Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Expense [Abstract]
Interest on borrowings(1)	$ 43	$ 46	$ 133	$ 139
Fees on financing agreements(1)	3	2	7	6
Interest on tax liabilities(2)	0	0	0	(4)
Interest expense	$ 46	$ 48	$ 140	$ 141

Amount of the cost of borrowed funds accounted for as interest expense.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration