Business and Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) contract segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)
Statement [Line Items]
Number of segments | segment	3		3
Charges associated with doubtful accounts	$ 37	$ 43	$ 20
Net aggregate financing receivables	141	133
Prepaid expenses	620	771
Income taxes receivable	853	715
Payments for purchases of investments	331	172	523
Investments in partnership	$ 174	$ 71	$ 283
Contracts terminated | contract	3
Contract termination cost	$ 56
U.S. government assistance amount award				$ 568
Government Assistance, Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration]	Operating Income (Loss)	Operating Income (Loss)	Operating Income (Loss)
Government Assistance, Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net	Property, plant and equipment, net
Operating Expenses
Statement [Line Items]
U.S. government assistance, amount recognized	$ 43	$ 51	$ 49
Capital Expenditures
Statement [Line Items]
U.S. government assistance, amount	$ 198	$ 136	$ 87
Minimum
Statement [Line Items]
U.S. government assistance, transaction duration				1 year
Maximum
Statement [Line Items]
U.S. government assistance, transaction duration				4 years