Fair Value Measurements - Schedule of Assets and Liabilities Measured and Recorded at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets
Derivatives	$ 47	$ 9
Liabilities
Derivatives	113	196
Mutual funds
Assets
Fair value of investments measured on recurring basis	1,131	1,072
U.S. Government securities
Assets
Fair value of investments measured on recurring basis	80	116
Other securities
Assets
Fair value of investments measured on recurring basis	711	645
Level 1
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Level 1 | Mutual funds
Assets
Fair value of investments measured on recurring basis	1,131	1,072
Level 1 | U.S. Government securities
Assets
Fair value of investments measured on recurring basis	0	0
Level 1 | Other securities
Assets
Fair value of investments measured on recurring basis	372	342
Level 2
Assets
Derivatives	47	9
Liabilities
Derivatives	113	196
Level 2 | Mutual funds
Assets
Fair value of investments measured on recurring basis	0	0
Level 2 | U.S. Government securities
Assets
Fair value of investments measured on recurring basis	80	116
Level 2 | Other securities
Assets
Fair value of investments measured on recurring basis	339	303
Level 3
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Level 3 | Mutual funds
Assets
Fair value of investments measured on recurring basis	0	0
Level 3 | U.S. Government securities
Assets
Fair value of investments measured on recurring basis	0	0
Level 3 | Other securities
Assets
Fair value of investments measured on recurring basis	$ 0	$ 0