Selected Quarterly Financial Results (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information



	Year Ended December 31, 2019
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales:
Corporate	$	1,736.2	$	1,883.9	$	1,913.5	$	1,965.4

Small Business	355.6		377.4		386.2		391.1

Public:
Government	488.4		578.4		793.4		659.1
Education	400.4		773.6		807.0		430.6
Healthcare	441.9		488.1		500.5		503.4
Total Public	1,330.7		1,840.1		2,100.9		1,593.1
Other	535.4		528.5		507.1		587.3
Net sales	$	3,957.9	$	4,629.9	$	4,907.7	$	4,536.9
Gross profit	672.1		773.8		816.5		777.5
Operating income	228.9		300.3		320.6		283.8
Net income	152.9		196.6		201.7		185.6
Basic⁽¹⁾	1.04		1.35		1.39		1.29
Diluted⁽¹⁾	1.02		1.33		1.37		1.27


	Year Ended December 31, 2018
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales:
Corporate	$	1,565.8	$	1,733.8	$	1,706.5	$	1,836.4

Small Business	327.6		329.5		340.0		362.5

Public:
Government	418.5		493.5		639.3		546.0
Education	397.2		712.1		793.1		425.0
Healthcare	414.3		429.8		442.7		443.2
Total Public	1,230.0		1,635.4		1,875.1		1,414.2
Other	483.0		487.4		451.6		461.7
Net sales	$	3,606.4	$	4,186.1	$	4,373.2	$	4,074.8
Gross profit	603.9		695.6		713.6		693.8
Operating income	204.1		265.5		274.8		242.9
Net income	127.0		173.0		183.7		159.3
Basic⁽¹⁾	0.83		1.14		1.22		1.07
Diluted⁽¹⁾	0.82		1.12		1.20		1.05

(1)

Basic and diluted net income per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net income per share.