Fair Value (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets and Liabilities, Measured at Fair Value Recurring Basis [Table Text Block]



(in millions)	Quoted Prices in Active Markets (Level 1)			Other Observable Inputs (Level 2)			Unobservable Inputs (Level 3)			Total Fair and Carrying Value
June 30, 2015
Cash and cash equivalents	$	7,754		$	133		$	—		$	7,887
Debt securities - available-for-sale:
U.S. government and agency obligations	1,650			211			—			1,861
State and municipal obligations	—			6,306			—			6,306
Corporate obligations	12			7,609			78			7,699
U.S. agency mortgage-backed securities	—			2,102			—			2,102
Non-U.S. agency mortgage-backed securities	—			834			6			840
Total debt securities - available-for-sale	1,662			17,062			84			18,808
Equity securities - available-for-sale	1,226			12			319			1,557
Interest rate swap assets	—			54			—			54
Total assets at fair value	$	10,642		$	17,261		$	403		$	28,306
Percentage of total assets at fair value	38		%	61		%	1		%	100		%
Interest rate swap liabilities	$	—		$	33		$	—		$	33
December 31, 2014
Cash and cash equivalents	$	7,472		$	23		$	—		$	7,495
Debt securities - available-for-sale:
U.S. government and agency obligations	1,427			193			—			1,620
State and municipal obligations	—			6,668			—			6,668
Corporate obligations	2			7,257			68			7,327
U.S. agency mortgage-backed securities	—			2,056			—			2,056
Non-U.S. agency mortgage-backed securities	—			874			6			880
Total debt securities - available-for-sale	1,429			17,048			74			18,551
Equity securities - available-for-sale	1,200			12			310			1,522
Interest rate swap assets	—			62			—			62
Total assets at fair value	$	10,101		$	17,145		$	384		$	27,630
Percentage of total assets at fair value	37		%	62		%	1		%	100		%
Interest rate swap liabilities	$	—		$	55		$	—		$	55

Fair Value Measurements, Nonrecurring [Table Text Block]

The following table presents a summary of fair value measurements by level and carrying values for certain financial instruments not measured at fair value on a recurring basis in the Condensed Consolidated Balance Sheets:



(in millions)	Quoted Prices in Active Markets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total Fair Value		Total Carrying Value
June 30, 2015
Debt securities - held-to-maturity:
U.S. government and agency obligations	$	185	$	—	$	—	$	185	$	182
State and municipal obligations	—		—		15		15		15
Corporate obligations	92		10		247		349		349
Total debt securities - held-to-maturity	$	277	$	10	$	262	$	549	$	546
Other assets	$	—	$	473	$	—	$	473	$	472
Long-term debt and other financing obligations	$	—	$	17,755	$	—	$	17,755	$	16,664
December 31, 2014
Debt securities - held-to-maturity:
U.S. government and agency obligations	$	180	$	—	$	—	$	180	$	178
State and municipal obligations	—		—		19		19		19
Corporate obligations	46		10		242		298		298
Total debt securities - held-to-maturity	$	226	$	10	$	261	$	497	$	495
Other assets	$	—	$	478	$	—	$	478	$	484
Long-term debt and other financing obligations	$	—	$	18,863	$	—	$	18,863	$	17,085

Reconciliation of Assets Measured at Fair Value on a Recurring Basis Using Level 3 Inputs [Table Text Block]

A reconciliation of the beginning and ending balances of assets measured at fair value on a recurring basis using Level 3 inputs is as follows:



	Three Months Ended									Six Months Ended
(in millions)	Debt Securities			Equity Securities			Total			Debt Securities			Equity Securities			Total
June 30, 2015
Balance at beginning of period	$	79		$	309		$	388		$	74		$	310		$	384
Purchases	6			10			16			10			14			24
Sales	(2		)	(13		)	(15		)	(2		)	(14		)	(16		)
Net unrealized gains (losses) in accumulated other comprehensive income	1			—			1			2			(5		)	(3		)
Net realized gains in investment and other income	—			13			13			—			14			14
Balance at end of period	$	84		$	319		$	403		$	84		$	319		$	403

June 30, 2014
Balance at beginning of period	$	46		$	313		$	359		$	42		$	269		$	311
Purchases	10			6			16			13			50			63
Sales	—			(147		)	(147		)	—			(151		)	(151		)
Net unrealized gains in accumulated other comprehensive income	1			6			7			2			10			12
Net realized gains in investment and other income	—			124			124			—			124			124
Balance at end of period	$	57		$	302		$	359		$	57		$	302		$	359

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

The following table presents quantitative information regarding unobservable inputs that were significant to the valuation of assets measured at fair value on a recurring basis using Level 3 inputs:

Range

(in millions)

Fair Value

Valuation Technique

Unobservable Input

Low

High

June 30, 2015

Equity securities - available-for-sale

Venture capital portfolios

268

Market approach - comparable companies

Revenue multiple

1.0

5.0

EBITDAmultiple

8.0

10.0

Market approach - recent transactions

Inactive market transactions

N/A

Total equity securities

available-for-sale

319

AARP Program [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets and Liabilities, Measured at Fair Value Recurring Basis [Table Text Block]

The following table presents fair value information about the AARP Program-related financial assets and liabilities:



(in millions)	Quoted Prices in Active Markets (Level 1)		Other Observable Inputs (Level 2)		Total Fair and Carrying Value
June 30, 2015
Cash and cash equivalents	$	205	$	—	$	205
Debt securities:
U.S. government and agency obligations	431		164		595
State and municipal obligations	—		96		96
Corporate obligations	—		1,287		1,287
U.S. agency mortgage-backed securities	—		400		400
Non-U.S. agency mortgage-backed securities	—		195		195
Total debt securities	431		2,142		2,573
Other investments	—		85		85
Total assets at fair value	$	636	$	2,227	$	2,863
Other liabilities	$	4	$	6	$	10
December 31, 2014
Cash and cash equivalents	$	415	$	—	$	415
Debt securities:
U.S. government and agency obligations	409		245		654
State and municipal obligations	—		95		95
Corporate obligations	—		1,200		1,200
U.S. agency mortgage-backed securities	—		340		340
Non-U.S. agency mortgage-backed securities	—		177		177
Total debt securities	409		2,057		2,466
Other investments	—		81		81
Total assets at fair value	$	824	$	2,138	$	2,962
Other liabilities	$	5	$	13	$	18