Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 1,553.0	$ 2,151.7
Investments available-for-sale, at fair value:
Fixed maturity securities (amortized cost of $18,021.7 and $17,120.4)	18,236.5	17,467.4
Equity securities (cost of $1,236.7 and $1,303.7)	1,705.4	1,906.6
Other invested assets, current	23.4	20.2
Accrued investment income	168.6	161.4
Premium and self-funded receivables	4,940.8	4,825.5
Other receivables	2,368.0	2,117.0
Income taxes receivable	13.8	308.9
Securities lending collateral	1,718.3	1,515.2
Deferred tax assets, net	295.6	280.4
Other current assets	2,178.8	1,473.9
Total current assets	33,202.2	32,228.2
Long-term investments available-for-sale, at fair value:
Fixed maturity securities (amortized cost of $613.5 and $500.7)	613.7	504.4
Equity securities (cost of $27.3 and $27.0)	31.7	31.5
Other invested assets, long-term	1,803.3	1,695.9
Property and equipment, net	1,931.4	1,944.3
Goodwill	17,541.7	17,082.0
Other intangible assets	8,275.5	7,958.1
Other noncurrent assets	864.3	512.3
Total assets	64,263.8	61,956.7
Liabilities and shareholders' equity
Medical claims payable	7,177.9	6,861.2
Reserves for future policy benefits	67.7	68.1
Other policyholder liabilities	2,741.4	2,626.5
Total policy liabilities	9,987.0	9,555.8
Unearned income	950.5	1,078.1
Accounts payable and accrued expenses	4,433.8	3,651.8
Security trades pending payable	172.5	66.2
Securities lending payable	1,718.2	1,515.3
Short-term borrowings	540.0	400.0
Current portion of long-term debt	624.9	624.3
Other current liabilities	2,246.3	1,861.2
Total current liabilities	20,673.2	18,752.7
Long-term debt, less current portion	15,468.4	14,019.6
Reserves for future policy benefits, noncurrent	607.6	671.3
Deferred tax liabilities, net	3,226.2	3,226.0
Other noncurrent liabilities	1,225.8	1,035.8
Total liabilities	$ 41,201.2	$ 37,705.4
Commitment and contingencies – Note 10
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 – 261,575,584 and 268,109,932	2.6	2.7
Additional paid-in capital	8,707.4	10,062.3
Retained earnings	14,352.2	14,014.4
Accumulated other comprehensive income	0.4	171.9
Total shareholders' equity	23,062.6	24,251.3
Total liabilities and shareholders' equity	$ 64,263.8	$ 61,956.7