Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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 210.5-02.3(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Name:	us-gaap_AccountsReceivableRelatedPartiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Related Party Transactions - Related Party Transactions (Parenthetical) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($) lease_agreement	Mar. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Related party management fee		$ 5
Affiliated Entity
Related Party Transaction [Line Items]
Current related party receivables	$ 49			$ 55
Affiliated Entity \| Tax Matters Agreement
Related Party Transaction [Line Items]
Current related party receivables	$ 12
Affiliated Entity \| Loan Transaction With Related Party
Related Party Transaction [Line Items]
Related party transaction, rate		4.28%	3.25%
Affiliated Entity \| Lease Agreements
Related Party Transaction [Line Items]
Number of lease agreements \| lease_agreement	2