Comcast (CMCSA) 10-Q 24 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Jun-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q2
Trading Symbol	'cmcsa
Entity Registrant Name	'COMCAST CORP
Entity Central Index Key	'0001166691
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Large Accelerated Filer
NBCUniversal Media, LLC [Member]	'
Amendment Flag	'false
Entity Registrant Name	'NBCUniversal Media, LLC
Entity Central Index Key	'0000902739
Entity Filer Category	'Non-accelerated Filer
Class A Common Stock [Member]	'
Entity Common Stock, Shares Outstanding	2,149,576,442
ClassA Special Common Stock [Member]	'
Entity Common Stock, Shares Outstanding	429,082,218
Class B Common Stock [Member]	'
Entity Common Stock, Shares Outstanding	9,444,375

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheet (USD $)	Jun. 30, 2014	Dec. 31, 2013
Current Assets:	'	'
Cash and cash equivalents	$1,529,000,000	$1,718,000,000
Investments [Current]	2,325,000,000	3,573,000,000
Receivables, net	6,232,000,000	6,376,000,000
Programming rights	905,000,000	928,000,000
Other current assets	1,781,000,000	1,480,000,000
Total current assets	12,772,000,000	14,075,000,000
Film and television costs	5,208,000,000	4,994,000,000
Investments	3,072,000,000	3,770,000,000
Property and equipment, net	29,970,000,000	29,840,000,000
Franchise rights	59,364,000,000	59,364,000,000
Goodwill	27,323,000,000	27,098,000,000
Other intangible assets, net	17,233,000,000	17,329,000,000
Other noncurrent assets, net	2,517,000,000	2,343,000,000
Total assets	157,459,000,000	158,813,000,000
Current Liabilities:	'	'
Accounts payable and accrued expenses related to trade creditors	5,432,000,000	5,528,000,000
Accrued participations and residuals	1,364,000,000	1,239,000,000
Deferred revenue	847,000,000	898,000,000
Accrued expenses and other current liabilities	6,785,000,000	7,967,000,000
Current portion of long-term debt	2,947,000,000	3,280,000,000
Total current liabilities	17,375,000,000	18,912,000,000
Long-term debt, less current portion	43,602,000,000	44,567,000,000
Deferred income taxes	31,854,000,000	31,935,000,000
Other noncurrent liabilities	11,241,000,000	11,384,000,000
Commitments and contingencies	'	'
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	1,055,000,000	957,000,000
Equity:	'	'
Preferred stock - authorized, 20,000,000 shares; issued, zero	0	0
Common stock	30,000,000	30,000,000
Additional paid-in capital	39,040,000,000	38,890,000,000
Retained earnings	20,432,000,000	19,235,000,000
Treasury stock, 365,460,750 Class A common shares and 70,934,764 Class A Special common shares	-7,517,000,000	-7,517,000,000
Accumulated other comprehensive income (loss)	-14,000,000	56,000,000
Total Comcast Corporation shareholders' equity	51,971,000,000	50,694,000,000
Noncontrolling interests	361,000,000	364,000,000
Total equity	52,332,000,000	51,058,000,000
Total liabilities and equity	157,459,000,000	158,813,000,000
NBCUniversal Media, LLC [Member]	'	'
Current Assets:	'	'
Cash and cash equivalents	827,000,000	967,000,000
Receivables, net	4,668,000,000	4,911,000,000
Programming rights	889,000,000	903,000,000
Other current assets	806,000,000	615,000,000
Total current assets	7,190,000,000	7,396,000,000
Film and television costs	5,200,000,000	4,983,000,000
Investments	881,000,000	884,000,000
Property and equipment, net	7,828,000,000	7,650,000,000
Goodwill	14,905,000,000	14,882,000,000
Intangible assets, net	14,558,000,000	14,857,000,000
Other noncurrent assets, net	1,141,000,000	1,087,000,000
Total assets	51,703,000,000	51,739,000,000
Current Liabilities:	'	'
Accounts payable and accrued expenses related to trade creditors	1,251,000,000	1,583,000,000
Accrued participations and residuals	1,364,000,000	1,239,000,000
Program obligations	618,000,000	657,000,000
Deferred revenue	747,000,000	846,000,000
Accrued expenses and other current liabilities	1,187,000,000	1,465,000,000
Note payable to Comcast	1,532,000,000	799,000,000
Current portion of long-term debt	1,014,000,000	906,000,000
Total current liabilities	7,713,000,000	7,495,000,000
Long-term debt, less current portion	9,243,000,000	10,259,000,000
Accrued participations residuals and program obligations	965,000,000	1,015,000,000
Other noncurrent liabilities	3,444,000,000	3,412,000,000
Commitments and contingencies	'	'
Redeemable noncontrolling interests	319,000,000	231,000,000
Equity:	'	'
Member's capital	29,734,000,000	29,056,000,000
Accumulated other comprehensive income (loss)	5,000,000	-16,000,000
Total NBCUniversal member's equity	29,739,000,000	29,040,000,000
Noncontrolling interests	280,000,000	287,000,000
Total equity	30,019,000,000	29,327,000,000
Total liabilities and equity	51,703,000,000	51,739,000,000
Class A Common Stock [Member]	'	'
Equity:	'	'
Common stock	25,000,000	25,000,000
Class B Common Stock [Member]	'	'
Equity:	'	'
Common stock	0	0
ClassA Special Common Stock [Member]	'	'
Equity:	'	'
Common stock	$5,000,000	$5,000,000

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheet (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Preferred stock, authorized	20,000,000	20,000,000
Preferred stock, issued	0	0
Accumulated depreciation	$44,186	$42,574
Accumulated amortization	9,466	8,874
NBCUniversal Media, LLC [Member]	'	'
Accumulated depreciation	1,920	1,599
Accumulated amortization	$4,351	$4,003
Class A Common Stock [Member]	'	'
Common stock, par value	$0.01	$0.01
Common stock, authorized	7,500,000,000	7,500,000,000
Common stock, issued	2,515,037,192	2,503,535,883
Common stock, outstanding	2,149,576,442	2,138,075,133
Treasury stock common shares	365,460,750	365,460,750
ClassA Special Common Stock [Member]	'	'
Common stock, par value	$0.01	$0.01
Common stock, authorized	7,500,000,000	7,500,000,000
Common stock, issued	500,016,982	529,964,944
Common stock, outstanding	429,082,218	459,030,180
Treasury stock common shares	70,934,764	70,934,764
Class B Common Stock [Member]	'	'
Common stock, par value	$0.01	$0.01
Common stock, authorized	75,000,000	75,000,000
Common stock, issued	9,444,375	9,444,375
Common stock, outstanding	9,444,375	9,444,375

Condensed_Consolidated_Stateme

Condensed Consolidated Statement of Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$16,844,000,000	$16,270,000,000	$34,252,000,000	$31,580,000,000
Costs and Expenses:	'	'	'	'
Programming and production	4,874,000,000	4,968,000,000	10,782,000,000	9,631,000,000
Other operating and administrative	4,924,000,000	4,570,000,000	9,676,000,000	9,036,000,000
Advertising, marketing and promotion	1,242,000,000	1,307,000,000	2,452,000,000	2,454,000,000
Depreciation	1,599,000,000	1,583,000,000	3,168,000,000	3,149,000,000
Amortization	401,000,000	407,000,000	802,000,000	808,000,000
Total costs and expenses	13,040,000,000	12,835,000,000	26,880,000,000	25,078,000,000
Operating income	3,804,000,000	3,435,000,000	7,372,000,000	6,502,000,000
Other Income (Expense):	'	'	'	'
Interest expense	-648,000,000	-636,000,000	-1,290,000,000	-1,289,000,000
Investment income (loss), net	120,000,000	13,000,000	233,000,000	85,000,000
Equity in net income (losses) of investees, net	22,000,000	23,000,000	54,000,000	34,000,000
Other income (expense), net	-39,000,000	-43,000,000	-54,000,000	30,000,000
Nonoperating income (expense)	-545,000,000	-643,000,000	-1,057,000,000	-1,140,000,000
Income before income taxes	3,259,000,000	2,792,000,000	6,315,000,000	5,362,000,000
Income tax expense	-1,234,000,000	-1,048,000,000	-2,352,000,000	-1,973,000,000
Net income	2,025,000,000	1,744,000,000	3,963,000,000	3,389,000,000
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	-33,000,000	-10,000,000	-100,000,000	-218,000,000
Net income attributable to Parent	1,992,000,000	1,734,000,000	3,863,000,000	3,171,000,000
Basic earnings per common share attributable to Comcast Corporation shareholders	$0.77	$0.66	$1.49	$1.20
Diluted earnings per common share attributable to Comcast Corporation shareholders	$0.76	$0.65	$1.47	$1.19
Dividends declared per common share	$0.23	$0.20	$0.45	$0.39
NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	6,016,000,000	5,995,000,000	12,892,000,000	11,335,000,000
Costs and Expenses:	'	'	'	'
Programming and production	2,742,000,000	2,992,000,000	6,484,000,000	5,693,000,000
Other operating and administrative	1,340,000,000	1,204,000,000	2,614,000,000	2,372,000,000
Advertising, marketing and promotion	500,000,000	608,000,000	1,049,000,000	1,126,000,000
Depreciation	176,000,000	156,000,000	338,000,000	307,000,000
Amortization	194,000,000	193,000,000	397,000,000	386,000,000
Total costs and expenses	4,952,000,000	5,153,000,000	10,882,000,000	9,884,000,000
Operating income	1,064,000,000	842,000,000	2,010,000,000	1,451,000,000
Other Income (Expense):	'	'	'	'
Interest expense	-127,000,000	-128,000,000	-256,000,000	-257,000,000
Investment income (loss), net	9,000,000	5,000,000	15,000,000	8,000,000
Equity in net income (losses) of investees, net	11,000,000	16,000,000	29,000,000	27,000,000
Other income (expense), net	-41,000,000	-46,000,000	-77,000,000	-88,000,000
Nonoperating income (expense)	-148,000,000	-153,000,000	-289,000,000	-310,000,000
Income before income taxes	916,000,000	689,000,000	1,721,000,000	1,141,000,000
Income tax expense	-74,000,000	-59,000,000	-138,000,000	-100,000,000
Net income	842,000,000	630,000,000	1,583,000,000	1,041,000,000
Net income attributable to Parent	$814,000,000	$623,000,000	$1,496,000,000	$978,000,000

