Debt (Schedule of debt instruments) (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-term debt	$ 2,971,000,000	$ 2,973,000,000
Total debt	$ 2,971,000,000	2,973,000,000
Senior Notes, 4.500%, face amount of $500, due March 1, 2026 [Member]
Debt Instrument [Line Items]
Stated interest rate	4.50%
Face amount	$ 500,000,000
Long-term debt	$ 0	500,000,000
3.450%, face amount of $500, due August 15, 2027
Debt Instrument [Line Items]
Stated interest rate	3.45%
Face amount	$ 500,000,000
Long-term debt	$ 499,000,000	498,000,000
3.900%, face amount of $500, due May 1, 2029
Debt Instrument [Line Items]
Stated interest rate	3.90%
Face amount	$ 500,000,000
Long-term debt	$ 498,000,000	498,000,000
2.050%, face amount of $500, due August 15, 2030
Debt Instrument [Line Items]
Stated interest rate	2.05%
Face amount	$ 500,000,000
Long-term debt	$ 497,000,000	497,000,000
5.500%, face amount of $500, due June 15, 2033
Debt Instrument [Line Items]
Stated interest rate	5.50%
Face amount	$ 500,000,000
Long-term debt	$ 492,000,000	491,000,000
5.125%, face amount of $500, due February 15, 2034
Debt Instrument [Line Items]
Stated interest rate	5.125%
Face amount	$ 500,000,000
Long-term debt	$ 491,000,000	489,000,000
5.200%, face amount of $500, due August 15, 2035
Debt Instrument [Line Items]
Stated interest rate	5.20%
Face amount	$ 500,000,000
Long-term debt	$ 494,000,000	$ 0