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SEC Schedule, Article 12-09, Valuation and Qualifying Accounts (Tables)
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts
Schedule II—Valuation and Qualifying Accounts for the years ended December 31, 2023, 2022 and 2021:
(in millions) Additions  
DescriptionBalance at
Beginning of
Period		Charged to
Costs and
Expenses		Charged to
Other
Accounts		DeductionsBalance at
End of
Period
Allowance for doubtful accounts (a)
Year ended December 31, 2023
$12 $8 $— $(2)$18 
Year ended December 31, 2022
11 2 — (1)12 
Year ended December 31, 2021
13 2 — (4)11 
Deferred tax asset valuation allowance
Year ended December 31, 2023
$20 $5 $— $— $25 
Year ended December 31, 2022
20 — — — 20 
Year ended December 31, 2021
21 (1)— — 20 
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(a)The deduction column represents uncollectible accounts written off, net of recoveries from Trade Receivables, in the Consolidated Balance Sheets.