Fair Value Measurements - Nonrecurring Basis (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets and Liabilities Measured on Recurring or Nonrecurring Basis
Goodwill impairment expense		$ 0	$ 271	$ 0
Fair value on a nonrecurring basis
Assets and Liabilities Measured on Recurring or Nonrecurring Basis
Long-lived asset impairment charges		0	500
Goodwill impairment expense		$ 300	$ 300
Fair value on a nonrecurring basis | Minimum
Assets and Liabilities Measured on Recurring or Nonrecurring Basis
Estimate fair value, discount rates (as a percent)			11.00%
Fair value on a nonrecurring basis | Maximum
Assets and Liabilities Measured on Recurring or Nonrecurring Basis
Estimate fair value, discount rates (as a percent)			12.00%
Fair value on a nonrecurring basis | Disposal group, Held-for-sale, Not discontinued operations
Assets and Liabilities Measured on Recurring or Nonrecurring Basis
Long-lived asset impairment charges	$ (109)
Other current held for sale liabilities			$ 50
Disposal group, not discontinued operation, gain (loss) on disposal			$ (800)