Debt and Credit Facilities (Long-Term Debt Excluding Current Maturities) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Long-term debt excluding current maturities	$ 3,920.4	$ 4,318.1
Three Point Five Percent Senior notes Due Two Thousand Twenty Six [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.50%	3.50%
Long-term debt excluding current maturities	$ 0.0	$ 399.4
Three Point Seven Five Percent Senior Notes Due Two Thousand Twenty Eight [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.75%	3.75%
Long-term debt excluding current maturities	$ 548.2	$ 547.9
Three Point Eight Percent Senior Notes Due Two Thousand Twenty Nine [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.80%	3.80%
Long-term debt excluding current maturities	$ 747.5	$ 747.1
5.75% Senior notes due 2043 [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.75%	5.75%
Long-term debt excluding current maturities	$ 495.8	$ 495.7
Four Point Six Five Percent Senior Notes due Twenty Forty Four [Member]
Debt Instrument, Interest Rate, Stated Percentage	4.65%	4.65%
Long-term debt excluding current maturities	$ 296.8	$ 296.7
Four Point Three Percent Senior Notes Due Two Thousand Forty Eight [Member]
Debt Instrument, Interest Rate, Stated Percentage	4.30%	4.30%
Long-term debt excluding current maturities	$ 296.7	$ 296.7
Four Point Five Percent Senior Notes Due Two Thousand Forty Nine [Member]
Debt Instrument, Interest Rate, Stated Percentage	4.50%	4.50%
Long-term debt excluding current maturities	$ 346.4	$ 346.3
Five point Twenty-Five Percent Senior Notes Due Two Thousand Thirty Three
Debt Instrument, Interest Rate, Stated Percentage	5.25%	5.25%
Long-term debt excluding current maturities	$ 694.4	$ 694.0
Five point one zero percent senior notes due two thousand thirty four
Debt Instrument, Interest Rate, Stated Percentage	5.10%	5.10%
Long-term debt excluding current maturities	$ 494.6	$ 494.3