Leases (Lease and Other Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Assets and Liabilities, Lessee
Operating Lease, Right-of-Use Asset	$ 605		$ 605		$ 604
Operating Lease, Liability, Current	178		178		181
Operating Lease, Liability, Noncurrent	$ 717		$ 717		$ 751
Balance sheet location of operating lease right-of-use assets	Other noncurrent assets		Other noncurrent assets		Other noncurrent assets
Balance sheet location of current operating lease liabilities	Other current liabilities		Other current liabilities		Other current liabilities
Balance sheet location of noncurrent operating lease liabilities	Other noncurrent liabilities		Other noncurrent liabilities		Other noncurrent liabilities
Lease, Cost and Other Information [Abstract]
Operating Lease, Cost	$ 32	$ 33	$ 57	$ 65
Short-term Lease, Cost	16	11	29	24
Sublease Income	(1)	(1)	(2)	(2)
Lease, Cost	47	43	84	87
Operating Lease, Payments	54	53	105	105
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 18	$ 29	$ 40	$ 37