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Commitments and Contingencies - Reconciliation of Changes (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Product warranty accrual, beginning balance $ 64 $ 49
Provisions 8 11
Changes in estimates 1 (1)
Currency/other (2) 0
Settlements (10) (10)
Product warranty accrual, ending balance $ 61 $ 49