Supplemental Financial Information - Supplemental Disclosure of Cash-flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Supplemental disclosure of cash flow information
Cash paid for the amount used to measure the operating lease liabilities	$ 134	$ 134
Operating lease assets obtained in exchange for lease obligations	290	461
Net increase to operating lease right-of-use assets resulting from remeasurements of lease obligations	118	17
Non-cash investing and financing activities
Increase in property and equipment-related accounts payable	$ 15	$ 9