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Stockholders' Equity - Components of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 11,901.1  
Ending balance 11,041.9 $ 11,901.1
Gains (Losses) on Hedge Instruments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 4.5 (2.9)
Other comprehensive income (loss) before reclassifications (35.0) 12.3
Amounts reclassified from accumulated other comprehensive income (loss) 27.6 (4.9)
Other comprehensive income (loss), net of tax (7.4) 7.4
Ending balance (2.9) 4.5
Unrealized  Gains (Losses) on Available-for-Sale Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (16.0) 29.5
Other comprehensive income (loss) before reclassifications (138.2) (45.5)
Amounts reclassified from accumulated other comprehensive income (loss) 0.0 0.0
Other comprehensive income (loss), net of tax (138.2) (45.5)
Ending balance (154.2) (16.0)
Foreign Currency Translation Gains (Losses)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (7.9) 4.7
Other comprehensive income (loss) before reclassifications 1.3 (12.6)
Amounts reclassified from accumulated other comprehensive income (loss) 0.0 0.0
Other comprehensive income (loss), net of tax 1.3 (12.6)
Ending balance (6.6) (7.9)
Employee Benefit Plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (4.8) (6.4)
Other comprehensive income (loss) before reclassifications 5.8 0.1
Amounts reclassified from accumulated other comprehensive income (loss) 0.2 1.5
Other comprehensive income (loss), net of tax 6.0 1.6
Ending balance 1.2 (4.8)
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (24.2) 24.9
Other comprehensive income (loss) before reclassifications (166.1) (45.7)
Amounts reclassified from accumulated other comprehensive income (loss) 27.8 (3.4)
Other comprehensive income (loss), net of tax (138.3) (49.1)
Ending balance $ (162.5) $ (24.2)