Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total Revenues	$ 1,758	$ 1,767	$ 5,261	$ 5,092
Equipment
Disaggregation of Revenue [Line Items]
Total Revenues	387	419	1,197	1,054
Supplies, paper and other sales
Disaggregation of Revenue [Line Items]
Total Revenues	270	232	732	622
Maintenance agreements
Disaggregation of Revenue [Line Items]
Total Revenues	447	443	1,330	1,338
Service arrangements
Disaggregation of Revenue [Line Items]
Total Revenues	493	486	1,490	1,512
Rental and other
Disaggregation of Revenue [Line Items]
Total Revenues	106	132	346	396
Financing
Disaggregation of Revenue [Line Items]
Total Revenues	55	55	166	170
Sales
Disaggregation of Revenue [Line Items]
Total Revenues	657	651	1,929	1,676
Sales | Direct equipment lease
Disaggregation of Revenue [Line Items]
Total Revenues	170	151	506	388
Sales | Distributors & resellers
Disaggregation of Revenue [Line Items]
Total Revenues	283	245	826	604
Sales | Customer direct
Disaggregation of Revenue [Line Items]
Total Revenues	204	255	597	684
United States
Disaggregation of Revenue [Line Items]
Total Revenues	1,012	1,062	3,001	3,101
Europe
Disaggregation of Revenue [Line Items]
Total Revenues	487	480	1,500	1,317
Canada
Disaggregation of Revenue [Line Items]
Total Revenues	97	94	294	278
Other
Disaggregation of Revenue [Line Items]
Total Revenues	$ 162	$ 131	$ 466	$ 396