Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 6,772.4	$ 4,075.3
Investments available-for-sale, at fair value:
Fixed maturity securities (amortized cost of $17,694.3 and $16,991.8)	17,949.7	17,163.1
Equity securities (cost of $1,390.3 and $1,076.1)	1,813.3	1,468.5
Other invested assets, current	19.6	15.8
Accrued investment income	149.7	164.5
Premium and self-funded receivables	5,773.0	5,860.8
Other receivables	2,445.6	2,536.6
Income taxes receivable	0.0	168.7
Securities lending collateral	1,234.9	1,079.8
Other current assets	1,823.6	1,781.8
Total current assets	37,981.8	34,314.9
Long-term investments available-for-sale, at fair value:
Fixed maturity securities (amortized cost of $556.5 and $524.6)	560.0	524.4
Equity securities (cost of $27.3 and $27.2)	32.1	31.4
Other invested assets, long-term	2,287.3	2,240.5
Property and equipment, net	1,957.6	1,977.9
Goodwill	17,561.2	17,561.2
Other intangible assets	7,923.0	7,964.9
Other noncurrent assets	640.5	467.9
Total assets	68,943.5	65,083.1
Liabilities and shareholders' equity
Medical claims payable	7,920.6	7,892.6
Reserves for future policy benefits	76.2	71.8
Other policyholder liabilities	2,311.2	2,221.1
Total policy liabilities	10,308.0	10,185.5
Unearned income	1,926.1	971.9
Accounts payable and accrued expenses	3,622.1	4,014.9
Income taxes payable	491.0	0.0
Security trades pending payable	257.7	93.5
Securities lending payable	1,233.4	1,078.9
Short-term borrowings	540.0	440.0
Current portion of long-term debt	1,152.8	928.4
Other current liabilities	3,643.1	3,581.3
Total current liabilities	23,174.2	21,294.4
Long-term debt, less current portion	15,449.9	14,358.5
Reserves for future policy benefits, noncurrent	673.7	666.1
Deferred tax liabilities, net	2,663.9	2,779.9
Other noncurrent liabilities	889.9	883.8
Total liabilities	42,851.6	39,982.7
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 – 265,074,917 and 263,747,395	2.6	2.6
Additional paid-in capital	8,893.4	8,805.1
Retained earnings	17,357.7	16,560.6
Accumulated other comprehensive loss	(161.8)	(267.9)
Total shareholders' equity	26,091.9	25,100.4
Total liabilities and shareholders' equity	$ 68,943.5	$ 65,083.1