Condensed_Consolidated_Stateme1

Condensed Consolidated Statement of Income (NBCUniversal) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$16,844,000,000	$16,270,000,000	$34,252,000,000	$31,580,000,000
Costs and Expenses:	'	'	'	'
Programming and production	4,874,000,000	4,968,000,000	10,782,000,000	9,631,000,000
Other operating and administrative	4,924,000,000	4,570,000,000	9,676,000,000	9,036,000,000
Advertising, marketing and promotion	1,242,000,000	1,307,000,000	2,452,000,000	2,454,000,000
Depreciation	1,599,000,000	1,583,000,000	3,168,000,000	3,149,000,000
Amortization	401,000,000	407,000,000	802,000,000	808,000,000
Total costs and expenses	13,040,000,000	12,835,000,000	26,880,000,000	25,078,000,000
Operating income	3,804,000,000	3,435,000,000	7,372,000,000	6,502,000,000
Other Income (Expense):	'	'	'	'
Interest expense	-648,000,000	-636,000,000	-1,290,000,000	-1,289,000,000
Investment income (loss), net	120,000,000	13,000,000	233,000,000	85,000,000
Equity in net income (losses) of investees, net	22,000,000	23,000,000	54,000,000	34,000,000
Other income (expense), net	-39,000,000	-43,000,000	-54,000,000	30,000,000
Nonoperating income (expense)	-545,000,000	-643,000,000	-1,057,000,000	-1,140,000,000
Income before income taxes	3,259,000,000	2,792,000,000	6,315,000,000	5,362,000,000
Income tax expense	-1,234,000,000	-1,048,000,000	-2,352,000,000	-1,973,000,000
Net income	2,025,000,000	1,744,000,000	3,963,000,000	3,389,000,000
Net income attributable to Parent	1,992,000,000	1,734,000,000	3,863,000,000	3,171,000,000
N B C Universal Media L L C [Member]	'	'	'	'
Revenue	6,016,000,000	5,995,000,000	12,892,000,000	11,335,000,000
Costs and Expenses:	'	'	'	'
Programming and production	2,742,000,000	2,992,000,000	6,484,000,000	5,693,000,000
Other operating and administrative	1,340,000,000	1,204,000,000	2,614,000,000	2,372,000,000
Advertising, marketing and promotion	500,000,000	608,000,000	1,049,000,000	1,126,000,000
Depreciation	176,000,000	156,000,000	338,000,000	307,000,000
Amortization	194,000,000	193,000,000	397,000,000	386,000,000
Total costs and expenses	4,952,000,000	5,153,000,000	10,882,000,000	9,884,000,000
Operating income	1,064,000,000	842,000,000	2,010,000,000	1,451,000,000
Other Income (Expense):	'	'	'	'
Interest expense	-127,000,000	-128,000,000	-256,000,000	-257,000,000
Investment income (loss), net	9,000,000	5,000,000	15,000,000	8,000,000
Equity in net income (losses) of investees, net	11,000,000	16,000,000	29,000,000	27,000,000
Other income (expense), net	-41,000,000	-46,000,000	-77,000,000	-88,000,000
Nonoperating income (expense)	-148,000,000	-153,000,000	-289,000,000	-310,000,000
Income before income taxes	916,000,000	689,000,000	1,721,000,000	1,141,000,000
Income tax expense	-74,000,000	-59,000,000	-138,000,000	-100,000,000
Net income	842,000,000	630,000,000	1,583,000,000	1,041,000,000
Net (income) loss attributable to noncontrolling interests	-28,000,000	-7,000,000	-87,000,000	-63,000,000
Net income attributable to Parent	$814,000,000	$623,000,000	$1,496,000,000	$978,000,000

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$2,025,000,000	$1,744,000,000	$3,963,000,000	$3,389,000,000
Unrealized gains (losses) on marketable securities, net of deferred taxes	4,000,000	97,000,000	34,000,000	117,000,000
Deferred gains (losses) on cash flow hedges, net of deferred taxes	4,000,000	1,000,000	2,000,000	-35,000,000
Amounts Reclassified To Net Income:	'	'	'	'
Realized (gains) losses on marketable securities, net of deferred taxes	-47,000,000	'	-97,000,000	-23,000,000
Realized (gains) losses on cash flow hedges, net of deferred taxes	-17,000,000	2,000,000	-20,000,000	48,000,000
Employee benefit obligations, net of deferred taxes	-1,000,000	2,000,000	-1,000,000	3,000,000
Currency translation adjustments, net of deferred taxes	10,000,000	-14,000,000	12,000,000	-31,000,000
Comprehensive income	1,978,000,000	1,832,000,000	3,893,000,000	3,468,000,000
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	-33,000,000	-10,000,000	-100,000,000	-218,000,000
Other comprehensive (income) loss attributable to noncontrolling interests	'	'	'	9,000,000
Comprehensive income attributable to Parent	1,945,000,000	1,822,000,000	3,793,000,000	3,259,000,000
NBCUniversal Media, LLC [Member]	'	'	'	'
Net income	842,000,000	630,000,000	1,583,000,000	1,041,000,000
Unrealized gains (losses) on marketable securities, net of deferred taxes	5,000,000	'	5,000,000	'
Deferred gains (losses) on cash flow hedges, net of deferred taxes	-2,000,000	'	-2,000,000	'
Amounts Reclassified To Net Income:	'	'	'	'
Employee benefit obligations, net of deferred taxes	'	-1,000,000	'	-1,000,000
Currency translation adjustments, net of deferred taxes	15,000,000	-23,000,000	18,000,000	-45,000,000
Comprehensive income	860,000,000	606,000,000	1,604,000,000	995,000,000
Net (income) loss attributable to noncontrolling interests	-28,000,000	-7,000,000	-87,000,000	-63,000,000
Comprehensive income attributable to Parent	$832,000,000	$599,000,000	$1,517,000,000	$932,000,000

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Unrealized gains (losses) on marketable securities, deferred taxes	($2)	($59)	($19)	($71)
Deferred gains (losses) on cash flow hedges, deferred taxes	-2	-1	-1	20
Realized (gains) losses on marketable securities, deferred taxes	28	'	58	12
Realized (gains) losses on cash flow hedges, deferred taxes	10	-1	12	-28
Employee benefit obligations, deferred taxes	'	-1	'	-2
Currency translation adjustments, deferred taxes	($6)	$9	($7)	$14

Condensed_Consolidated_Stateme4

Condensed Consolidated Statement of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities	'	'
Net cash provided by operating activities	$7,547,000,000	$7,685,000,000
Investing Activities	'	'
Capital expenditures	-3,246,000,000	-2,867,000,000
Cash paid for intangible assets	-477,000,000	-444,000,000
Acquisitions and construction of real estate properties	-10,000,000	-1,311,000,000
Acquisitions, net of cash acquired	-406,000,000	-22,000,000
Proceeds from sales of businesses and investments	481,000,000	91,000,000
Return of capital from investees	6,000,000	146,000,000
Purchases of investments	-77,000,000	-641,000,000
Other	-159,000,000	88,000,000
Net cash provided by (used in) investing activities	-3,888,000,000	-4,960,000,000
Financing Activities	'	'
Proceeds from (repayments of) short-term borrowings, net	-343,000,000	348,000,000
Proceeds from borrowings	2,187,000,000	2,933,000,000
Repurchases and repayments of debt	-3,163,000,000	-2,195,000,000
Repurchases and retirements of common stock	-1,500,000,000	-1,000,000,000
Dividends paid	-1,092,000,000	-942,000,000
Issuances of common stock	29,000,000	24,000,000
Purchase of NBCUniversal noncontrolling common equity interest	0	-10,761,000,000
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	-117,000,000	-116,000,000
Settlement of Station Venture liability	0	-602,000,000
Other	151,000,000	24,000,000
Net cash provided by (used in) financing activities	-3,848,000,000	-12,287,000,000
Increase (decrease) in cash and cash equivalents	-189,000,000	-9,562,000,000
Cash and cash equivalents, beginning of period	1,718,000,000	10,951,000,000
Cash and cash equivalents, end of period	1,529,000,000	1,389,000,000
NBCUniversal Media, LLC [Member]	'	'
Operating Activities	'	'
Net cash provided by operating activities	1,789,000,000	2,502,000,000
Investing Activities	'	'
Capital expenditures	-589,000,000	-523,000,000
Cash paid for intangible assets	-58,000,000	-60,000,000
Acquisitions of real estate properties	0	-1,311,000,000
Note receivable from Comcast	0	-1,051,000,000
Return of capital from investees	5,000,000	131,000,000
Purchases of investments	-10,000,000	-82,000,000
Other	-191,000,000	-33,000,000
Net cash provided by (used in) investing activities	-843,000,000	-2,929,000,000
Financing Activities	'	'
Proceeds from (repayments of) borrowings from Comcast, net	733,000,000	0
Repurchases and repayments of debt	-903,000,000	-89,000,000
Redemption Transaction distribution	'	-3,200,000,000
Distributions to noncontrolling interests	-95,000,000	-106,000,000
Distributions to member	-817,000,000	-548,000,000
Settlement of Station Venture liability	0	-602,000,000
Other	-4,000,000	-40,000,000
Net cash provided by (used in) financing activities	-1,086,000,000	-4,585,000,000
Increase (decrease) in cash and cash equivalents	-140,000,000	-5,012,000,000
Cash and cash equivalents, beginning of period	967,000,000	5,921,000,000
Cash and cash equivalents, end of period	$827,000,000	$909,000,000

Condensed_Consolidated_Stateme5

Condensed Consolidated Statement of Changes in Equity (USD $)

Total

NBCUniversal Media, LLC [Member]

Redeemable Noncontrolling Interests And Redeemable Subisdiary Preferred Stock [Member]

Class A Common Stock [Member]

ClassA Special Common Stock [Member]

Class B Common Stock [Member]

Additional Paid-In Capital [Member]

Retained Earnings [Member]

Treasury Stock at Cost [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Noncontrolling Interests [Member]

Noncontrolling Interests [Member]

Redeemable Noncontrolling Interest [Member]

Member's Capital [Member]

In Millions

NBCUniversal Media, LLC [Member]

NBCUniversal Media, LLC [Member]

NBCUniversal Media, LLC [Member]

NBCUniversal Media, LLC [Member]

Beginning balance at Dec. 31, 2012

'

$32,254

'

'

'

'

'

'

'

'

($65)

'

$419

$131

$31,900

Beginning Balance at Dec. 31, 2012

49,796

'

16,998

25

6

0

40,547

16,280

-7,517

15

'

440

'

'

'

Stock compensation plans

84

'

'

'

'

'

296

-212

'

'

'

'

'

'

'

Repurchases and retirements of common stock

-1,000

'

'

'

'

'

-296

-704

'

'

'

'

'

'

'

Employee stock purchase plans

49

'

'

'

'

'

49

'

'

'

'

'

'

'

'

Compensation Plans

'

7

'

'

'

'

'

'

'

'

'

'

'

'

7

Other comprehensive income (loss)

88

-46

-9

'

'

'

'

'

'

88

-46

'

'

'

'

Redemption Transaction distribution

'

-3,200

'

'

'

'

'

'

'

'

'

'

'

'

-3,200

Dividends declared

-1,026

-548

'

'

'

'

'

-1,026

'

'

'

'

'

'

-548

Purchase of NBCUniversal noncontrolling common equity interest

-1,508

'

-17,006

'

'

'

-1,482

'

'

-26

'

'

'

'

'

Redeemable subsidiary preferred stock

'

'

725

'

'

'

'

'

'

'

'

'

'

'

'

Contributions from (distributions to) noncontrolling interests, net

-84

-93

-12

'

'

'

'

'

'

'

'

-84

-93

-12

'

Other

-131

-181

-14

'

'

'

-123

'

'

'

'

-8

-8

'

-173

Net income (loss)

3,218

1,033

171

'

'

'

'

3,171

'

'

'

47

55

8

978

Ending Balance at Jun. 30, 2013

49,486

'

853

25

6

0

38,991

17,509

-7,517

77

'

395

'

'

'

Ending balance at Jun. 30, 2013

'

29,226

'

'

'

'

'

'

'

'

-111

'

373

127

28,964

Beginning balance at Dec. 31, 2013

'

29,327

'

'

'

'

'

'

'

'

-16

'

287

231

29,056

Beginning Balance at Dec. 31, 2013

51,058

'

957

25

5

0

38,890

19,235

-7,517

56

'

364

'

'

'

Stock compensation plans

99

'

'

'

'

'

442

-343

'

'

'

'

'

'

'

Repurchases and retirements of common stock

-1,500

'

'

'

'

'

-345

-1,155

'

'

'

'

'

'

'

Employee stock purchase plans

60

'

'

'

'

'

60

'

'

'

'

'

'

'

'

Other comprehensive income (loss)

-70

21

'

'

'

'

'

'

'

-70

21

'

'

'

'

Dividends declared

-1,168

-817

'

'

'

'

'

-1,168

'

'

'

'

'

'

-817

Issuance of subsidiary shares to noncontrolling interests

13

'

