XML 63 R51.htm IDEA: XBRL DOCUMENT v3.19.1
Customer Trust Fund - Gross Unrealized Losses and Related Fair Value of Investment (Detail)
$ in Millions
Mar. 31, 2019
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Less than 12 months, Unrealized Losses $ (0.1)
Less than 12 months, Fair Value 50.1
12 months or more, Unrealized Losses (7.7)
12 months or more, Fair Value 827.0
Total, Unrealized Losses (7.8)
Total, Fair Value 877.1
U.S. Government and Agencies Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
Less than 12 months, Unrealized Losses (0.1)
Less than 12 months, Fair Value 24.7
12 months or more, Unrealized Losses (5.0)
12 months or more, Fair Value 384.6
Total, Unrealized Losses (5.1)
Total, Fair Value 409.3
Canadian and Provincial Government Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
12 months or more, Unrealized Losses (0.3)
12 months or more, Fair Value 98.7
Total, Unrealized Losses (0.3)
Total, Fair Value 98.7
Corporate Debt Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
Less than 12 months, Fair Value 16.4
12 months or more, Unrealized Losses (1.1)
12 months or more, Fair Value 169.3
Total, Unrealized Losses (1.1)
Total, Fair Value 185.7
Asset-backed Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
Less than 12 months, Fair Value 5.0
12 months or more, Unrealized Losses (1.1)
12 months or more, Fair Value 156.7
Total, Unrealized Losses (1.1)
Total, Fair Value 161.7
Mortgage-backed Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
Less than 12 months, Fair Value 4.0
12 months or more, Unrealized Losses (0.1)
12 months or more, Fair Value 7.4
Total, Unrealized Losses (0.1)
Total, Fair Value 11.4
Other Securities [Member]  
Debt Securities, Available-for-sale [Line Items]  
12 months or more, Unrealized Losses (0.1)
12 months or more, Fair Value 10.3
Total, Unrealized Losses (0.1)
Total, Fair Value $ 10.3