Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total Revenues	$ 1,793	$ 1,465	$ 3,503	$ 3,325
Equipment
Disaggregation of Revenue [Line Items]
Total Revenues	429	310	810	635
Supplies, paper and other sales
Disaggregation of Revenue [Line Items]
Total Revenues	241	150	462	390
Maintenance agreements
Disaggregation of Revenue [Line Items]
Total Revenues	448	366	883	895
Service arrangements
Disaggregation of Revenue [Line Items]
Total Revenues	508	460	997	1,026
Rental and other
Disaggregation of Revenue [Line Items]
Total Revenues	111	123	240	264
Financing
Disaggregation of Revenue [Line Items]
Total Revenues	56	56	111	115
Sales
Disaggregation of Revenue [Line Items]
Total Revenues	670	460	1,272	1,025
Sales | Direct equipment lease
Disaggregation of Revenue [Line Items]
Total Revenues	189	111	336	237
Sales | Distributors & resellers
Disaggregation of Revenue [Line Items]
Total Revenues	289	136	543	359
Sales | Customer direct
Disaggregation of Revenue [Line Items]
Total Revenues	192	213	393	429
United States
Disaggregation of Revenue [Line Items]
Total Revenues	1,015	925	1,989	2,039
Europe
Disaggregation of Revenue [Line Items]
Total Revenues	514	356	1,013	837
Canada
Disaggregation of Revenue [Line Items]
Total Revenues	104	76	197	184
Other
Disaggregation of Revenue [Line Items]
Total Revenues	$ 160	$ 108	$ 304	$ 265