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Fair Value of Assets and Liabilities (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Assets and liabilities recorded at fair value on a recurring basis as of December 31, 2021 and 2020 are set forth as follows:
  
 December 31, 2021 December 31, 2020
Fair Value Measurements UsingFair Value Measurements Using
In millionsDecember 31, 2021Quoted Prices
in Active
Markets
for Identical Assets
(Level 1)
Significant Other
Observable Inputs
(Level 2)
Significant
Unobservable  Inputs
(Level 3)
December 31, 2020Quoted Prices
in Active
Markets
for Identical Assets
(Level 1)
Significant Other
Observable Inputs
(Level 2)
Significant
Unobservable Inputs
(Level 3)
Assets:
Deposits held in money market mutual funds (1)
$17 $17 $ $ $22 $22 $— $— 
Foreign Investments (2)
    — — 
Foreign exchange contracts (2)
1  1  — — — — 
Interest rate cap agreements (3)
18 18 — — — — — 
Total$36 $17 $19 $ $24 $22 $$— 
Liabilities:
Foreign exchange contracts (4)
1  1  — — 
Total$1 $ $1 $ $$— $$— 

(1)    Included in Cash and cash equivalents in the Consolidated Balance Sheets.
(2)    Included in Other current assets in the Consolidated Balance Sheets.
(3)    Included in Other current assets and Other assets in the Consolidated Balance Sheets.
(4)    Included in Other current liabilities in the Consolidated Balance Sheets.