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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on Recurring Basis and Subject to Fair Value Disclosure Requirements
The Company’s assets and liabilities measured at fair value on a recurring basis and subject to fair value disclosure requirements at December 31, 2021 and December 31, 2020 were as follows:
 Fair Value Measurements at Reporting Date Using
Quoted Prices 
in Active Markets
for Identical
Assets		Significant
Other
Observable
Inputs		Significant Unobservable Inputs
In millionsTotal(Level 1)(Level 2)(Level 3)
Assets
Money market funds at December 31, 2021$148 $148 $— $— 
Money market funds at December 31, 2020$16 $16 $— $— 
Liabilities
Interest rate swap at December 31, 2021$12 $— $12 $— 
Interest rate swap at December 31, 2020$27 $— $27 $—