Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,217	$ 1,189	$ 2,365	$ 2,291
North America
Disaggregation of Revenue [Line Items]
Net sales	783	713	1,479	1,348
Europe
Disaggregation of Revenue [Line Items]
Net sales	325	362	665	717
APAC & Emerging Markets
Disaggregation of Revenue [Line Items]
Net sales	109	114	221	226
Operating Segments | North America
Disaggregation of Revenue [Line Items]
Net sales	783	713	1,479	1,348
Operating Segments | Europe
Disaggregation of Revenue [Line Items]
Net sales	327	366	671	727
Operating Segments | APAC & Emerging Markets
Disaggregation of Revenue [Line Items]
Net sales	109	114	221	226
Operating Segments | Supply Chain Services
Disaggregation of Revenue [Line Items]
Net sales	1,029	1,034	2,012	1,998
Operating Segments | Supply Chain Services | North America
Disaggregation of Revenue [Line Items]
Net sales	599	562	1,136	1,065
Operating Segments | Supply Chain Services | Europe
Disaggregation of Revenue [Line Items]
Net sales	323	360	660	712
Operating Segments | Supply Chain Services | APAC & Emerging Markets
Disaggregation of Revenue [Line Items]
Net sales	107	112	216	221
Operating Segments | Prescription Management
Disaggregation of Revenue [Line Items]
Net sales	163	131	303	243
Operating Segments | Prescription Management | North America
Disaggregation of Revenue [Line Items]
Net sales	163	131	303	243
Operating Segments | Prescription Management | Europe
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Operating Segments | Prescription Management | APAC & Emerging Markets
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Operating Segments | Software Services
Disaggregation of Revenue [Line Items]
Net sales	25	24	50	50
Operating Segments | Software Services | North America
Disaggregation of Revenue [Line Items]
Net sales	21	20	40	40
Operating Segments | Software Services | Europe
Disaggregation of Revenue [Line Items]
Net sales	2	2	5	5
Operating Segments | Software Services | APAC & Emerging Markets
Disaggregation of Revenue [Line Items]
Net sales	$ 2	$ 2	$ 5	$ 5