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v3.22.2.2

Debt - Senior Unsecured Notes (Details) - USD ($) $ in Millions |  |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 04, 2021 | Apr. 12, 2021 | Apr. 30, 2021 | Oct. 29, 2022 | Jan. 29, 2022 | Jun. 22, 2018
Debt Instrument [Line Items] |  |  |  |  |  |
Debt outstanding |  |  |  | $ 4,511.6 | $ 4,548.0 |
Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt outstanding |  |  |  | $ 2,000.0 |  |
Redemption price percentage |  | 101.00% | 101.00% |  |  |
Senior Notes | 1.650% 2026 Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  | $ 500.0 |  |  |  |
Stated interest rate |  | 1.65% |  | 1.65% |  |
Effective interest rate |  | 1.839% |  |  |  |
Senior Notes | 2.450% 2028 Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  | $ 750.0 |  |  |  |
Stated interest rate |  | 2.45% |  | 2.45% |  |
Effective interest rate |  | 2.554% |  |  |  |
Senior Notes | 2.950% 2031 Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  | $ 750.0 |  |  |  |
Stated interest rate |  | 2.95% |  | 2.95% |  |
Effective interest rate |  | 3.043% |  |  |  |
Senior Notes | MTG/MTI Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt outstanding |  |  |  | $ 1,000.0 |  |
Senior Notes | MTG Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt outstanding |  |  | $ 1,000.0 |  |  |
Senior Notes | MTG Senior Notes Due 2023 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  | $ 500.0 |  |  | $ 500.0
Stated interest rate |  |  | 4.20% |  |  | 4.20%
Principal amount exchanged | $ 433.9 |  |  |  |  |
Effective interest rate |  |  | 4.36% |  |  |
Senior Notes | MTG Senior Notes Due 2028 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  | $ 500.0 |  |  | $ 500.0
Stated interest rate |  |  | 4.875% |  |  | 4.875%
Principal amount exchanged | $ 479.5 |  |  |  |  |
Effective interest rate |  |  | 4.94% |  |  |
Senior Notes | MTI Senior Notes Due 2023 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  |  | 4.20% |  |  |
Effective interest rate |  |  | 4.502% |  |  |
Senior Notes | MTI Senior Notes Due 2028 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Stated interest rate |  |  | 4.875% |  |  |
Effective interest rate |  |  | 4.988% |  |  |

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