85

'

'

'

'

'

'

'

'

13

'

85

'

Contributions from (distributions to) noncontrolling interests, net

-74

-82

-8

'

'

'

'

'

'

'

'

-74

-82

-13

'

Other

-14

3

-14

'

'

'

-7

'

'

'

'

-7

4

'

-1

Net income (loss)

3,928

1,567

35

'

'

'

'

3,863

'

'

'

65

71

16

1,496

Ending Balance at Jun. 30, 2014

52,332

'

1,055

25

5

0

39,040

20,432

-7,517

-14

'

361

'

'

'

Ending balance at Jun. 30, 2014

'

$30,019

'

'

'

'

'

'

'

'

$5

'

$280

$319

$29,734

Condensed_Consolidated_Financi

Condensed Consolidated Financial Statements	6 Months Ended
	Jun. 30, 2014
Condensed Consolidated Financial Statements	'
	Note 1: Condensed Consolidated Financial Statements
	Basis of Presentation
	We have prepared these unaudited condensed consolidated financial statements based on SEC rules that permit reduced disclosure for interim periods. These financial statements include all adjustments that are necessary for a fair presentation of our consolidated results of operations, financial condition and cash flows for the periods shown, including normal, recurring accruals and other items. The consolidated results of operations for the interim periods presented are not necessarily indicative of results for the full year.
	The year-end condensed consolidated balance sheet was derived from audited financial statements but does not include all disclosures required by generally accepted accounting principles in the United States of America (“GAAP”). For a more complete discussion of our accounting policies and certain other information, refer to our consolidated financial statements included in our 2013 Annual Report on Form 10-K.
NBCUniversal Media, LLC [Member]	'
Condensed Consolidated Financial Statements	'
	Note 1: Condensed Consolidated Financial Statements
	Basis of Presentation
	Unless indicated otherwise, throughout these notes to the condensed consolidated financial statements, we refer to NBCUniversal Media, LLC and its consolidated subsidiaries as “we,” “us” and “our.” We have prepared these unaudited condensed consolidated financial statements based on SEC rules that permit reduced disclosure for interim periods. These financial statements include all adjustments that are necessary for a fair presentation of our consolidated results of operations, financial condition and cash flows for the periods shown, including normal, recurring accruals and other items. The consolidated results of operations for the interim periods presented are not necessarily indicative of results for the full year.
	The year-end condensed consolidated balance sheet was derived from audited financial statements but does not include all disclosures required by generally accepted accounting principles in the United States of America (“GAAP”). For a more complete discussion of our accounting policies and certain other information, refer to our consolidated financial statements included in our 2013 Annual Report on Form 10-K.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
Recent Accounting Pronouncements	'
	Note 2: Recent Accounting Pronouncements
	Discontinued Operations
	In April 2014, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to discontinued operations. The updated accounting guidance provides a narrower definition of discontinued operations than existing GAAP. The updated accounting guidance requires that only disposals of components of an entity, or groups of components, that represent a strategic shift that has or will have a material effect on the reporting entity’s operations be reported in the financial statements as discontinued operations. The updated accounting guidance also provides guidance on the financial statement presentations and disclosures of discontinued operations. The updated accounting guidance will be effective prospectively for us on January 1, 2015, with early adoption permitted in 2014.
	Revenue Recognition
	In May 2014, the FASB and the International Accounting Standards Board updated the accounting guidance related to revenue recognition. The updated accounting guidance provides a single, contract-based revenue recognition model to help improve financial reporting by providing clearer guidance on when an entity should recognize revenue, and by reducing the number of standards to which entities have to refer. The updated accounting guidance will be effective for us on January 1, 2017, and early adoption is not permitted. The updated accounting guidance allows for either a full retrospective adoption or modified retrospective adoption. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements and our method of adoption.
N B C Universal Media L L C [Member]	'
Recent Accounting Pronouncements	'
	Note 2: Recent Accounting Pronouncements
	Discontinued Operations
	In April 2014, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to discontinued operations. The updated accounting guidance provides a narrower definition of discontinued operations than existing GAAP. The updated accounting guidance requires that only disposals of components of an entity, or groups of components, that represent a strategic shift that has or will have a material effect on the reporting entity’s operations be reported in the financial statements as discontinued operations. The updated accounting guidance also provides guidance on the financial statement presentations and disclosures of discontinued operations. The updated accounting guidance will be effective prospectively for us on January 1, 2015, with early adoption permitted in 2014.
	Revenue Recognition
	In May 2014, the FASB and the International Accounting Standards Board updated the accounting guidance related to revenue recognition. The updated accounting guidance provides a single, contract-based revenue recognition model to help improve financial reporting by providing clearer guidance on when an entity should recognize revenue, and by reducing the number of standards to which entities have to refer. The updated accounting guidance will be effective for us on January 1, 2017, and early adoption is not permitted. The updated accounting guidance allows for either a full retrospective adoption or modified retrospective adoption. We are currently in the process of determining the impact that the updated accounting guidance will have on our consolidated financial statements and our method of adoption.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share	'
Earnings Per Share	'
	Note 3: Earnings Per Share
	Computation of Diluted EPS
			Three Months Ended June 30
				2014					2013
	(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
	Basic EPS attributable to Comcast Corporation
		shareholders	$	1,992	2,594	$	0.77	$	1,734	2,631	$	0.66
	Effect of dilutive securities:
		Assumed exercise or issuance of shares relating
		to stock plans			34					35
	Diluted EPS attributable to Comcast
		Corporation shareholders	$	1,992	2,628	$	0.76	$	1,734	2,666	$	0.65
			Six Months Ended June 30
				2014					2013
	(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
	Basic EPS attributable to Comcast Corporation
		shareholders	$	3,863	2,598	$	1.49	$	3,171	2,633	$	1.2
	Effect of dilutive securities:
		Assumed exercise or issuance of shares relating
		to stock plans			38					39
	Diluted EPS attributable to Comcast
		Corporation shareholders	$	3,863	2,636	$	1.47	$	3,171	2,672	$	1.19
	Our potentially dilutive securities include potential common shares related to our stock options and our restricted share units (“RSUs”). Diluted earnings per common share attributable to Comcast Corporation shareholders (“diluted EPS”) considers the impact of potentially dilutive securities using the treasury stock method.
	For the three and six months ended June 30, 2014, diluted EPS excluded 16 million and 9 million, respectively, of potential common shares related to our share-based compensation plans, because the inclusion of the potential common shares would have had an antidilutive effect. For the three and six months ended June 30, 2013, diluted EPS excluded 18 million and 10 million, respectively, of potential common shares.

Significant_Transactions

Significant Transactions	6 Months Ended
	Jun. 30, 2014
Significant Transactions	'
	Note 4: Significant Transactions
	Time Warner Cable Merger
	On February 12, 2014, we entered into an agreement and plan of merger (the “merger agreement”) with Time Warner Cable Inc. (“Time Warner Cable”). As a result of the merger agreement, we will acquire 100% of Time Warner Cable’s outstanding shares of common stock in exchange for shares of our Class A common stock (the “Time Warner Cable merger”). Time Warner Cable stockholders will receive, in exchange for each share of Time Warner Cable common stock owned immediately prior to the Time Warner Cable merger, 2.875 shares of our Class A common stock. Time Warner Cable stockholders will then own approximately 23% of our common stock, an estimate based on the number of shares outstanding as of the date of the merger agreement. Because the exchange ratio was fixed at the time of the merger agreement and the market value of our Class A common stock will continue to fluctuate, the number of shares of Class A common stock to be issued and the total value of the consideration exchanged will not be determinable until the closing date. Following the close of the Time Warner Cable merger, Time Warner Cable will be our wholly owned subsidiary. The Time Warner Cable merger remains subject to shareholder approval at both companies, regulatory review and other customary conditions. It is reasonably possible that the Time Warner Cable merger will close by the end of 2014.
	Divestiture Transactions
	The terms of the merger agreement contemplate that we are prepared to divest systems serving up to approximately 3 million video customers of the combined company to reduce competitive concerns. As a result of this commitment, on April 25, 2014, we entered into a transactions agreement with Charter Communications, Inc. (“Charter”) that, if consummated, would satisfy our divestiture undertaking. Under the transactions agreement, following the close of the Time Warner Cable merger and subject to various conditions, we would divest cable systems resulting in a net disposition of approximately 3.9 million video customers through three transactions: (1) a spin-off of cable systems serving approximately 2.5 million of our video customers (the “spin-off transaction”) into a newly formed public entity (“SpinCo”), (2) an exchange of cable systems serving approximately 1.5 million Time Warner Cable video customers for cable systems serving approximately 1.7 million Charter video customers, and (3) a sale to Charter of cable systems serving approximately 1.5 million Time Warner Cable video customers for cash (collectively, the “divestiture transactions”).
	In connection with the spin-off transaction and prior to the spin-off, it is expected that SpinCo will incur new debt to fund a distribution to us in the form of cash and notes, which will enable us to retire a portion of our debt. In the spin-off transaction, we will distribute common stock of SpinCo pro rata to the holders of all of our outstanding common stock, including the former Time Warner Cable stockholders who continue to hold shares through the record date of the spin-off transaction. After the spin-off transaction, a newly formed, wholly owned indirect subsidiary of Charter will merge with and into Charter with the effect that all shares of Charter will be converted into shares of a new holding company, which will survive as the publicly traded parent company of Charter (“New Charter”). New Charter will then acquire an interest in SpinCo by issuing New Charter stock in exchange for a portion of the outstanding SpinCo stock, following which Comcast shareholders, including the former Time Warner Cable stockholders, are expected to own approximately 67% and New Charter is expected to own approximately 33% of SpinCo.
	The close of the divestiture transactions is subject to the completion of the Time Warner Cable merger, Charter stockholder approval, completion of the SpinCo financing transactions, regulatory approvals and other customary conditions. The Time Warner Cable merger and the divestiture transactions are subject to separate conditions, and the Time Warner Cable merger can be completed regardless of whether the divestiture transactions are ultimately completed.

Related_Party_Transactions

Related Party Transactions (NBCUniversal Media, LLC [Member])	6 Months Ended
	Jun. 30, 2014
NBCUniversal Media, LLC [Member]	'
Related Party Transactions	'
	Note 3: Related Party Transactions
	In the ordinary course of our business, we enter into transactions with Comcast.
	We generate revenue from Comcast primarily from the distribution of our cable network programming and, to a lesser extent, the sale of advertising and our owned programming, and we incur expenses primarily related to various support services provided by Comcast to us.
	In 2013, as part of the Comcast cash management process, we and Comcast entered into a revolving credit agreement under which we can borrow up to $3 billion from Comcast and Comcast can borrow up to $3 billion from us. Amounts owed by us to Comcast under the revolving credit agreement, including accrued interest, are presented under the caption “note payable to Comcast” in our condensed consolidated balance sheet. The revolving credit agreement bears interest at floating rates equal to the interest rate under the Comcast and Comcast Cable Communications, LLC revolving credit facility (the “Comcast revolving credit facility”). The interest rate on the Comcast revolving credit facility consists of a base rate plus a borrowing margin that is determined based on Comcast’s credit rating. As of June 30, 2014, the borrowing margin for our London Interbank Offered Rate-based borrowings was 1.00%.
	In addition, Comcast is the counterparty to one of our contractual obligations. As of June 30, 2014, the carrying value of the liability associated with this contractual obligation was $383 million.
	The following tables present transactions with Comcast and its consolidated subsidiaries that are included in our condensed consolidated financial statements.
	Condensed Consolidated Balance Sheet
			June 30,		December 31,
	(in millions)		2014			2013
	Transactions with Comcast and consolidated subsidiaries
		Receivables, net	$	252	$	228
		Accounts payable and accrued expenses related to trade creditors	$	40	$	56
		Accrued expenses and other current liabilities	$	11	$	37
		Note payable to Comcast	$	1,532	$	799
		Other noncurrent liabilities	$	383	$	383
	Condensed Consolidated Statement of Income
				Three Months Ended				Six Months Ended
			30-Jun				30-Jun
	(in millions)			2014		2013		2014		2013
	Transactions with Comcast and consolidated subsidiaries
		Revenue	$	331	$	302	$	685	$	654
		Operating costs and expenses	$	-40	$	-35	$	-64	$	-97
		Other income (expense)	$	-13	$	-	$	-22	$	-
	Distributions to NBCUniversal Holdings
	In addition to the transactions above, we make distributions to NBCUniversal Holdings on a periodic basis to enable its owners to meet their obligations to pay taxes on taxable income generated by our businesses. We also make quarterly distributions to NBCUniversal Holdings to enable it to make its required quarterly payments to NBCUniversal Enterprise, Inc. (“NBCUniversal Enterprise”) at an initial annual rate of 8.25% on the $9.4 billion aggregate liquidation preference of preferred units. These distributions are presented under the caption “distributions to member” in our condensed consolidated statement of cash flows.

