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Leases (Tables)
3 Months Ended
Mar. 31, 2020
Leases [Abstract]  
Future Undiscounted Payments Under Operating Lease Arrangements Under ASC Topic 842 Future payments under operating lease arrangements as of March 31, 2020 are now as follows (in millions):
2020 (remaining)
$
28.8

2021
37.4

2022
29.9

2023
25.9

2024
17.0

Thereafter
88.3

Total lease payments, undiscounted
$
227.3

Less: discount
62.2

Total operating lease liability as of March 31, 2020, at present value
$
165.1

Less: operating lease liability as of March 31, 2020, current
26.7

Operating lease liability as of March 31, 2020, long term
$
138.4