Fair Value (Tables)

9 Months Ended

Sep. 30, 2014

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 a summary of fair value measurements by level and carrying values for items measured at fair value on a recurring basis in the Condensed Consolidated Balance Sheets excluding AARP Program-related assets and liabilities, which are presented in a separate table below:

(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, 2014
Cash and cash equivalents	$	7,221		$	12		$	—		$	7,233
Debt securities - available-for-sale:
U.S. government and agency obligations	1,612			227			—			1,839
State and municipal obligations	—			6,826			—			6,826
Corporate obligations	—			7,490			60			7,550
U.S. agency mortgage-backed securities	—			2,067			—			2,067
Non-U.S. agency mortgage-backed securities	—			884			6			890
Total debt securities - available-for-sale	1,612			17,494			66			19,172
Equity securities - available-for-sale	1,323			12			301			1,636
Interest rate swap assets	—			21			—			21
Total assets at fair value	$	10,156		$	17,539		$	367		$	28,062
Percentage of total assets at fair value	36		%	63		%	1		%	100		%
Interest rate swap liabilities	$	—		$	62		$	—		$	62
December 31, 2013
Cash and cash equivalents	$	7,005		$	271		$	—		$	7,276
Debt securities - available-for-sale:
U.S. government and agency obligations	1,750			445			—			2,195
State and municipal obligations	—			6,977			—			6,977
Corporate obligations	25			7,274			36			7,335
U.S. agency mortgage-backed securities	—			2,218			—			2,218
Non-U.S. agency mortgage-backed securities	—			696			6			702
Total debt securities - available-for-sale	1,775			17,610			42			19,427
Equity securities - available-for-sale	1,291			12			269			1,572
Total assets at fair value	$	10,071		$	17,893		$	311		$	28,275
Percentage of total assets at fair value	36		%	63		%	1		%	100		%
Interest rate swap liabilities	$	—		$	163		$	—		$	163

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, 2014
Debt securities - held-to-maturity:
U.S. government and agency obligations	$	181	$	—	$	—	$	181	$	178
State and municipal obligations	—		—		28		28		28
Corporate obligations	48		9		254		311		311
Total debt securities - held-to-maturity	$	229	$	9	$	282	$	520	$	517
Long-term debt and other financing obligations	$	—	$	16,557	$	—	$	16,557	$	15,047
December 31, 2013
Debt securities - held-to-maturity:
U.S. government and agency obligations	$	182	$	—	$	—	$	182	$	181
State and municipal obligations	—		—		28		28		28
Corporate obligations	47		9		278		334		334
Total debt securities - held-to-maturity	$	229	$	9	$	306	$	544	$	543
Long-term debt and other financing obligations	$	—	$	16,602	$	—	$	16,602	$	15,745

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, 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 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
September 30, 2013
Balance at beginning of period	$	38		$	245		$	283		$	17		$	224		$	241
Purchases	3			9			12			25			51			76
Sales	(7		)	—			(7		)	(7		)	(21		)	(28		)
Net unrealized losses in other comprehensive income	—			(7		)	(7		)	(1		)	(13		)	(14		)
Net realized (losses) gains in investment and other income	(1		)	(1		)	(2		)	(1		)	5			4
Balance at end of period	$	33		$	246		$	279		$	33		$	246		$	279

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
September 30, 2014
Equity securities - available-for-sale
Venture capital portfolios	$	245	Market approach - comparable companies	Revenue multiple	1.0	5.0
				EBITDAmultiple	8.0	10.0
	56		Market approach - recent transactions	Inactive market transactions	N/A	N/A
Total equity securities      available-for-sale	$	301

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, 2014
Cash and cash equivalents	$	330	$	—	$	330
Debt securities:
U.S. government and agency obligations	409		245		654
State and municipal obligations	—		81		81
Corporate obligations	—		1,180		1,180
U.S. agency mortgage-backed securities	—		365		365
Non-U.S. agency mortgage-backed securities	—		166		166
Total debt securities	409		2,037		2,446
Other investments	—		79		79
Total assets at fair value	$	739	$	2,116	$	2,855
Other liabilities	$	4	$	12	$	16
December 31, 2013
Cash and cash equivalents	$	265	$	—	$	265
Debt securities:
U.S. government and agency obligations	426		301		727
State and municipal obligations	—		63		63
Corporate obligations	—		1,145		1,145
U.S. agency mortgage-backed securities	—		414		414
Non-U.S. agency mortgage-backed securities	—		139		139
Total debt securities	426		2,062		2,488
Equity securities - available-for-sale	—		4		4
Total assets at fair value	$	691	$	2,066	$	2,757
Other liabilities	$	3	$	11	$	14