Segment Information - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment line	Jun. 30, 2023 USD ($)
Revenue from External Customer [Line Items]
Number of primary lines of business | line			1
Number of reportable segments | segment			3
Revenues	$ 2,159	$ 2,019	$ 4,286	$ 4,017
UNITED STATES
Revenue from External Customer [Line Items]
Revenues	$ 825	$ 753	$ 1,600	$ 1,500