDA				$ 500
Revolving Credit Facility \| Maturing in December 2023
Long-term debt and interest expenses
Maximum borrowing capacity				500
Letter of credit
Long-term debt and interest expenses
Maximum borrowing capacity				200
Letter of credit outstanding				25		$ 31
Term Loan B \| Maturing in October 2024
Long-term debt and interest expenses
Aggregate principal amount				$ 2,000