Fair Value Measurements - Changes in Level 3 Liabilities (Detail) - Visa Conversion Rate Swap - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Balance at beginning of period | $ 33.4 | $ 32.8 |
Total (Gains) Losses: | ||
Included in Earnings | 18.3 | 17.1 |
Purchases, Issues, Sales, and Settlements | ||
Settlements | (16.4) | (16.5) |
Balance at end of period | 35.3 | 33.4 |
Unrealized (Gains) Losses Included in Earnings Related to Financial Instruments Held at December 31 | $ 18.6 | $ 12.3 |