Borrowings - Senior Notes (Details) - USD ($) |
1 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|---|
Feb. 28, 2023 |
May 31, 2022 |
Feb. 28, 2023 |
Feb. 28, 2023 |
Feb. 28, 2023 |
Feb. 28, 2022 |
Feb. 28, 2021 |
|
| Schedule of Debt [Line Items] | |||||||
| Partial repayment | $ 2,159,700,000 | $ 1,365,300,000 | $ 2,721,300,000 | ||||
| Loss on extinguishment of debt | $ (24,200,000) | (29,400,000) | $ (12,800,000) | ||||
| Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Percentage of outstanding principal amount as redemption price | 100.00% | ||||||
| Basis points above adjusted treasury rate | 50.00% | ||||||
| 4.25% Senior Notes Due May 2023 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.25% | 4.25% | 4.25% | 4.25% | |||
| Principal | $ 1,050,000,000 | $ 1,050,000,000 | $ 1,050,000,000 | $ 1,050,000,000 | |||
| Unsecured debt | $ 0 | $ 679,400,000 | 0 | 0 | $ 0 | 1,048,600,000 | |
| Make-whole payment | $ 5,700,000 | ||||||
| Partial repayment | 690,600,000 | ||||||
| Loss on extinguishment of debt | $ (11,200,000) | ||||||
| 4.75% Senior Notes Due November 2024 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Principal | $ 400,000,000.0 | $ 400,000,000.0 | $ 400,000,000.0 | $ 400,000,000.0 | |||
| Unsecured debt | $ 398,900,000 | $ 398,900,000 | $ 398,900,000 | $ 398,900,000 | 398,200,000 | ||
| 4.75% Senior Notes Due December 2025 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Principal | $ 400,000,000.0 | $ 400,000,000.0 | $ 400,000,000.0 | $ 400,000,000.0 | |||
| Unsecured debt | $ 398,200,000 | $ 398,200,000 | $ 398,200,000 | $ 398,200,000 | 397,500,000 | ||
| 3.70% Senior Notes Due December 2026 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.70% | 3.70% | 3.70% | 3.70% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 597,700,000 | $ 597,700,000 | $ 597,700,000 | $ 597,700,000 | 597,100,000 | ||
| Basis points above adjusted treasury rate | 25.00% | ||||||
| 3.50% Senior Notes Due May 2027 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.50% | 3.50% | 3.50% | 3.50% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 497,700,000 | $ 497,700,000 | $ 497,700,000 | $ 497,700,000 | 497,200,000 | ||
| Basis points above adjusted treasury rate | 20.00% | ||||||
| 4.50% Senior Notes Due May 2047 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.50% | 4.50% | 4.50% | 4.50% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 493,600,000 | $ 493,600,000 | $ 493,600,000 | $ 493,600,000 | 493,400,000 | ||
| Basis points above adjusted treasury rate | 25.00% | ||||||
| 3.20% Senior Notes Due February 2023 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.20% | 3.20% | 3.20% | 3.20% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 0 | 401,200,000 | 0 | 0 | $ 0 | 599,000,000.0 | |
| Basis points above adjusted treasury rate | 13.00% | ||||||
| Make-whole payment | $ 1,800,000 | ||||||
| Partial repayment | $ 405,300,000 | ||||||
| Loss on extinguishment of debt | $ (4,100,000) | ||||||
| 3.60% Senior Notes Due February 2028 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.60% | 3.60% | 3.60% | 3.60% | |||
| Principal | $ 700,000,000.0 | $ 700,000,000.0 | $ 700,000,000.0 | $ 700,000,000.0 | |||
| Unsecured debt | $ 696,400,000 | $ 696,400,000 | $ 696,400,000 | $ 696,400,000 | 695,700,000 | ||
| Basis points above adjusted treasury rate | 15.00% | ||||||
| 4.10% Senior Notes Due February 2048 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.10% | 4.10% | 4.10% | 4.10% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 592,900,000 | $ 592,900,000 | $ 592,900,000 | $ 592,900,000 | 592,600,000 | ||
| Basis points above adjusted treasury rate | 20.00% | ||||||
| 4.40% Senior Notes Due November 2025 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.40% | 4.40% | 4.40% | 4.40% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 498,000,000.0 | $ 498,000,000.0 | $ 498,000,000.0 | $ 498,000,000.0 | 497,300,000 | ||
