Accumulated Other Comprehensive Income - Summary of Changes in Balances for Each Component of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,859	$ 1,825	$ 1,868	$ 1,776	$ 1,767	$ 1,756
Gain arising during the period	9	25	(10)	32	5	9
Reclassification to earnings	(9)	(8)	(7)	(3)	(1)
Effect of deferred taxes	0	(4)	4	(7)	(1)	(2)
Ending balance	1,892	1,859	1,825	1,798	1,776	1,767
Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	52	39	52	20	17	10
Ending balance	52	52	39	42	20	17
Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(7)	(7)	(7)	(6)	(6)	(6)
Gain arising during the period				(2)
Ending balance	(7)	(7)	(7)	(8)	(6)	(6)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	21	22	23	11	12	12
Gain arising during the period	0
Reclassification to earnings	(1)	(1)	(1)		(1)
Effect of deferred taxes	0
Ending balance	20	21	22	11	11	12
Interest Rate Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	38	24	36	15	11	4
Gain arising during the period	9	25	(10)	34	5	9
Reclassification to earnings	(8)	(7)	(6)	(3)
Effect of deferred taxes	0	(4)	4	(7)	(1)	(2)
Ending balance	$ 39	$ 38	$ 24	$ 39	$ 15	$ 11