Segment and Geographic Area Reporting - Revenue and Long-lived Assets by Geography (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 6,886	$ 7,107	$ 7,038
Long-lived assets	771	865
United States
Segment Reporting Information [Line Items]
Revenues	3,826	4,014	3,982
Long-lived assets	467	537
Europe
Segment Reporting Information [Line Items]
Revenues	1,951	1,935	2,023
Long-lived assets	241	249
Canada
Segment Reporting Information [Line Items]
Revenues	554	545	398
Long-lived assets	42	54
Other areas
Segment Reporting Information [Line Items]
Revenues	555	613	$ 635
Long-lived assets	$ 21	$ 25