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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) | Dec. 31, 2021 | Nov. 15, 2021 | Dec. 31, 2020 | Sep. 01, 2020 | Jun. 22, 2020 | Aug. 26, 2019 | Aug. 28, 2018 | Dec. 19, 2016 | Nov. 21, 2012
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | $ 7,921,800,000 |  | $ 9,560,800,000 |  |  |  |  |  |
Less current portion | (799,200,000) |  | (499,400,000) |  |  |  |  |  |
Long-term debt | 7,122,600,000 |  | 9,061,400,000 |  |  |  |  |  |
Credit facility | Unsecured credit facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | 470,000,000.0 |  | 1,620,000,000 |  |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Less unamortized debt issuance costs | (48,500,000) |  | (59,700,000) |  |  |  |  |  |
Face amount of debt | 7,500,000,000 |  |  |  |  |  |  |  |
Senior notes | $500 2.800% senior notes due 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | 0 |  | 500,000,000.0 |  |  |  |  |  |
Face amount of debt |  | $ 500,000,000.0 |  |  |  |  |  | $ 500,000,000.0 |
Interest rate (as a percent) |  | 2.80% |  |  |  |  |  | 2.80% |
Senior notes | $500 2.800% senior notes due 2021 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 500,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 2.80% |  |  |  |  |  |  |  |
Senior notes | $500 3.125% senior notes due 2022 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 500,000,000.0 |  | 500,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  | $ 500,000,000.0
Interest rate (as a percent) |  |  |  |  |  |  |  |  | 3.125%
Senior notes | $500 3.125% senior notes due 2022 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 500,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.125% |  |  |  |  |  |  |  |
Senior notes | $300 0.450% senior notes due 2022 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 300,000,000.0 |  | 300,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  | $ 300,000,000.0 |  |  |  |  |
Interest rate (as a percent) |  |  |  | 0.45% |  |  |  |  |
Senior notes | $300 0.450% senior notes due 2022 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 300,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 0.45% |  |  |  |  |  |  |  |
Senior notes | $700 3.650% senior notes due 2023 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 700,000,000.0 |  | 700,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  | $ 700,000,000.0 |  |
Interest rate (as a percent) |  |  |  |  |  |  | 3.65% |  |
Senior notes | $700 3.650% senior notes due 2023 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 700,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.65% |  |  |  |  |  |  |  |
Senior notes | $500 2.350% senior notes due 2024 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 500,000,000.0 |  | 500,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  |  | $ 500,000,000.0 |  |  |
Interest rate (as a percent) |  |  |  |  |  | 2.35% |  |  |
Senior notes | $500 2.350% senior notes due 2024 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 500,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 2.35% |  |  |  |  |  |  |  |
Senior notes | $300 3.850% senior notes due 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 300,000,000.0 |  | 300,000,000.0 |  |  |  |  |  |
Senior notes | $300 3.850% senior notes due 2025 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 300,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.85% |  |  |  |  |  |  |  |
Senior notes | $700 1.000% senior notes due 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 700,000,000.0 |  | 700,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  | $ 700,000,000.0 |  |  |  |  |
Interest rate (as a percent) |  |  |  | 1.00% |  |  |  |  |
Senior notes | $700 1.000% senior notes due 2025 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 700,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 1.00% |  |  |  |  |  |  |  |
Senior notes | $700 3.800% senior notes due 2026 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 700,000,000.0 |  | 700,000,000.0 |  |  |  |  |  |
Senior notes | $700 3.800% senior notes due 2026 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 700,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.80% |  |  |  |  |  |  |  |
Senior notes | $700 1.400% senior notes due 2027 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 700,000,000.0 |  | 700,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  | $ 700,000,000.0 |  |  |  |  |
Interest rate (as a percent) |  |  |  | 1.40% |  |  |  |  |
Senior notes | $700 1.400% senior notes due 2027 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 700,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 1.40% |  |  |  |  |  |  |  |
Senior notes | $800 4.200% senior notes due 2028 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 800,000,000.0 |  | 800,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  | $ 800,000,000.0 |  |
Interest rate (as a percent) |  |  |  |  |  |  | 4.20% |  |
Senior notes | $800 4.200% senior notes due 2028 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 800,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 4.20% |  |  |  |  |  |  |  |
Senior notes | $700 2.950% senior notes due 2029 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 700,000,000.0 |  | 700,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  |  | $ 700,000,000.0 |  |  |
Interest rate (as a percent) |  |  |  |  |  | 2.95% |  |  |
Senior notes | $700 2.950% senior notes due 2029 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 700,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 2.95% |  |  |  |  |  |  |  |
Senior notes | $600 2.000% senior notes due 2030 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 600,000,000.0 |  | 600,000,000.0 |  |  |  |  |  |
Face amount of debt |  |  |  |  | $ 600,000,000.0 |  |  |  |
Interest rate (as a percent) |  |  |  |  | 2.00% |  |  |  |
Senior notes | $600 2.000% senior notes due 2030 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 600,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 2.00% |  |  |  |  |  |  |  |
Senior notes | $1,000 1.750% senior notes due 2031 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 1,000,000,000 |  | 1,000,000,000 |  |  |  |  |  |
Face amount of debt |  |  |  | $ 1,000,000,000 |  |  |  |  |
Interest rate (as a percent) |  |  |  | 1.75% |  |  |  |  |
Senior notes | $1,000 1.750% senior notes due 2031 | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face amount of debt | $ 1,000,000,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) | 1.75% |  |  |  |  |  |  |  |
Senior notes | Other |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt | $ 300,000 |  | $ 500,000 |  |  |  |  |  |

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