| Basis points above adjusted treasury rate | 20.00% | ||||||
| 4.65% Senior Notes Due November 2028 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.65% | 4.65% | 4.65% | 4.65% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 496,800,000 | $ 496,800,000 | $ 496,800,000 | $ 496,800,000 | 496,200,000 | ||
| Basis points above adjusted treasury rate | 25.00% | ||||||
| 5.25% Senior Notes Due November 2048 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 5.25% | 5.25% | 5.25% | 5.25% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 493,600,000 | $ 493,600,000 | $ 493,600,000 | $ 493,600,000 | 493,300,000 | ||
| Basis points above adjusted treasury rate | 30.00% | ||||||
| 3.15% Senior Notes Due August 2029 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.15% | 3.15% | 3.15% | 3.15% | |||
| Principal | $ 800,000,000.0 | $ 800,000,000.0 | $ 800,000,000.0 | $ 800,000,000.0 | |||
| Unsecured debt | $ 795,400,000 | $ 795,400,000 | $ 795,400,000 | $ 795,400,000 | 794,700,000 | ||
| Basis points above adjusted treasury rate | 20.00% | ||||||
| 2.875% Senior Notes Due May 2030 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 2.875% | 2.875% | 2.875% | 2.875% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 595,500,000 | $ 595,500,000 | $ 595,500,000 | $ 595,500,000 | 594,900,000 | ||
| Basis points above adjusted treasury rate | 35.00% | ||||||
| 3.75% Senior Notes Due May 2050 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.75% | 3.75% | 3.75% | 3.75% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 590,300,000 | $ 590,300,000 | $ 590,300,000 | $ 590,300,000 | 589,900,000 | ||
| Basis points above adjusted treasury rate | 40.00% | ||||||
| 2.25% Senior Notes Due August 2031 | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 2.25% | 2.25% | 2.25% | 2.25% | |||
| Principal | $ 1,000,000,000 | $ 1,000,000,000 | $ 1,000,000,000 | $ 1,000,000,000 | |||
| Unsecured debt | 989,200,000 | 989,200,000 | 989,200,000 | $ 989,200,000 | 988,000,000.0 | ||
| Basis points above adjusted treasury rate | 15.00% | ||||||
| Senior notes | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Unsecured debt | $ 10,470,600,000 | $ 10,470,600,000 | $ 10,470,600,000 | $ 10,470,600,000 | 9,773,600,000 | ||
| 3.60% May 2022 Senior Notes | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 3.60% | 3.60% | 3.60% | 3.60% | |||
| Principal | $ 550,000,000.0 | $ 550,000,000.0 | $ 550,000,000.0 | $ 550,000,000.0 | |||
| Unsecured debt | $ 548,500,000 | $ 548,500,000 | $ 548,500,000 | $ 548,500,000 | 0 | ||
| Basis points above adjusted treasury rate | 15.00% | ||||||
| 4.35% May 2022 Senior Notes | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.35% | 4.35% | 4.35% | 4.35% | |||
| Principal | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | $ 600,000,000.0 | |||
| Unsecured debt | $ 597,100,000 | $ 597,100,000 | $ 597,100,000 | $ 597,100,000 | 0 | ||
| Basis points above adjusted treasury rate | 25.00% | ||||||
| 4.75% May 2022 Senior Notes | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 4.75% | 4.75% | 4.75% | 4.75% | |||
| Principal | $ 700,000,000.0 | $ 700,000,000.0 | $ 700,000,000.0 | $ 700,000,000.0 | |||
| Unsecured debt | $ 693,700,000 | $ 693,700,000 | $ 693,700,000 | $ 693,700,000 | 0 | ||
| Basis points above adjusted treasury rate | 30.00% | ||||||
| 5.00% Feb 2023 Senior Notes | Unsecured debt | |||||||
| Schedule of Debt [Line Items] | |||||||
| Coupon rate of notes | 5.00% | 5.00% | 5.00% | 5.00% | |||
| Principal | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | $ 500,000,000.0 | |||
| Unsecured debt | $ 497,100,000 | $ 497,100,000 | $ 497,100,000 | $ 497,100,000 | $ 0 | ||
| Basis points above adjusted treasury rate | 20.00% | ||||||