Film_and_Television_Costs

Film and Television Costs	6 Months Ended
	Jun. 30, 2014
Film And Television Costs Disclosure [Text Block]	'
	Note 5: Film and Television Costs
				June 30,		December 31,
	(in millions)			2014		2013
	Film Costs:
		Released, less amortization	$	1,356	$	1,630
		Completed, not released		65		70
		In production and in development		1,077		658
				2,498		2,358
	Television Costs:
		Released, less amortization		1,165		1,155
		In production and in development		361		370
				1,526		1,525
	Programming rights, less amortization			2,089		2,039
				6,113		5,922
	Less: Current portion of programming rights			905		928
	Film and television costs		$	5,208	$	4,994
NBCUniversal Media, LLC [Member]	'
Film And Television Costs Disclosure [Text Block]	'
	Note 4: Film and Television Costs
				June 30,		December 31,
	(in millions)			2014		2013
	Film Costs:
		Released, less amortization	$	1,356	$	1,630
		Completed, not released		65		70
		In production and in development		1,077		658
				2,498		2,358
	Television Costs:
		Released, less amortization		1,165		1,155
		In production and in development		361		370
				1,526		1,525
	Programming rights, less amortization			2,065		2,003
				6,089		5,886
	Less: Current portion of programming rights			889		903
	Film and television costs		$	5,200	$	4,983

Investments

Investments	6 Months Ended
	Jun. 30, 2014
Investments	'
	Note 6: Investments
				June 30,		December 31,
	(in millions)			2014		2013
	Fair Value Method		$	2,387	$	4,345
	Equity Method:
		The Weather Channel		331		333
		Hulu		187		187
		Other		486		469
				1,004		989
	Cost Method:
		AirTouch		1,560		1,553
		Other		446		456
				2,006		2,009
	Total investments			5,397		7,343
	Less: Current investments			2,325		3,573
	Noncurrent investments		$	3,072	$	3,770
	Investment Income (Loss), Net
			Three Months Ended				Six Months Ended
			30-Jun				30-Jun
	(in millions)		2014		2013		2014		2013
	Gains on sales and exchanges of investments, net		$	90	$	3	$	173	$	38
	Investment impairment losses			-19		-4		-24		-13
	Unrealized gains (losses) on securities underlying prepaid
		forward sale agreements		85		247		-28		852
	Mark to market adjustments on derivative component of prepaid
		forward sale agreements and indexed debt instruments		-85		-239		32		-841
	Interest and dividend income			28		26		56		56
	Other, net			21		-20		24		-7
	Investment income (loss), net		$	120	$	13	$	233	$	85
	Fair Value Method
	As of June 30, 2014, the majority of our fair value method investments were equity securities held as collateral that were related to our obligations under prepaid forward sale agreements.
	Prepaid Forward Sale Agreements
			June 30,		December 31,
	(in millions)		2014		2013
	Assets:
		Fair value equity securities held as collateral	$	2,250	$	3,959
	Liabilities:
		Obligations under prepaid forward sale agreements	$	470	$	811
		Derivative component of prepaid forward sale agreements		1,586		2,800
	Total liabilities		$	2,056	$	3,611
	During the six months ended June 30, 2014, we settled $1.5 billion of obligations under certain of our prepaid forward sale agreements by delivering equity securities. As of June 30, 2014, our remaining prepaid forward sale obligations had an estimated fair value of $2.1 billion. The estimated fair value is based on Level 2 inputs using pricing models whose inputs are derived primarily from or corroborated by observable market data through correlation or other means for substantially the full term of the financial instrument.
	Cost Method
	AirTouch
	We hold two series of preferred stock of AirTouch Communications, Inc. (“AirTouch”), a subsidiary of Verizon Communications Inc., which are redeemable in April 2020. As of June 30, 2014, the estimated fair values of the AirTouch preferred stock and the associated liability related to the redeemable preferred shares issued by one of our consolidated subsidiaries were each $1.7 billion. The estimated fair values are based on Level 2 inputs using pricing models whose inputs are derived primarily from or corroborated by observable market data through correlation or other means for substantially the full term of the financial instrument.
NBCUniversal Media, LLC [Member]	'
Investments	'
	Note 5: Investments
				June 30,		December 31,
	(in millions)			2014		2013
	Fair Value Method		$	19	$	11
	Equity Method:
		The Weather Channel		331		333
		Hulu		187		187
		Other		333		332
				851		852
	Cost Method			19		21
	Total investments			889		884
	Less: Current investments			8		-
	Noncurrent Investments		$	881	$	884

LongTerm_Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2014
Long-Term Debt	'
	Note 7: Long-Term Debt
	As of June 30, 2014, our debt had a carrying value of $46.5 billion and an estimated fair value of $52.6 billion. The estimated fair value of our publicly traded debt is based on Level 1 inputs using quoted market values for the debt. The estimated fair value of debt for which there are no quoted market prices is based on Level 2 inputs using interest rates available to us for debt with similar terms and remaining maturities.
	Debt Borrowings and Repayments
	In February 2014, we issued $1.2 billion aggregate principal amount of 3.60% senior notes due 2024 and $1 billion aggregate principal amount of 4.75% senior notes due 2044. The proceeds from this offering were used for working capital and general corporate purposes, including the repayment of a portion of our outstanding commercial paper and our $900 million aggregate principal amount of 2.10% senior notes due April 2014 at maturity.
	In January 2014, we repaid at maturity $1 billion aggregate principal amount of 5.30% senior notes due 2014. In February 2014, we repaid $1.25 billion of borrowings outstanding under NBCUniversal Enterprise Inc.’s (“NBCUniversal Enterprise”) revolving credit facility with the proceeds from $990 million of borrowings under its new commercial paper program and cash on hand.
	Revolving Credit Facilities
	As of June 30, 2014, amounts available under our consolidated revolving credit facilities, net of amounts outstanding under our commercial paper programs and outstanding letters of credit, totaled $6.3 billion, which included $340 million available under NBCUniversal Enterprise’s revolving credit facility.
	Commercial Paper Programs
	In February 2014, NBCUniversal Enterprise entered into a commercial paper program. The maximum borrowing capacity under this commercial paper program is $1.35 billion, and it is supported by NBCUniversal Enterprise’s existing $1.35 billion revolving credit facility due March 2018. The commercial paper program is fully and unconditionally guaranteed by us and our 100% owned cable holding company subsidiaries, Comcast Cable Communications, LLC (“CCCL Parent”), Comcast MO Group, Inc. (“Comcast MO Group”), Comcast Cable Holdings, LLC (“CCH”) and Comcast MO of Delaware, LLC (“Comcast MO of Delaware”) (collectively, the “cable guarantors”). As of June 30, 2014, NBCUniversal Enterprise had $1 billion face amount of commercial paper outstanding.
NBCUniversal Media, LLC [Member]	'
Long-Term Debt	'
	Note 6: Long-Term Debt
	As of June 30, 2014, our debt, excluding the note payable to Comcast, had a carrying value of $10.3 billion and an estimated fair value of $11.4 billion. The estimated fair value of our publicly traded debt is based on Level 1 inputs using quoted market values for the debt. The estimated fair value of debt for which there are no quoted market prices is based on Level 2 inputs using interest rates available to us for debt with similar terms and remaining maturities.
	Debt Repayments
	In April 2014, we repaid $900 million aggregate principal amount of 2.10% senior notes due April 2014 at maturity.
	Cross-Guarantee Structure
	In 2013, we, Comcast and certain of Comcast’s 100% owned cable holding company subsidiaries (the “cable guarantors”) entered into a series of agreements and supplemental indentures to include us as a part of Comcast’s existing cross-guarantee structure. As members of the cross-guarantee structure, Comcast and the cable guarantors fully and unconditionally guarantee our public debt securities, and we fully and unconditionally guarantee all of Comcast’s and the cable guarantors’ public debt securities. As of June 30, 2014, we guaranteed $30.7 billion of outstanding debt securities of Comcast and the cable guarantors. We also fully and unconditionally guarantee the $6.25 billion Comcast revolving credit facility due 2017, of which no amounts were outstanding as of June 30, 2014.
	We do not, however, guarantee the obligations of NBCUniversal Enterprise with respect to its $4 billion aggregate principal amount of senior notes, $1.35 billion revolving credit facility and associated commercial paper program, or $725 million liquidation preference of Series A cumulative preferred stock.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Measurements	'
	Note 8: Fair Value Measurements
	The accounting guidance related to financial assets and financial liabilities (“financial instruments”) establishes a hierarchy that prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach and cost approach). Level 1 consists of financial instruments whose values are based on quoted market prices for identical financial instruments in an active market. Level 2 consists of financial instruments that are valued using models or other valuation methodologies. These models use inputs that are observable either directly or indirectly. Level 3 consists of financial instruments whose values are determined using pricing models that use significant inputs that are primarily unobservable, discounted cash flow methodologies or similar techniques, as well as financial instruments for which the determination of fair value requires significant management judgment or estimation. Our financial instruments that are accounted for at fair value on a recurring basis are presented in the table below.
	Recurring Fair Value Measures
			Fair Value as of
			30-Jun-14								31-Dec-13
	(in millions)			Level 1		Level 2		Level 3		Total		Total
	Assets
	Trading securities		$	2,248	$	-	$	-	$	2,248	$	3,956
	Available-for-sale securities			9		119		10		138		389
	Interest rate swap agreements			-		108		-		108		110
	Other			-		78		1		79		81
	Total		$	2,257	$	305	$	11	$	2,573	$	4,536
	Liabilities
	Derivative component of prepaid forward sale agreements
		and indexed debt instruments	$	-	$	1,600	$	-	$	1,600	$	2,816
	Contractual obligation			-		-		788		788		747
	Contingent consideration			-		-		664		664		684
	Other			-		12		-		12		16
	Total		$	-	$	1,612	$	1,452	$	3,064	$	4,263
	Fair Value of Redeemable Subsidiary Preferred Stock Financial Instrument
	As of June 30, 2014, the fair value of the NBCUniversal Enterprise redeemable subsidiary preferred stock was $759 million. The estimated fair value is based on Level 2 inputs using pricing models whose inputs are derived primarily from or corroborated by observable market data through correlation or other means for substantially the full term of the financial instrument.
	Contractual Obligation and Contingent Consideration
	The estimated fair values of the contractual obligation and contingent consideration in the table above are primarily based on certain expected future discounted cash flows, the determination of which involves the use of significant unobservable inputs. The most significant unobservable inputs we use include our estimates of the future revenue we expect to generate from certain NBCUniversal businesses, which are related to our contractual obligation, and future net tax benefits that will affect payments to General Electric Company (“GE”), which are related to contingent consideration. The discount rates used in the measurements of fair value were between 5% and 13% and are based on the underlying risk associated with our estimate of future revenue, the terms of the respective contracts, and the uncertainty in the timing of our payments to GE. The fair value adjustments to contractual obligation and contingent consideration are sensitive to the assumptions related to future revenue and tax benefits, respectively, as well as to current interest rates, and therefore, the adjustments are recorded to other income (expense), net in our condensed consolidated statement of income.
	Changes in Contractual Obligation and Contingent Consideration
	(in millions)		Contractual Obligation		Contingent Consideration
	Balance, December 31, 2013	$	747	$	684
	Fair value adjustments		68		16
	Payments		-27		-36
	Balance, June 30, 2014	$	788	$	664
NBCUniversal Media, LLC [Member]	'
Fair Value Measurements	'
	Note 7: Fair Value Measurements
	The accounting guidance related to financial assets and financial liabilities (“financial instruments”) establishes a hierarchy that prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach and cost approach). Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of financial instruments and their classification within the fair value hierarchy.
	Our financial instruments that are accounted for at fair value on a recurring basis were not material for all periods presented, except for the liability associated with our contractual obligation. The estimated fair value of the contractual obligation is primarily based on certain expected future discounted cash flows, the determination of which involves the use of significant unobservable inputs. As the inputs used are not quoted market prices or observable inputs, we classify the contractual obligation as a Level 3 financial instrument.
	The most significant unobservable inputs we use include our estimates of the future revenue we expect to generate from certain of our businesses. The discount rates used in the measurement of fair value were between 12% and 13% and are based on the underlying risk associated with our estimate of future revenue and the terms of the respective contract. The fair value adjustments to the contractual obligation are sensitive to the assumptions related to future revenue, as well as to current interest rates, and therefore, the adjustments are recorded to other income (expense), net in our condensed consolidated statement of income.
	Changes in Contractual Obligation
	(in millions)		Contractual Obligation
	Balance, December 31, 2013	$	747
	Fair value adjustments		68
	Payments		-27
	Balance, June 30, 2014	$	788

