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Schedule II - Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts and Reserves
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
(In millions)
COLUMN ACOLUMN BCOLUMN CCOLUMN DCOLUMN ECOLUMN F
  Additions  
DescriptionBalance at
beginning of
period		 Charged to costs and expenseCharged to
other  accounts		AcquisitionsDeductions
– write-offs		Balance at
end of period
For the year ended December 31, 2020
Allowances deducted from assets to which they apply:
Trade accounts receivable$62 $6 $— $— $(9)$59 
Deferred tax assets243 (11)1 — (28)205 
For the year ended December 31, 2019
Allowances deducted from assets to which they apply:
Trade accounts receivable65 4 — 1 (8)62 
Deferred tax assets282 (33)5 — (11)243 
For the year ended December 31, 2018
Allowances deducted from assets to which they apply:
Trade accounts receivable71 (6)(4)7 (3)65 
Deferred tax assets228 (1)(7)76 (14)282