CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 2,072.2	$ 2,193.7
Marketable securities	1,838.6	1,393.3
Accounts receivable, net	6,998.6	4,114.7
Inventories	1,983.9	1,916.6
Prepaid expenses and other current assets	444.3	160.8
Total current assets	13,337.6	9,779.1
Marketable securities	3,900.3	3,135.6
Property, plant, and equipment, net	3,358.5	3,221.6
Deferred tax assets	746.6	858.9
Other noncurrent assets	142.9	168.1
Total assets	21,485.9	17,163.3
Current liabilities:
Accounts payable	476.0	475.5
Accrued expenses and other current liabilities	2,018.0	1,644.2
Finance lease liabilities	718.4	0.0
Deferred revenue	520.0	577.7
Total current liabilities	3,732.4	2,697.4
Long-term debt	1,979.2	1,978.5
Finance lease liabilities	0.0	717.2
Deferred revenue	50.7	57.8
Other noncurrent liabilities	596.3	687.1
Total liabilities	6,358.6	6,138.0
Stockholders' equity:
Preferred Stock, $.01 par value; 30,000,000 shares authorized; issued and outstanding - none	0.0	0.0
Additional paid-in capital	7,225.8	6,716.2
Retained earnings	15,107.1	10,893.0
Accumulated other comprehensive income	15.7	29.3
Treasury Stock, at cost; 17,656,256 shares in 2021 and 16,431,520 shares in 2020	(7,221.4)	(6,613.3)
Total stockholders' equity	15,127.3	11,025.3
Total liabilities and stockholders' equity	21,485.9	17,163.3
Class A Stock
Stockholders' equity:
Common stock	0.0	0.0
Total stockholders' equity	0.0	0.0
Common Stock
Stockholders' equity:
Common stock	$ 0.1	$ 0.1