ShareBased_Compensation

Share-Based Compensation	6 Months Ended
	Jun. 30, 2014
Share-Based Compensation	'
	Note 9: Share-Based Compensation
	Our share-based compensation primarily consists of awards of stock options and RSUs to certain employees and directors as part of our approach to long-term incentive compensation. Additionally, through our employee stock purchase plans, employees are able to purchase shares of Comcast Class A common stock at a discount through payroll deductions.
	In March 2014, we granted 16.4 million stock options and 5.4 million RSUs related to our annual management awards. The weighted-average fair values associated with these grants were $11.09 per stock option and $46.57 per RSU.
	Recognized Share-Based Compensation Expense
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)	2014		2013			2014		2013
	Stock options	$	47	$	36		$	83	$	68
	Restricted share units		68		48			116		86
	Employee stock purchase plans		7		5			13		11
	Total	$	122	$	89		$	212	$	165
	As of June 30, 2014, we had unrecognized pretax compensation expense of $392 million and $529 million related to nonvested stock options and nonvested RSUs, respectively.
NBCUniversal Media, LLC [Member]	'
Share-Based Compensation	'
	Note 8: Share-Based Compensation
	Comcast maintains share-based compensation plans that primarily consist of awards of stock options and restricted share units (“RSUs”) to certain employees and directors as part of its approach to long-term incentive compensation. Additionally, through Comcast’s employee stock purchase plans, employees are able to purchase shares of its Class A common stock at a discount through payroll deductions. Certain of our employees participate in these plans and the expense associated with their participation is settled in cash with Comcast.
	Recognized Share-Based Compensation Expense
		Three Months Ended				Six Months Ended
		30-Jun				30-Jun
	(in millions)	2014		2013		2014		2013
	Stock options	$	6	$	4	$	9	$	7
	Restricted share units		24		12		37		19
	Employee stock purchase plans		2		1		4		3
	Total	$	32	$	17	$	50	$	29

Supplemental_Financial_Informa

Supplemental Financial Information	6 Months Ended
	Jun. 30, 2014
Supplemental Financial Information	'
	Note 10: Supplemental Financial Information
	Receivables
		June 30,		December 31,
	(in millions)	2014		2013
	Receivables, gross	$	6,749	$	6,972
	Less: Allowance for returns and customer incentives		290		375
	Less: Allowance for doubtful accounts		227		221
	Receivables, net	$	6,232	$	6,376
	Accumulated Other Comprehensive Income (Loss)
			June 30,		June 30,
	(in millions)		2014		2013
	Unrealized gains (losses) on marketable securities		$	4	$	277
	Deferred gains (losses) on cash flow hedges			-63		-54
	Unrecognized gains (losses) on employee benefit obligations			70		-107
	Cumulative translation adjustments			-25		-39
	Accumulated other comprehensive income (loss), net of deferred taxes		$	-14	$	77
	Net Cash Provided by Operating Activities
					Six Months Ended
					30-Jun
	(in millions)				2014		2013
	Net income				$	3,963	$	3,389
	Adjustments to reconcile net income to net cash provided by operating activities:
		Depreciation and amortization				3,970		3,957
		Share-based compensation				266		213
		Noncash interest expense (income), net				87		81
		Equity in net (income) losses of investees, net				-54		-34
		Cash received from investees				50		72
		Net (gain) loss on investment activity and other				-113		-91
		Deferred income taxes				-22		87
	Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
		Current and noncurrent receivables, net				60		58
		Film and television costs, net(a)				-28		750
		Accounts payable and accrued expenses related to trade creditors				-168		-87
		Other operating assets and liabilities				-464		-710
	Net cash provided by operating activities				$	7,547	$	7,685
	Comprised of additions to our film and television cost assets of $5,007 million and $3,330 million, net of film and television cost amortization of $4,979 million and $4,080 million in 2014 and 2013, respectively.
	Cash Payments for Interest and Income Taxes
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)		2014		2013			2014		2013
	Interest	$	541	$	515		$	1,164	$	1,132
	Income taxes	$	1,718	$	1,761		$	1,904	$	2,222
	Noncash Investing and Financing Activities
	During the six months ended June 30, 2014:
	• we acquired $879 million of property and equipment and intangible assets that were accrued but unpaid
	• we recorded a liability of $583 million for a quarterly cash dividend of $0.225 per common share paid in July 2014
	• we used $1.5 billion of equity securities to settle our obligations under prepaid forward sale agreements
NBCUniversal Media, LLC [Member]	'
Supplemental Financial Information	'
	Note 9: Supplemental Financial Information
	Receivables
		June 30,		December 31,
	(in millions)	2014		2013
	Receivables, gross	$	5,022	$	5,348
	Less: Allowance for returns and customer incentives		288		372
	Less: Allowance for doubtful accounts		66		65
	Receivables, net	$	4,668	$	4,911
	Accumulated Other Comprehensive Income (Loss)
			June 30,		June 30,
	(in millions)		2014		2013
	Unrealized gains (losses) on marketable securities		$	5	$	-
	Deferred gains (losses) on cash flow hedges			-7		-
	Unrecognized gains (losses) on employee benefit obligations			45		-51
	Cumulative translation adjustments			-38		-60
	Accumulated other comprehensive income (loss), net of deferred taxes		$	5	$	-111
	Net Cash Provided by Operating Activities
					Six Months Ended
					30-Jun
	(in millions)				2014		2013
	Net income				$	1,583	$	1,041
	Adjustments to reconcile net income to net cash provided by operating activities:
		Depreciation and amortization				735		693
		Share-based compensation				-		7
		Equity in net (income) losses of investees, net				-29		-27
		Cash received from investees				35		58
		Net (gain) loss on investment activity and other				45		61
		Deferred income taxes				44		2
	Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
		Current and noncurrent receivables, net				154		26
		Film and television costs, net(a)				-40		726
		Accounts payable and accrued expenses related to trade creditors				-280		-198
		Other operating assets and liabilities				-458		113
	Net cash provided by operating activities				$	1,789	$	2,502
	Comprised of additions to our film and television cost assets of $4,999 million and $3,319 million, net of film and television cost amortization of $4,959 million and $4,045 million in 2014 and 2013, respectively.
	Cash Payments for Interest and Income Taxes
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)		2014		2013			2014		2013
	Interest	$	220	$	204		$	256	$	224
	Income taxes	$	57	$	47		$	110	$	102
	Noncash Investing and Financing Activities
	During the six months ended June 30, 2014:
	• we acquired $198 million of property and equipment and intangible assets that were accrued but unpaid

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies	'
	Note 11: Commitments and Contingencies
	Contingencies
	Antitrust Cases
	We are defendants in two purported class actions originally filed in December 2003 in the United States District Courts for the District of Massachusetts and the Eastern District of Pennsylvania. The potential class in the Massachusetts case, which has been transferred to the Eastern District of Pennsylvania, is our customer base in the “Boston Cluster” area, and the potential class in the Pennsylvania case is our customer base in the “Philadelphia and Chicago Clusters,” as those terms are defined in the complaints. In each case, the plaintiffs allege that certain customer exchange transactions with other cable providers resulted in unlawful horizontal market restraints in those areas and seek damages under antitrust statutes, including treble damages.
	Classes of Chicago Cluster and Philadelphia Cluster customers were certified in October 2007 and January 2010, respectively. We appealed the class certification in the Philadelphia Cluster case to the Third Circuit Court of Appeals, which affirmed the class certification in August 2011. In June 2012, the U.S. Supreme Court granted our petition to review the Third Circuit Court of Appeals’ ruling and in March 2013, the Supreme Court ruled that the class had been improperly certified and reversed the judgment of the Third Circuit. The matter has been returned to the District Court for action consistent with the Supreme Court’s opinion. In August 2013, the plaintiffs in the Philadelphia Cluster case moved to certify a new, smaller class, which we opposed in January 2014. The parties have been discussing possible resolution of the Philadelphia Cluster case. Accordingly, in February 2014, the plaintiff filed an unopposed motion to stay the case, which the District Court granted. In April 2014, the District Court granted our unopposed motion to de-certify the Chicago Cluster class and the plaintiffs’ unopposed motion to amend the Pennsylvania case so as to dismiss claims relating to the Chicago Cluster. In April 2014, lead counsel for the Boston Cluster cases withdrew, and in June 2014, new counsel requested the Boston Cluster cases be transferred to the federal court in Boston, which we have opposed.
	In addition, we are the defendant in 22 purported class actions filed in federal district courts throughout the country. All of these actions have been consolidated by the Judicial Panel on Multidistrict Litigation in the United States District Court for the Eastern District of Pennsylvania for pre-trial proceedings. In a consolidated complaint filed in November 2009 on behalf of all plaintiffs in the multidistrict litigation, the plaintiffs allege that we improperly “tie” the rental of set-top boxes to the provision of premium cable services in violation of Section 1 of the Sherman Antitrust Act, various state antitrust laws and unfair/deceptive trade practices acts in California, Illinois and Alabama. The plaintiffs also allege a claim for unjust enrichment and seek relief on behalf of a nationwide class of our premium cable customers and on behalf of subclasses consisting of premium cable customers from California, Alabama, Illinois, Pennsylvania and Washington. In January 2010, we moved to compel arbitration of the plaintiffs’ claims for unjust enrichment and violations of the unfair/deceptive trade practices acts of Illinois and Alabama. In September 2010, the plaintiffs filed an amended complaint alleging violations of additional state antitrust laws and unfair/deceptive trade practices acts on behalf of new subclasses in Connecticut, Florida, Minnesota, Missouri, New Jersey, New Mexico and West Virginia. In the amended complaint, plaintiffs omitted their unjust enrichment claim, as well as their state law claims on behalf of the Alabama, Illinois and Pennsylvania subclasses. In June 2011, the plaintiffs filed another amended complaint alleging only violations of Section 1 of the Sherman Antitrust Act, antitrust law in Washington and unfair/deceptive trade practices acts in California and Washington. The plaintiffs seek relief on behalf of a nationwide class of our premium cable customers and on behalf of subclasses consisting of premium cable customers from California and Washington. In July 2011, we moved to compel arbitration of most of the plaintiffs’ claims and to stay the remaining claims pending arbitration. The West Virginia Attorney General also filed a complaint in West Virginia state court in July 2009 alleging that we improperly “tie” the rental of set-top boxes to the provision of digital cable services in violation of the West Virginia Antitrust Act and the West Virginia Consumer Credit and Protection Act. The Attorney General also alleges a claim for unjust enrichment/restitution. We removed the case to the United States District Court for West Virginia, and it was subsequently transferred to the United States District Court for the Eastern District of Pennsylvania and consolidated with the multidistrict litigation described above. In June 2013, a comprehensive settlement agreement for all 23 cases was submitted to the District Court for preliminary approval. Regardless of whether this settlement agreement is approved, we do not expect these cases to have a material effect on our results of operations, cash flows or financial position.
	We believe the claims in each of the pending actions described above in this item are without merit, except as otherwise set forth above, and intend to defend the actions vigorously. We cannot predict the outcome of any of the actions described above, including a range of possible loss, or how the final resolution of any such actions would impact our results of operations or cash flows for any one period or our financial position. In addition, as any action nears a trial, there is an increased possibility that the action may be settled by the parties. Nevertheless, the final disposition of any of the above actions is not expected to have a material adverse effect on our consolidated financial position, but could possibly be material to our consolidated results of operations or cash flows for any one period.
	Other
	We are a defendant in several unrelated lawsuits claiming infringement of various patents relating to various aspects of our businesses. In certain of these cases other industry participants are also defendants, and also in certain of these cases we expect that any potential liability would be in part or in whole the responsibility of our equipment and technology vendors under applicable contractual indemnification provisions. We are also subject to other legal proceedings and claims that arise in the ordinary course of our business. While the amount of ultimate liability with respect to such actions is not expected to materially affect our results of operations, cash flows or financial position, any litigation resulting from any such legal proceedings or claims could be time consuming, costly and injure our reputation.

