Financial Instruments (Narrative) (Details) € in Millions, ¥ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 EUR (€)	Jun. 30, 2023 CNY (¥)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net investment losses on equity securities		$ 64,900,000	$ 118,900,000	$ 78,600,000	$ 544,300,000
Unfunded commitments to invest in venture capital funds		925,000,000		$ 925,000,000
Unfunded commitments to invest in venture capital funds, anticipated payment period				10 years
Percentage of nonperforming assets				99.00%
Accounts receivable derecognized		429,500,000		$ 429,500,000				$ 422,100,000
Average remaining maturity of foreign currency derivatives				12 months
Maximum remaining maturity of foreign currency derivatives				180 days
Foreign currency-denominated notes, designated as hedge		$ 5,570,000,000		$ 5,570,000,000				5,450,000,000
Variable rate		12.00%		12.00%		12.00%	12.00%
Losses expected to be reclassified in the next 12 months		$ 13,100,000		$ 13,100,000
Swap U.S. Dollars to Euro
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, notional amount		1,010,000,000.00		1,010,000,000.00
Swap Swiss Francs to U.S. Dollars
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability, notional amount		1,000,000,000		1,000,000,000
Sell Euro
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount | €						€ 2,080
Sell Chinese Yuan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount | ¥							¥ 1,800
Forward-starting interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount		1,000,000,000		1,000,000,000
Foreign Currency Denominated Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt		$ 6,950,000,000		$ 6,950,000,000				$ 6,830,000,000
5.0% Notes Due 2026 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, face amount	$ 750,000,000
Stated interest rate	5.00%
4.7% Notes Due 2033 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, face amount	$ 1,000,000,000
Stated interest rate	4.70%
4.875% Notes Due 2053 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, face amount	$ 1,250,000,000
Stated interest rate	4.875%
4.95% Notes Due 2063 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, face amount	$ 1,000,000,000
Stated interest rate	4.95%
Senior Notes Due 2026, 2033, 2053 And 2063 | Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from issuance of debt	$ 3,960,000,000