CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net income		$ 163.3	$ 122.9
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Change in fair value of contingent consideration		3.0	104.8
Stock-based compensation		61.2	48.6
Depreciation and amortization		133.8	132.0
Deferred tax benefit		(9.1)	(15.0)
Provision for credit losses		68.1	67.8
Other non-cash adjustments		16.7	(42.6)
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable and securitized accounts receivable		(412.2)	(1,701.3)
Prepaid expenses and other current and other long-term assets		(29.1)	(9.0)
Accounts payable		143.5	926.4
Accrued expenses and other current and long-term liabilities		(25.0)	37.3
Income taxes		(14.7)	6.8
Net cash provided by (used for) operating activities		99.5	(321.4)
Cash flows from investing activities
Purchases of property, equipment and capitalized software		(65.3)	(45.6)
Purchase of other investments		(5.0)	0.0
Purchases of available-for-sale debt securities		(1,362.0)	(594.5)
Sales and maturities of available-for-sale debt securities		114.4	29.4
Acquisition of intangible assets		(4.5)	0.0
Net cash used for investing activities		(1,322.4)	(610.7)
Cash flows from financing activities
Net activity from share-based compensation plans		(7.9)	(12.1)
Purchase of treasury shares		(104.0)	(80.6)
Net change in deposits		842.8	797.9
Net change in restricted cash payable		271.5	183.2
Net borrowings on other debt		21.0	59.4
Borrowings on revolving credit facility		1,402.1	1,273.1
Repayments on revolving credit facility		(1,398.1)	(1,212.5)
Repayments on term loans		(31.7)	(31.7)
Borrowings on BTFP		500.0	0.0
Payment of contingent consideration		(27.2)	0.0
Net cash provided by financing activities		1,468.5	976.7
Effect of exchange rates on cash, cash equivalents and restricted cash		13.6	(47.2)
Net change in cash, cash equivalents and restricted cash		259.2	(2.6)
Cash, cash equivalents and restricted cash at beginning of period	[1]	1,859.8	1,256.8
Cash, cash equivalents and restricted cash at end of period	[1]	2,119.0	1,254.3
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Capital expenditures incurred but not paid		8.3	7.1
Purchases of available-for-sale debt securities, unsettled as of period-end		3.6	25.8
Initial deferred liability from acquisition of remaining interest in PO Holding		0.0	216.6
Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents [Roll Forward]
Cash and cash equivalents at beginning of period		922.0	588.9
Restricted cash at beginning of period		937.8	667.9
Cash, cash equivalents and restricted cash at beginning of period	[1]	1,859.8	1,256.8
Cash and cash equivalents at end of period		901.4	438.8
Restricted cash at end of period		1,217.6	815.5
Cash, cash equivalents and restricted cash at end of period	[1]	$ 2,119.0	$ 1,254.3

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within our condensed consolidated balance sheets to amounts within our condensed consolidated statements of cash flows.  Six Months Ended June 30, 20232022Cash and cash equivalents at beginning of period$922.0 $588.9 Restricted cash at beginning of period937.8 667.9 Cash, cash equivalents and restricted cash at beginning of period$1,859.8 $1,256.8 Cash and cash equivalents at end of period$901.4 $438.8 Restricted cash at end of period1,217.6 815.5 Cash, cash equivalents and restricted cash at end of period$2,119.0 $1,254.3