Lease Commitments - Assets and Liabilities of Lessee (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets
Operating lease assets	$ 650	$ 699
Finance lease assets	26	43
Total lease assets	$ 676	$ 742
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other non-current assets	Other non-current assets
Current lease liabilities
Operating	$ 159	$ 163
Finance	$ 23	$ 23
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Non-current lease liabilities
Operating	$ 641	$ 693
Finance	$ 10	$ 28
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities	Other non-current liabilities
Total lease liabilities	$ 833	$ 907