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Carrying Amounts and Estimated Fair Values of Other Financial Instruments (Parenthetical) (Details) | Dec. 31, 2021 | Dec. 31, 2020
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2.45% Senior notes due August 1, 2022 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.45% | 2.45%
2.45% Senior notes due August 1, 2022 | Fair Value, Inputs, Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.45% | 2.45%
2.875% Senior notes due October 1, 2022 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.875% | 2.875%
2.875% Senior notes due October 1, 2022 | Fair Value, Inputs, Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.875% | 2.875%
3.15% Senior notes due August 1, 2027 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 3.15% | 3.15%
3.15% Senior notes due August 1, 2027 | Fair Value, Inputs, Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 3.15% | 3.15%
2.3% Senior notes due December 15, 2031 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.30% | 2.30%
2.3% Senior notes due December 15, 2031 | Fair Value, Inputs, Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 2.30% | 2.30%
3.95% Senior notes due August 1, 2047 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 3.95% | 3.95%
3.95% Senior notes due August 1, 2047 | Fair Value, Inputs, Level 2 |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Interest rate of debt | 3.95% | 3.95%

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