Financial_Data_by_Business_Seg

Financial Data by Business Segment	6 Months Ended
	Jun. 30, 2014
Financial Data by Business Segment	'
	Note 12: Financial Data by Business Segment
	We present our operations in five reportable business segments:
	• Cable Communications: Consists of the operations of Comcast Cable, which is the nation’s largest provider of video, high-speed Internet and voice services (“cable services”) to residential customers under the XFINITY brand, and we also provide similar services to businesses and sell advertising.
	• Cable Networks: Consists primarily of our national cable networks, our regional sports networks, our international cable networks and our cable television production operations.
	• Broadcast Television: Consists primarily of the NBC and Telemundo broadcast networks, our NBC and Telemundo owned local broadcast television stations, and our broadcast television production operations.
	• Filmed Entertainment: Consists primarily of the studio operations of Universal Pictures, which produces, acquires, markets and distributes filmed entertainment worldwide.
	• Theme Parks: Consists primarily of our Universal theme parks in Orlando and Hollywood.
	In evaluating the profitability of our operating segments, the components of net income (loss) below operating income (loss) before depreciation and amortization are not separately evaluated by our management. Our financial data by business segment is presented in the tables below.
			Three Months Ended June 30, 2014
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	11,029	$	4,564	$	1,604	$	2,960	$	1,493
	NBCUniversal
		Cable Networks(b)		2,476		914		180		734		8
		Broadcast Television		1,816		240		27		213		26
		Filmed Entertainment(b)		1,176		195		5		190		3
		Theme Parks		615		244		73		171		158
		Headquarters and Other(c)		4		-159		85		-244		103
		Eliminations(d)		-71		-		-		-		-
	NBCUniversal			6,016		1,434		370		1,064		298
	Corporate and Other			172		-182		26		-208		7
	Eliminations(d)			-373		-12		-		-12		-
	Comcast Consolidated		$	16,844	$	5,804	$	2,000	$	3,804	$	1,798
			Three Months Ended June 30, 2013
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	10,467	$	4,335	$	1,623	$	2,712	$	1,240
	NBCUniversal
		Cable Networks(b)		2,413		860		182		678		24
		Broadcast Television		1,732		206		26		180		9
		Filmed Entertainment(b)		1,388		33		3		30		1
		Theme Parks		546		231		73		158		147
		Headquarters and Other(c)		9		-137		65		-202		79
		Eliminations(d)		-93		-2		-		-2		-
	NBCUniversal			5,995		1,191		349		842		260
	Corporate and Other			136		-119		17		-136		6
	Eliminations(d)			-328		18		1		17		-
	Comcast Consolidated		$	16,270	$	5,425	$	1,990	$	3,435	$	1,506
			Six Months Ended June 30, 2014
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	21,786	$	8,964	$	3,188	$	5,776	$	2,638
	NBCUniversal
		Cable Networks(b)		4,981		1,809		369		1,440		19
		Broadcast Television		4,437		362		54		308		37
		Filmed Entertainment(b)		2,527		483		10		473		4
		Theme Parks		1,102		414		142		272		302
		Headquarters and Other(c)		6		-322		160		-482		227
		Eliminations(d)		-161		-1		-		-1		-
	NBCUniversal			12,892		2,745		735		2,010		589
	Corporate and Other			346		-335		47		-382		19
	Eliminations(d)			-772		-32		-		-32		-
	Comcast Consolidated		$	34,252	$	11,342	$	3,970	$	7,372	$	3,246
			Six Months Ended June 30, 2013
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	20,684	$	8,554	$	3,231	$	5,323	$	2,334
	NBCUniversal
		Cable Networks(b)		4,638		1,719		366		1,353		48
		Broadcast Television		3,249		171		51		120		17
		Filmed Entertainment(b)		2,604		102		7		95		3
		Theme Parks		1,008		404		145		259		285
		Headquarters and Other(c)		18		-249		124		-373		170
		Eliminations(d)		-182		-3		-		-3		-
	NBCUniversal			11,335		2,144		693		1,451		523
	Corporate and Other			298		-202		32		-234		10
	Eliminations(d)			-737		-37		1		-38		-
Comcast Consolidated		$	31,580	$	10,459	$	3,957	$	6,502	$	2,867
For the three and six months ended June 30, 2014 and 2013, Cable Communications segment revenue was derived from the following sources:
		Three Months Ended				Six Months Ended
		30-Jun				30-Jun
		2014		2013		2014		2013
Residential:
	Video	47.5	%	49.4	%	47.8	%	49.7	%
	High-speed Internet	25.6	%	24.5	%	25.6	%	24.6	%
	Voice	8.4	%	8.7	%	8.5	%	8.8	%
Business services		8.7	%	7.5	%	8.6	%	7.4	%
Advertising		5.4	%	5.3	%	5.1	%	5.1	%
Other		4.4	%	4.6	%	4.4	%	4.4	%
Total		100	%	100	%	100	%	100	%
Subscription revenue received from customers who purchase bundled services at a discounted rate is allocated proportionally to each service based on the individual service’s price on a stand-alone basis.
For both the three and six months ended June 30, 2014, 2.8% of Cable Communications segment revenue was derived from franchise and other regulatory fees. For the three and six months ended June 30, 2013, 2.8% and 2.9%, respectively, of Cable Communications segment revenue was derived from franchise and other regulatory fees.
Beginning in 2014, Fandango, our movie ticketing and entertainment business that was previously presented in our Cable Networks segment, is now presented in the Filmed Entertainment segment to reflect the change in our management reporting presentation. Due to immateriality, prior period amounts have not been adjusted. The change in presentation resulted in the reclassification of $195 million of goodwill from our Cable Networks segment to our Filmed Entertainment segment.
NBCUniversal Headquarters and Other activities includes costs associated with overhead, allocations, personnel costs and headquarter initiatives.
Included in Eliminations are transactions that our segments enter into with one another. The most common types of transactions are the following:
our Cable Networks and Broadcast Television segments generate revenue by selling programming to our Cable Communications segment, which represents a substantial majority of the revenue elimination amount
our Cable Communications segment generates revenue by selling advertising and by selling the use of satellite feeds to our Cable Networks segment
our Filmed Entertainment and Broadcast Television segments generate revenue by licensing content to our Cable Networks segment
our Cable Communications segment receives incentives offered by our Cable Networks segment in connection with its distribution of the Cable Networks’ content that are recorded as a reduction to programming expenses
No single customer accounted for a significant amount of revenue in any period.
We use operating income (loss) before depreciation and amortization, excluding impairment charges related to fixed and intangible assets and gains or losses on the sale of assets, if any, as the measure of profit or loss for our operating segments. This measure eliminates the significant level of noncash depreciation and amortization expense that results from the capital-intensive nature of certain of our businesses and from intangible assets recognized in business combinations. Additionally, it is unaffected by our capital structure or investment activities. We use this measure to evaluate our consolidated operating performance and the operating performance of our operating segments and to allocate resources and capital to our operating segments. It is also a significant performance measure in our annual incentive compensation programs. We believe that this measure is useful to investors because it is one of the bases for comparing our operating performance with that of other companies in our industries, although our measure may not be directly comparable to similar measures used by other companies. This measure should not be considered a substitute for operating income (loss), net income (loss) attributable to Comcast Corporation, net cash provided by operating activities, or other measures of performance or liquidity we have reported in accordance with GAAP.
NBCUniversal Media, LLC [Member]	'
Financial Data by Business Segment	'
	Note 10: Financial Data by Business Segment
	We present our operations in four reportable business segments:
	• Cable Networks: Consists primarily of our national cable networks, our regional sports networks, our international cable networks and our cable television production operations.
	• Broadcast Television: Consists primarily of the NBC and Telemundo broadcast networks, our NBC and Telemundo owned local broadcast television stations, and our broadcast television production operations.
	• Filmed Entertainment: Consists primarily of the studio operations of Universal Pictures, which produces, acquires, markets and distributes filmed entertainment worldwide.
	• Theme Parks: Consists primarily of our Universal theme parks in Orlando and Hollywood.
	In evaluating the profitability of our operating segments, the components of net income (loss) below operating income (loss) before depreciation and amortization are not separately evaluated by our management. Our financial data by business segment is presented in the tables below.
			Three Months Ended June 30, 2014
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
		Cable Networks(a)	$	2,476	$	914	$	180	$	734	$	8
		Broadcast Television		1,816		240		27		213		26
		Filmed Entertainment(a)		1,176		195		5		190		3
		Theme Parks		615		244		73		171		158
		Headquarters and Other(b)		4		-159		85		-244		103
		Eliminations(c)		-71		-		-		-		-
	Total		$	6,016	$	1,434	$	370	$	1,064	$	298
			Three Months Ended June 30, 2013
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
		Cable Networks(a)	$	2,413	$	860	$	182	$	678	$	24
		Broadcast Television		1,732		206		26		180		9
		Filmed Entertainment(a)		1,388		33		3		30		1
		Theme Parks		546		231		73		158		147
		Headquarters and Other(b)		9		-137		65		-202		79
		Eliminations(c)		-93		-2		-		-2		-
	Total		$	5,995	$	1,191	$	349	$	842	$	260
			Six Months Ended June 30, 2014
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Networks(a)		$	4,981	$	1,809	$	369	$	1,440	$	19
	Broadcast Television			4,437		362		54		308		37
	Filmed Entertainment(a)			2,527		483		10		473		4
	Theme Parks			1,102		414		142		272		302
	Headquarters and Other(b)			6		-322		160		-482		227
	Eliminations(c)			-161		-1		-		-1		-
	Total		$	12,892	$	2,745	$	735	$	2,010	$	589
			Six Months Ended June 30, 2013
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Networks(a)		$	4,638	$	1,719	$	366	$	1,353	$	48
	Broadcast Television			3,249		171		51		120		17
	Filmed Entertainment(a)			2,604		102		7		95		3
	Theme Parks			1,008		404		145		259		285
	Headquarters and Other(b)			18		-249		124		-373		170
	Eliminations(c)			-182		-3		-		-3		-
	Total		$	11,335	$	2,144	$	693	$	1,451	$	523
	Beginning in 2014, Fandango, our movie ticketing and entertainment business that was previously presented in our Cable Networks segment, is now presented in the Filmed Entertainment segment to reflect the change in our current management reporting presentation. Due to immateriality, prior period amounts have not been adjusted. The change in presentation resulted in the reclassification of $195 million of goodwill from our Cable Networks segment to our Filmed Entertainment segment.
	Headquarters and Other activities include costs associated with overhead, personnel costs and headquarter initiatives.
	Included in Eliminations are transactions that our segments enter into with one another, which consist primarily of the licensing of film and television content from our Filmed Entertainment and Broadcast Television segments to our Cable Networks segment.
	No single customer accounted for a significant amount of revenue in any period.
	We use operating income (loss) before depreciation and amortization, excluding impairment charges related to fixed and intangible assets and gains or losses on the sale of assets, if any, as the measure of profit or loss for our operating segments. This measure eliminates the significant level of noncash amortization expense that results from intangible assets recognized in business combinations. Additionally, it is unaffected by our capital structure or investment activities. We use this measure to evaluate our consolidated operating performance and the operating performance of our operating segments and to allocate resources and capital to our operating segments. It is also a significant performance measure in our annual incentive compensation programs. We believe that this measure is useful to investors because it is one of the bases for comparing our operating performance with that of other companies in our industries, although our measure may not be directly comparable to similar measures used by other companies. This measure should not be considered a substitute for operating income (loss), net income (loss) attributable to NBCUniversal, net cash provided by operating activities, or other measures of performance or liquidity we have reported in accordance with GAAP.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2014
Condensed Consolidating Financial Information [Abstract]	'
Condensed Consolidating Financial Information	'
	Note 13: Condensed Consolidating Financial Information
	Comcast Corporation (“Comcast Parent”), our cable guarantors and NBCUniversal Media, LLC (referred to as “NBCUniversal Media Parent” in the tables below) have fully and unconditionally guaranteed each other’s debt securities. Comcast MO Group, CCH and Comcast MO of Delaware are collectively referred to as the “Combined CCHMO Parents.”
	Comcast Parent and the cable guarantors also fully and unconditionally guarantee NBCUniversal Enterprise’s $4 billion aggregate principal amount of senior notes, its $1.35 billion revolving credit facility due March 2018 and the associated commercial paper program. NBCUniversal Media Parent does not guarantee the NBCUniversal Enterprise senior notes, credit facility or commercial paper program.
	Comcast Parent provides an unconditional subordinated guarantee of the $185 million principal amount currently outstanding of Comcast Holdings’ ZONES due October 2029. Neither the cable guarantors nor NBCUniversal Media Parent guarantee the Comcast Holdings’ ZONES due October 2029. None of Comcast Parent, the cable guarantors nor NBCUniversal Media Parent guarantee the $62 million principal amount currently outstanding of Comcast Holdings’ ZONES due November 2029.
