Annual report pursuant to Section 13 and 15(d)

REVENUE RECOGNITION LONG-TERM CONTRACTS AND DEFERRED AND UNBILLED REVENUE REVENUE RECOGNITION LONG-TERM CONTRAACTS AND DEFERRED AND UNBILLED REVENUE (Tables)

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REVENUE RECOGNITION LONG-TERM CONTRACTS AND DEFERRED AND UNBILLED REVENUE REVENUE RECOGNITION LONG-TERM CONTRAACTS AND DEFERRED AND UNBILLED REVENUE (Tables)
12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Asset and Liability
The following is a summary of our unbilled and deferred revenue and related activity:
 
 
Years ended December 31,
In millions
 
2019
 
2018
Unbilled revenue
 
$
68

 
$
64

Deferred revenue, primarily extended warranty
 
1,354

 
1,156