Employee Benefits - Schedule of Fair Value of Defined Benefit Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	$ 1,447	$ 1,395
Total
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	1,024	907
Level 1
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	2	2
Level 2
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	1,022	905
Level 3
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0	0
Common collective trust funds measured at net asset value as a practical expedient
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	423	488
Cash and short-term investments \| Total
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	2	2
Cash and short-term investments \| Level 1
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	2	2
Cash and short-term investments \| Level 2
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0	0
Cash and short-term investments \| Level 3
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0	0
Long duration strategy \| Total
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	956	905
Long duration strategy \| Level 1
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0	0
Long duration strategy \| Level 2
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	956	905
Long duration strategy \| Level 3
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0	$ 0
Asset-backed securities \| Total
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	66
Asset-backed securities \| Level 1
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	0
Asset-backed securities \| Level 2
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	66
Asset-backed securities \| Level 3
Fair value of defined benefit plans assets by asset class
Fair value of plan assets	$ 0