Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		$ 275	$ 278
Operating cash flows from finance leases		1	1
Financing cash flows from finance leases		2	2
Right-of-use assets obtained in exchange for new lease liabilities
Operating leases	[1]	153	23
Finance leases	[1]	$ 3	$ 3

[1] This supplemental non-cash disclosure for ROU assets obtained in exchange for lease liabilities includes an increase in lease liabilities associated with obtaining new ROU assets of $171 million and $123 million for the years to date ended June 30, 2023 and 2022, respectively, as well as adjustments to lease liabilities or ROU assets due to modification or other reassessment events, which resulted in a $15 million and $97 million decrease in lease liabilities for the years to date ended June 30, 2023 and 2022, respectively.