Derivatives and Hedging (Tables)

12 Months Ended

Dec. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position

	December 31, 2021						December 31, 2020						December 31, 2019
			Fair Value						Fair Value						Fair Value
	Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities		Notional Amount		Derivative Assets		Derivative Liabilities
	(in millions)
Derivatives designated as hedging instruments:
Fair value hedges
Interest rate swaps (1)	$	1,382.8	$	13.8	$	54.5	$	1,689.9	$	3.3	$	86.1	$	863.0	$	1.8	$	55.5
Total	$	1,382.8	$	13.8	$	54.5	$	1,689.9	$	3.3	$	86.1	$	863.0	$	1.8	$	55.5
Derivatives not designated as hedging instruments (2):
Foreign currency contracts	$	180.1	$	0.2	$	1.4	$	119.2	$	0.7	$	1.2	$	6.7	$	—	$	—
Forward purchase contracts	11,713.5		8.1		18.0		—		—		—		—		—		—
Forward sales contracts	17,358.5		15.8		17.7		—		—		—		—		—		—
Futures purchase contracts (3)	218,053.7		—		—		—		—		—		—		—		—
Futures sales contracts (3)	229,040.0		—		—		—		—		—		—		—		—
Interest rate lock commitments	3,033.2		11.0		1.6		—		—		—		—		—		—
Interest rate swaps	4.1		0.1		0.1		3.5		0.2		0.2		2.9		0.1		0.1
Total	$	479,383.1	$	35.2	$	38.8	$	122.7	$	0.9	$	1.4	$	9.6	$	0.1	$	0.1
Margin			1.2		6.5		—		—		—		—		—		—
Total, including margin	$	479,383.1	$	36.4	$	45.3	$	122.7	$	0.9	$	1.4	$	9.6	$	0.1	$	0.1