	Condensed Consolidating Balance Sheet
	30-Jun-14
	(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
	Assets
		Cash and cash equivalents	$	-	$	-	$	-	$	-	$	307	$	1,222	$	-	$	1,529
		Investments		-		-		-		-		8		2,317		-		2,325
		Receivables, net		-		-		-		-		-		6,232		-		6,232
		Programming rights		-		-		-		-		-		905		-		905
		Other current assets		227		-		-		-		35		1,519		-		1,781
	Total current assets			227		-		-		-		350		12,195		-		12,772
	Film and television costs			-		-		-		-		-		5,208		-		5,208
	Investments			21		-		-		-		374		2,677		-		3,072
	Investments in and amounts due from subsidiaries eliminated upon consolidation			81,329		100,649		107,347		57,057		40,511		91,705		-478,598		-
	Property and equipment, net			209		-		-		-		-		29,761		-		29,970
	Franchise rights			-		-		-		-		-		59,364		-		59,364
	Goodwill			-		-		-		-		-		27,323		-		27,323
	Other intangible assets, net			10		-		-		-		-		17,223		-		17,233
	Other noncurrent assets, net			1,179		148		-		-		97		2,065		-972		2,517
	Total assets		$	82,975	$	100,797	$	107,347	$	57,057	$	41,332	$	247,521	$	-479,570	$	157,459
	Liabilities and Equity
		Accounts payable and accrued expenses related to  trade creditors	$	11	$	-	$	-	$	-	$	-	$	5,421	$	-	$	5,432
		Accrued participations and residuals		-		-		-		-		-		1,364		-		1,364
		Accrued expenses and other current liabilities		1,501		283		193		47		322		5,286		-		7,632
		Current portion of long-term debt		900		-		-		-		1,011		1,036		-		2,947
	Total current liabilities			2,412		283		193		47		1,333		13,107		-		17,375
	Long-term debt, less current portion			26,489		132		1,827		1,502		9,220		4,432		-		43,602
	Deferred income taxes			-		738		-		-		59		31,885		-828		31,854
	Other noncurrent liabilities			2,103		-		-		-		981		8,301		-144		11,241
	Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		1,055		-		1,055
	Equity:
		Common stock		30		-		-		-		-		-		-		30
		Other shareholders’ equity		51,941		99,644		105,327		55,508		29,739		188,380		-478,598		51,941
	Total Comcast Corporation
		shareholders’ equity		51,971		99,644		105,327		55,508		29,739		188,380		-478,598		51,971
	Noncontrolling interests			-		-		-		-		-		361		-		361
	Total equity			51,971		99,644		105,327		55,508		29,739		188,741		-478,598		52,332
	Total liabilities and equity		$	82,975	$	100,797	$	107,347	$	57,057	$	41,332	$	247,521	$	-479,570	$	157,459
	Condensed Consolidating Balance Sheet
	31-Dec-13
	(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
	Assets
		Cash and cash equivalents	$	-	$	-	$	-	$	-	$	336	$	1,382	$	-	$	1,718
		Investments		-		-		-		-		-		3,573		-		3,573
		Receivables, net		-		-		-		-		-		6,376		-		6,376
		Programming rights		-		-		-		-		-		928		-		928
		Other current assets		237		-		-		-		35		1,208		-		1,480
	Total current assets			237		-		-		-		371		13,467		-		14,075
	Film and television costs			-		-		-		-		-		4,994		-		4,994
	Investments			11		-		-		-		374		3,385		-		3,770
	Investments in and amounts due from subsidiaries eliminated upon consolidation			79,956		97,429		102,673		54,724		40,644		85,164		-460,590		-
	Property and equipment, net			220		-		-		-		-		29,620		-		29,840
	Franchise rights			-		-		-		-		-		59,364		-		59,364
	Goodwill			-		-		-		-		-		27,098		-		27,098
	Other intangible assets, net			11		-		-		-		-		17,318		-		17,329
	Other noncurrent assets, net			1,078		145		-		-		103		1,899		-882		2,343
	Total assets		$	81,513	$	97,574	$	102,673	$	54,724	$	41,492	$	242,309	$	-461,472	$	158,813
	Liabilities and Equity
		Accounts payable and accrued expenses related to trade creditors	$	8	$	-	$	-	$	-	$	-	$	5,520	$	-	$	5,528
		Accrued participations and residuals		-		-		-		-		-		1,239		-		1,239
	Accrued expenses and other current liabilities		1,371		266		180		47		323		6,678		-		8,865
	Current portion of long-term debt		2,351		-		-		-		903		26		-		3,280
Total current liabilities			3,730		266		180		47		1,226		13,463		-		18,912
Long-term debt, less current portion			25,170		132		1,827		1,505		10,236		5,697		-		44,567
Deferred income taxes			-		777		-		-		59		31,840		-741		31,935
Other noncurrent liabilities			1,919		-		-		-		931		8,675		-141		11,384
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		957		-		957
Equity:
	Common stock		30		-		-		-		-		-		-		30
	Other shareholders’ equity		50,664		96,399		100,666		53,172		29,040		181,313		-460,590		50,664
Total Comcast Corporation shareholders’ equity			50,694		96,399		100,666		53,172		29,040		181,313		-460,590		50,694
Noncontrolling interests			-		-		-		-		-		364		-		364
Total equity			50,694		96,399		100,666		53,172		29,040		181,677		-460,590		51,058
Total liabilities and equity		$	81,513	$	97,574	$	102,673	$	54,724	$	41,492	$	242,309	$	-461,472	$	158,813
Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,270	$	-	$	16,270
	Management fee revenue		225		-		219		137		-		-		-581		-
			225		-		219		137		-		16,270		-581		16,270
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,968		-		4,968
	Other operating and administrative		101		-		219		137		205		4,489		-581		4,570
	Advertising, marketing and promotion		-		-		-		-		-		1,307		-		1,307
	Depreciation		8		-		-		-		-		1,575		-		1,583
	Amortization		2		-		-		-		-		405		-		407
			111		-		219		137		205		12,744		-581		12,835
Operating income (loss)			114		-		-		-		-205		3,526		-		3,435
Other Income (Expense):
	Interest expense		-383		-2		-46		-33		-123		-49		-		-636
	Investment income (loss), net		1		6		-		-		5		1		-		13
	Equity in net income (losses) of
	investees, net		1,910		1,909		1,835		1,349		951		646		-8,577		23
	Other income (expense), net		-1		-		2		-		-		-44		-		-43
			1,527		1,913		1,791		1,316		833		554		-8,577		-643
Income (loss) before income taxes			1,641		1,913		1,791		1,316		628		4,080		-8,577		2,792
Income tax (expense) benefit			93		-1		16		12		-5		-1,163		-		-1,048
Net income (loss)			1,734		1,912		1,807		1,328		623		2,917		-8,577		1,744
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-10		-		-10
Net income (loss)
	attributable to Comcast Corporation	$	1,734	$	1,912	$	1,807	$	1,328	$	623	$	2,907	$	-8,577	$	1,734
Comprehensive
	income (loss) attributable to Comcast Corporation	$	1,822	$	1,905	$	1,808	$	1,328	$	599	$	3,007	$	-8,647	$	1,822
Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	31,580	$	-	$	31,580
	Management fee revenue		443		-		431		270		-		-		-1,144		-
			443		-		431		270		-		31,580		-1,144		31,580
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,631		-		9,631
	Other operating and administrative		199		-		431		270		430		8,850		-1,144		9,036
	Advertising, marketing and promotion		-		-		-		-		-		2,454		-		2,454
	Depreciation		15		-		-		-		-		3,134		-		3,149
	Amortization		3		-		-		-		-		805		-		808
			217		-		431		270		430		24,874		-1,144		25,078
Operating income (loss)			226		-		-		-		-430		6,706		-		6,502
Other Income (Expense):
	Interest expense		-759		-5		-124		-66		-243		-92		-		-1,289
	Investment income (loss), net		2		3		-		-		1		79		-		85
	Equity in net income
	(losses) of investees, net		3,518		3,651		3,598		2,611		1,660		1,012		-16,016		34
	Other income (expense), net		-2		-		2		-		-		30		-		30
			2,759		3,649		3,476		2,545		1,418		1,029		-16,016		-1,140
Income (loss) before income taxes			2,985		3,649		3,476		2,545		988		7,735		-16,016		5,362
Income tax (expense) benefit			186		1		43		23		-10		-2,216		-		-1,973
Net income (loss)			3,171		3,650		3,519		2,568		978		5,519		-16,016		3,389
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-218		-		-218
Net income (loss) attributable
	to Comcast Corporation	$	3,171	$	3,650	$	3,519	$	2,568	$	978	$	5,301	$	-16,016	$	3,171
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,259	$	3,643	$	3,522	$	2,568	$	932	$	5,414	$	-16,079	$	3,259
Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities		$	-147	$	12	$	-43	$	-41	$	-711	$	8,477	$	-	$	7,547
Investing Activities
	Net transactions with affiliates		2,674		-12		43		41		1,583		-4,329		-		-
	Capital expenditures		-4		-		-		-		-		-3,242		-		-3,246
	Cash paid for intangible assets		-2		-		-		-		-		-475		-		-477
	Acquisitions and construction of real estate properties		-		-		-		-		-		-10		-		-10
	Acquisitions, net of cash acquired		-		-		-		-		-		-406		-		-406
	Proceeds from sales of businesses and investments		-		-		-		-		2		479		-		481
	Return of capital from investees		-		-		-		-		-		6		-		6
	Purchases of investments		-10		-		-		-		-6		-61		-		-77
	Other		-		-		-		-		4		-163		-		-159
Net cash provided by (used in) investing activities			2,658		-12		43		41		1,583		-8,201		-		-3,888
Financing Activities
	Proceeds from (repayments of) short-term borrowings, net		-1,350		-		-		-		-		1,007		-		-343
	Proceeds from borrowings		2,184		-		-		-		-		3		-		2,187
	Repurchases and repayments of debt		-1,000		-		-		-		-901		-1,262		-		-3,163
	Repurchases and retirements of common stock		-1,500		-		-		-		-		-		-		-1,500
	Dividends paid		-1,092		-		-		-		-		-		-		-1,092
	Issuances of common stock		29		-		-		-		-		-		-		29
	Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		-117		-		-117
	Other		218		-		-		-		-		-67		-		151
Net cash provided by (used in) financing activities			-2,511		-		-		-		-901		-436		-		-3,848
Increase (decrease) in cash and cash equivalents			-		-		-		-		-29		-160		-		-189
Cash and cash equivalents, beginning of period			-		-		-		-		336		1,382		-		1,718
Cash and cash equivalents, end of period		$	-	$	-	$	-	$	-	$	307	$	1,222	$	-	$	1,529
Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities		$	-181	$	-8	$	-120	$	-47	$	-582	$	8,623	$	-	$	7,685
Investing Activities
	Net transactions with affiliates		-1,301		8		2,217		47		-984		13		-		-
	Capital expenditures		-2		-		-		-		-		-2,865		-		-2,867
	Cash paid for intangible assets		-1		-		-		-		-		-443		-		-444
	Acquisitions and construction of real estate properties		-		-		-		-		-		-1,311		-		-1,311
	Acquisitions, net of cash acquired		-		-		-		-		-		-22		-		-22
	Proceeds from sales of businesses and investments		-		-		-		-		-		91		-		91
	Return of capital from investees		-		-		-		-		128		18		-		146
	Purchases of investments		-8		-		-		-		-2		-631		-		-641
	Other		-		-		-		-		-10		98		-		88
Net cash provided by (used in) investing activities			-1,312		8		2,217		47		-868		-5,052		-		-4,960
Financing Activities
	Proceeds from (repayments of) short-term borrowings, net		350		-		-		-		-		-2		-		348
	Proceeds from borrowings		2,933		-		-		-		-		-		-		2,933
	Repurchases and repayments of debt		-		-		-2,097		-		-88		-10		-		-2,195
	Repurchases and retirements of common stock		-1,000		-		-		-		-		-		-		-1,000
	Dividends paid		-942		-		-		-		-		-		-		-942
	Issuances of common stock		24		-		-		-		-		-		-		24
	Purchase of NBCUniversal noncontrolling common equity interest		-		-		-		-		-3,200		-7,561		-		-10,761
	Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		-116		-		-116
	Settlement of Station Venture liability		-		-		-		-		-		-602		-		-602
	Other		128		-		-		-		-40		-64		-		24
Net cash provided by (used in) financing activities			1,493		-		-2,097		-		-3,328		-8,355		-		-12,287
Increase (decrease) in cash and cash equivalents			-		-		-		-		-4,778		-4,784		-		-9,562
Cash and cash equivalents, beginning of period			-		-		-		-		5,129		5,822		-		10,951
Cash and cash equivalents, end of period		$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389
Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,844	$	-	$	16,844
	Management fee revenue		237		-		231		145		-		-		-613		-
			237		-		231		145		-		16,844		-613		16,844
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,874		-		4,874
	Other operating and administrative		181		-		231		145		237		4,743		-613		4,924
	Advertising, marketing and promotion		-		-		-		-		-		1,242		-		1,242
	Depreciation		8		-		-		-		-		1,591		-		1,599
	Amortization		2		-		-		-		-		399		-		401
			191		-		231		145		237		12,849		-613		13,040
Operating income (loss)			46		-		-		-		-237		3,995		-		3,804
Other Income (Expense):
	Interest expense		-400		-3		-44		-30		-125		-46		-		-648
	Investment income (loss), net		1		-		-		-		4		115		-		120
	Equity in net income
	(losses) of investees, net		2,222		1,908		1,774		1,554		1,171		836		-9,443		22
	Other income (expense), net		-		-		-		-		7		-46		-		-39
			1,823		1,905		1,730		1,524		1,057		859		-9,443		-545
Income (loss) before income taxes			1,869		1,905		1,730		1,524		820		4,854		-9,443		3,259
Income tax (expense) benefit			123		1		15		11		-6		-1,378		-		-1,234
Net income (loss)			1,992		1,906		1,745		1,535		814		3,476		-9,443		2,025
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-33		-		-33
Net income (loss) attributable
	to Comcast Corporation	$	1,992	$	1,906	$	1,745	$	1,535	$	814	$	3,443	$	-9,443	$	1,992
Comprehensive income (loss)
	attributable to Comcast Corporation	$	1,945	$	1,912	$	1,744	$	1,535	$	832	$	3,401	$	-9,424	$	1,945
Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	34,252	$	-	$	34,252
	Management fee revenue		467		-		454		286		-		-		-1,207		-
			467		-		454		286		-		34,252		-1,207		34,252
Costs and Expenses:
	Programming and production		-		-		-		-		-		10,782		-		10,782
	Other operating and administrative		274		-		454		286		494		9,375		-1,207		9,676
	Advertising, marketing and promotion		-		-		-		-		-		2,452		-		2,452
	Depreciation		15		-		-		-		-		3,153		-		3,168
	Amortization		3		-		-		-		-		799		-		802
			292		-		454		286		494		26,561		-1,207		26,880
Operating income (loss)			175		-		-		-		-494		7,691		-		7,372
Other Income (Expense):
	Interest expense		-787		-6		-89		-59		-249		-100		-		-1,290
	Investment income (loss), net		2		3		-		-		5		223		-		233
	Equity in net income
	(losses) of investees, net		4,260		4,175		3,939		3,065		2,242		1,550		-19,177		54
	Other income (expense), net		-		-		-		-		3		-57		-		-54
			3,475		4,172		3,850		3,006		2,001		1,616		-19,177		-1,057
Income (loss) before income taxes			3,650		4,172		3,850		3,006		1,507		9,307		-19,177		6,315
Income tax (expense) benefit			213		1		31		21		-11		-2,607		-		-2,352
Net income (loss)			3,863		4,173		3,881		3,027		1,496		6,700		-19,177		3,963
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-100		-		-100
Net income (loss) attributable
	to Comcast Corporation	$	3,863	$	4,173	$	3,881	$	3,027	$	1,496	$	6,600	$	-19,177	$	3,863
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,793	$	4,181	$	3,882	$	3,028	$	1,517	$	6,535	$	-19,143	$	3,793

