Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 4,682.0	$ 3,608.9
Investments available-for-sale, at fair value:
Fixed maturity securities, current (amortized cost of $17,152.7 and $17,054.5)	17,081.6	17,377.3
Equity securities, current	2,435.3	3,599.2
Other invested assets, current	23.8	17.2
Accrued investment income	161.6	162.5
Premiums Receivable, Net	4,268.3	3,605.2
Self-Funded Receivables, Net	2,650.0	2,579.7
Other receivables	2,182.6	2,266.5
Income taxes receivable	154.5	341.9
Securities lending collateral	624.6	455.1
Other current assets	3,106.1	2,249.3
Total current assets	37,370.4	36,262.8
Long-term investments available-for-sale, at fair value:
Fixed maturity securities (amortized cost of $489.7 and $556.0)	487.5	560.8
Equity securities	32.9	32.8
Other invested assets, long-term	3,495.2	3,343.8
Property and equipment, net	2,392.2	2,174.9
Goodwill	20,414.5	19,231.2
Other intangible assets	9,224.3	8,368.4
Other noncurrent assets	950.4	565.3
Total assets	74,367.4	70,540.0
Liabilities and shareholders' equity
Medical claims payable	7,545.3	7,991.5
Reserves for future policy benefits	72.1	69.9
Other policyholder liabilities	3,009.8	2,950.3
Total policy liabilities	10,627.2	11,011.7
Unearned income	2,089.9	860.3
Accounts payable and accrued expenses	5,931.4	5,024.4
Security trades pending payable	159.9	112.6
Securities lending payable	624.3	454.4
Short-term borrowings	1,120.0	1,275.0
Current portion of long-term debt	650.2	1,274.6
Other current liabilities	3,302.8	3,343.0
Total current liabilities	24,505.7	23,356.0
Long-term debt, less current portion	17,515.4	17,382.2
Reserves for future policy benefits, noncurrent	644.7	647.3
Deferred tax liabilities, net	1,902.2	1,726.5
Other noncurrent liabilities	1,074.4	925.1
Total liabilities	45,642.4	44,037.1
Commitment and contingencies – Note 11
Shareholders' equity
Preferred stock, without par value, shares authorized – 100,000,000; shares issued and outstanding – none	0.0	0.0
Common stock, par value $0.01, shares authorized – 900,000,000; shares issued and outstanding – 260,132,949 and 256,084,913	2.6	2.6
Additional paid-in capital	9,747.9	8,547.4
Retained earnings	19,757.3	18,054.4
Accumulated other comprehensive loss	(782.8)	(101.5)
Total shareholders' equity	28,725.0	26,502.9
Total liabilities and shareholders' equity	$ 74,367.4	$ 70,540.0