Pension Benefits (Details) - UNITED STATES - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 3
Interest cost	11	8	21	16
Expected return on plan assets	(13)	(11)	(25)	(23)
Amortization of net loss	(1)	2	(1)	5
Amortization of prior service cost	1	2	1	3
Net periodic benefit cost	$ (1)	$ 2	$ (2)	$ 4