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Debt - Senior Unsecured Notes (Details) - USD ($) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 09, 2020 | Jun. 24, 2020 | Nov. 21, 2019 | Jul. 22, 2019 | Jul. 16, 2018 | Jan. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 23, 2020 | Jul. 08, 2019 | Jul. 05, 2019 | Nov. 08, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  | $ 6,346,370,000 |  |  |  |  |  |
Senior unsecured notes |  |  |  |  |  |  |  | 5,697,586,000 | $ 5,647,993,000 |  |  |  |  |
Loss on debt extinguishments |  |  |  |  |  |  |  | 42,912,000 | $ 58,364,000 | $ 44,162,000 |  |  |  |
Unsecured Note 4.250 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 4.25% |  |
Unsecured Note 4.000% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  | $ 350,000,000 |  |  |  |  |  |  |  |  | $ 250,000,000 |  |
Interest rate (as a percent) |  |  | 4.00% |  |  |  |  |  |  |  |  | 4.00% |  |
Loss on debt extinguishments |  |  | $ 22,000,000 | $ 35,000,000 |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 2.63% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 2.63% |  |  |  |  |  |  |  |  |  |
Unsecured Note 3.750 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75%
Unsecured Note 5.375 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  | $ 700,000,000 |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 5.38% |  |  |  |  |  |  |  |  |
Loss on debt extinguishments |  |  |  |  | $ 44,000,000 |  |  |  |  |  |  |  |  |
Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  | $ 5,750,000,000 |  |  |  |  |  |
Senior unsecured notes |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Senior Unsecured Notes | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt extinguishments |  |  |  |  |  |  | $ 90,000,000 |  |  |  |  |  |  |
Senior Unsecured Notes | Senior Unsecured Notes Due 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  | $ 600,000,000 |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  | 2.88% |  |  |
Senior Unsecured Notes | Senior Unsecured Notes Due 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Senior Unsecured Notes Due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 650,000,000 |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 3.25% |
Senior Unsecured Notes | Senior Unsecured Notes Due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 650,000,000 |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 3.50% |
Senior Unsecured Notes | Unsecured Note 3.15 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount | $ 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.15% |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on debt extinguishments | $ 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Unsecured Note 4.250 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  | 4.25% |  |  |  |  |  |  |  |  |  | 4.25% |  |
Loss on debt extinguishments |  | $ 26,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Unsecured Note 4.000% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 4.00% | 4.00% |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Senior Unsecured Debt 2.63% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 2.63% |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Unsecured Note 5.375 Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 5.38% |  |  |  |  |  |  |  |  |
Senior Unsecured Notes | Senior Notes Due 2023 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 4.25% |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  |  | $ 112,000,000 |  |  |  |  |  |  |  |
Senior Unsecured Notes | Senior Unsecured Notes Due 2024 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 4.20% |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  |  | $ 201,000,000 |  |  |  |  |  |  |  |
Senior Unsecured Notes | 3.88% Senior Unsecured Notes Due 2024 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 3.88% |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  |  | $ 469,000,000 |  |  |  |  |  |  |  |

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