Debt Instrument, Quarterly Periodic Payment Percentage, Principal

No definition available.

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Period Type:	instant

- Definition

Line of Credit, Number of Credit Facilities

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
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
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Debt - Narrative (Details) $ in Millions		1 Months Ended	3 Months Ended
Debt - Narrative (Details) $ in Millions	Feb. 08, 2019 USD ($)	Oct. 31, 2017 USD ($)	Mar. 31, 2020 USD ($) facility
Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Commitment Fee			0.25%
Senior Secured Credit Facility - Original
Debt Instrument [Line Items]
Debt, aggregate principal amount	$ 469
Letter of Credit \| Three Committed Letter of Credit Facilities
Debt Instrument [Line Items]
Available capacity amount			$ 31
Number of term loan facilities \| facility			3
Amount available			$ 80
Undrawn letters of credit			49
Letter of Credit \| Ten Million Committed Facility
Debt Instrument [Line Items]
Maximum Borrowing Capacity			10
Letter of Credit \| Fifty Four Million Committed Letter Of Credit Facility
Debt Instrument [Line Items]
Maximum Borrowing Capacity			54
Letter of Credit \| Sixteen Million Committed Letter Of Credit Facility
Debt Instrument [Line Items]
Maximum Borrowing Capacity			16
Letter of Credit \| Two Unsecured Letter of Credit Facilities
Debt Instrument [Line Items]
Available capacity amount			$ 33
Number of term loan facilities \| facility			2
Amount available			$ 55
Undrawn letters of credit			22
Letter of Credit \| Forty Million Unsecured Letter Of Credit Facility
Debt Instrument [Line Items]
Amount available			40
Letter of Credit \| Fifteen Million Unsecured Letter Of Credit Facility
Debt Instrument [Line Items]
Amount available			$ 15
Minimum \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Commitment Fee			0.15%
Maximum \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Commitment Fee			0.30%
Term Loan A \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Debt, aggregate principal amount	$ 800
Quarterly principal payment, percentage	1.25%
Revolving Credit Facility \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 1,000
Line of credit maturity period	5 years
Available capacity amount			$ 674
Senior unsecured notes \| Six hundred million senior unsecured notes
Debt Instrument [Line Items]
Debt, aggregate principal amount		$ 600
Interest Rate Percentage		4.625%
Debt maturity period		10 years
LIBOR \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Interest rate margin			1.75%
LIBOR \| Senior Secured Credit Facility - Amended \| Minimum
Debt Instrument [Line Items]
Interest rate margin			1.25%
LIBOR \| Senior Secured Credit Facility - Amended \| Maximum
Debt Instrument [Line Items]
Interest rate margin			2.00%
Base Rate \| Senior Secured Credit Facility - Amended
Debt Instrument [Line Items]
Interest rate margin			0.75%
Base Rate \| Senior Secured Credit Facility - Amended \| Minimum
Debt Instrument [Line Items]
Interest rate margin			0.25%
Base Rate \| Senior Secured Credit Facility - Amended \| Maximum
Debt Instrument [Line Items]
Interest rate margin			1.00%