Fair Value (Tables)

9 Months Ended

Sep. 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
September 30, 2015
Cash and cash equivalents	$	7,865		$	118		$	—		$	7,983
Debt securities - available-for-sale:
U.S. government and agency obligations	1,705			199			—			1,904
State and municipal obligations	—			6,142			—			6,142
Corporate obligations	15			7,368			88			7,471
U.S. agency mortgage-backed securities	—			2,047			—			2,047
Non-U.S. agency mortgage-backed securities	—			874			5			879
Total debt securities - available-for-sale	1,720			16,630			93			18,443
Equity securities - available-for-sale	1,137			12			363			1,512
Interest rate swap assets	—			168			—			168
Total assets at fair value	$	10,722		$	16,928		$	456		$	28,106
Percentage of total assets at fair value	38		%	60		%	2		%	100		%
Interest rate swap liabilities	$	—		$	1		$	—		$	1
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
September 30, 2015
Debt securities - held-to-maturity:
U.S. government and agency obligations	$	164	$	—	$	—	$	164	$	162
State and municipal obligations	—		—		15		15		15
Corporate obligations	91		13		241		345		345
Total debt securities - held-to-maturity	$	255	$	13	$	256	$	524	$	522
Other assets	$	—	$	478	$	—	$	478	$	480
Long-term debt and other financing obligations	$	—	$	30,309	$	—	$	30,309	$	28,796
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									Nine Months Ended
(in millions)	Debt Securities			Equity Securities			Total			Debt Securities			Equity Securities			Total
September 30, 2015
Balance at beginning of period	$	84		$	319		$	403		$	74		$	310		$	384
Purchases	12			45			57			22			59			81
Sales	(2		)	(6		)	(8		)	(4		)	(20		)	(24		)
Net unrealized gains in accumulated other comprehensive income	—			6			6			2			1			3
Net realized (losses) gains in investment and other income	(1		)	(1		)	(2		)	(1		)	13			12
Balance at end of period	$	93		$	363		$	456		$	93		$	363		$	456

September 30, 2014
Balance at beginning of period	$	57		$	302		$	359		$	42		$	269		$	311
Purchases	11			36			47			24			86			110
Sales	—			(18		)	(18		)	—			(169		)	(169		)
Net unrealized (losses) gains in accumulated other comprehensive income	(2		)	(4		)	(6		)	—			6			6
Net realized (losses) gains in investment and other income	—			(15		)	(15		)	—			109			109
Balance at end of period	$	66		$	301		$	367		$	66		$	301		$	367

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, except ranges)

Fair Value

Valuation Technique

Unobservable Input

Low

High

September 30, 2015

Equity securities - available-for-sale:

Venture capital portfolios

322

Market approach - comparable companies

Revenue multiple

1.0

5.0

EBITDAmultiple

9.0

10.0

Market approach - recent transactions

Inactive market transactions

N/A

Total equity securities

available-for-sale

363

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
September 30, 2015
Cash and cash equivalents	$	292	$	—	$	292
Debt securities:
U.S. government and agency obligations	444		142		586
State and municipal obligations	—		105		105
Corporate obligations	—		1,292		1,292
U.S. agency mortgage-backed securities	—		391		391
Non-U.S. agency mortgage-backed securities	—		199		199
Total debt securities	444		2,129		2,573
Other investments	—		83		83
Total assets at fair value	$	736	$	2,212	$	2,948
Other liabilities	$	7	$	6	$	13
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