Leases (Lease and Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Lease, Right-of-Use Asset	$ 604	$ 628
Operating Lease, Liability, Current	181	133
Operating Lease, Liability, Noncurrent	751	864
Operating Lease, Cost	143	261	$ 438
Short-term and variable lease cost	35	45	50
Sublease Income	(3)	(4)	(9)
Lease, Cost	175	302	$ 479
Operating Lease, Payments	204	198
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 113	$ 334
Operating Lease, Weighted Average Remaining Lease Term	7 years	7 years
Operating Lease, Weighted Average Discount Rate, Percent	2.98%	2.69%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other noncurrent assets	Other noncurrent assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other noncurrent liabilities	Other noncurrent liabilities