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Fair Value Measurements (Estimated Fair Values of Long-Term Debt) (Details) - 3 months ended Mar. 31, 2022 € in Millions, $ in Millions | EUR (€) | USD ($)
--- | --- | ---
$750.0 million Fixed Rate Notes Due September 2022, stated rate of 3.00% [Member] |  |
Debt Instrument, Face Amount |  | $ 750.0
Debt Instrument, Maturity Date | Sep. 15, 2022 |
€15.0 million fixed rate notes due May 2023 [Member] |  |
Debt Instrument, Face Amount | € | € 15.0 |
Debt Instrument, Maturity Date | May 01, 2023 |
$750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member] |  |
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Mar. 15, 2025 |
$500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain] |  |
Debt Instrument, Face Amount |  | 500.0
Debt Instrument, Maturity Date | Jun. 15, 2028 |
$750.0 million Fixed Rate Notes Due September 2043, stated rate of 5.30% [Member] |  |
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Sep. 15, 2043 |
$700.0 Million Fixed Rate Notes Due June 2048, stated rate of 4.15% [Member] [Domain] [Domain] |  |
Debt Instrument, Face Amount |  | 700.0
Debt Instrument, Maturity Date | Jun. 15, 2048 |
$750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65% |  |
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Mar. 15, 2032 |
Fair Value, Inputs, Level 2 [Member] | $750.0 million Fixed Rate Notes Due September 2022, stated rate of 3.00% [Member] |  |
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Sep. 15, 2022 |
Fair Value, Inputs, Level 2 [Member] | €15.0 million fixed rate notes due May 2023 [Member] |  |
Debt Instrument, Fair Value Disclosure |  | 17.4
Debt Instrument, Face Amount |  | 15.0
Debt Instrument, Maturity Date | May 31, 2023 |
Fair Value, Inputs, Level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2025, stated rate of 3.00% [Member] |  |
Debt Instrument, Fair Value Disclosure |  | 755.1
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Mar. 15, 2025 |
Fair Value, Inputs, Level 2 [Member] | $500.0 Million Fixed Rate Notes Due June 2028, stated rate of 3.75% [Member] [Domain] |  |
Debt Instrument, Fair Value Disclosure |  | 511.9
Debt Instrument, Face Amount |  | 500.0
Debt Instrument, Maturity Date | Jun. 15, 2028 |
Fair Value, Inputs, Level 2 [Member] | $750.0 million Fixed Rate Notes Due September 2043, stated rate of 5.30% [Member] |  |
Debt Instrument, Fair Value Disclosure |  | 914.4
Debt Instrument, Face Amount |  | 750.0
Debt Instrument, Maturity Date | Sep. 15, 2043 |
Fair Value, Inputs, Level 2 [Member] | $700.0 Million Fixed Rate Notes Due June 2048, stated rate of 4.15% [Member] [Domain] [Domain] |  |
Debt Instrument, Fair Value Disclosure |  | 738.2
Debt Instrument, Face Amount |  | 700.0
Debt Instrument, Maturity Date | Jun. 15, 2048 |
Fair Value, Inputs, Level 2 [Member] | $750.0 Million Fixed Rate Notes Due March 2032, Interest Equal To 2.65% |  |
Debt Instrument, Fair Value Disclosure |  | $ 718.7

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