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share	'
Computation of diluted EPS	'
	Computation of Diluted EPS
			Three Months Ended June 30
				2014					2013
	(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
	Basic EPS attributable to Comcast Corporation
		shareholders	$	1,992	2,594	$	0.77	$	1,734	2,631	$	0.66
	Effect of dilutive securities:
		Assumed exercise or issuance of shares relating
		to stock plans			34					35
	Diluted EPS attributable to Comcast
		Corporation shareholders	$	1,992	2,628	$	0.76	$	1,734	2,666	$	0.65
			Six Months Ended June 30
				2014					2013
	(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
	Basic EPS attributable to Comcast Corporation
		shareholders	$	3,863	2,598	$	1.49	$	3,171	2,633	$	1.2
	Effect of dilutive securities:
		Assumed exercise or issuance of shares relating
		to stock plans			38					39
	Diluted EPS attributable to Comcast
		Corporation shareholders	$	3,863	2,636	$	1.47	$	3,171	2,672	$	1.19

Related_Party_Transactions_Tab

Related Party Transactions (Tables) (NBCUniversal Media, LLC [Member])	6 Months Ended
	Jun. 30, 2014
NBCUniversal Media, LLC [Member]	'
Related Party Transactions Condensed Financial Statements	'
	Condensed Consolidated Balance Sheet
			June 30,		December 31,
	(in millions)		2014			2013
	Transactions with Comcast and consolidated subsidiaries
		Receivables, net	$	252	$	228
		Accounts payable and accrued expenses related to trade creditors	$	40	$	56
		Accrued expenses and other current liabilities	$	11	$	37
		Note payable to Comcast	$	1,532	$	799
		Other noncurrent liabilities	$	383	$	383
	Condensed Consolidated Statement of Income
				Three Months Ended				Six Months Ended
			30-Jun				30-Jun
	(in millions)			2014		2013		2014		2013
	Transactions with Comcast and consolidated subsidiaries
		Revenue	$	331	$	302	$	685	$	654
		Operating costs and expenses	$	-40	$	-35	$	-64	$	-97
		Other income (expense)	$	-13	$	-	$	-22	$	-

Film_and_Television_Costs_Tabl

Film and Television Costs (Tables)	6 Months Ended
	Jun. 30, 2014
Film and Television Costs	'
				June 30,		December 31,
	(in millions)			2014		2013
	Film Costs:
		Released, less amortization	$	1,356	$	1,630
		Completed, not released		65		70
		In production and in development		1,077		658
				2,498		2,358
	Television Costs:
		Released, less amortization		1,165		1,155
		In production and in development		361		370
				1,526		1,525
	Programming rights, less amortization			2,089		2,039
				6,113		5,922
	Less: Current portion of programming rights			905		928
	Film and television costs		$	5,208	$	4,994
NBCUniversal Media, LLC [Member]	'
Film and Television Costs	'
				June 30,		December 31,
	(in millions)			2014		2013
	Film Costs:
		Released, less amortization	$	1,356	$	1,630
		Completed, not released		65		70
		In production and in development		1,077		658
				2,498		2,358
	Television Costs:
		Released, less amortization		1,165		1,155
		In production and in development		361		370
				1,526		1,525
	Programming rights, less amortization			2,065		2,003
				6,089		5,886
	Less: Current portion of programming rights			889		903
	Film and television costs		$	5,200	$	4,983

Investments_Tables

Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Investment Summary	'
				June 30,		December 31,
	(in millions)			2014		2013
	Fair Value Method		$	2,387	$	4,345
	Equity Method:
		The Weather Channel		331		333
		Hulu		187		187
		Other		486		469
				1,004		989
	Cost Method:
		AirTouch		1,560		1,553
		Other		446		456
				2,006		2,009
	Total investments			5,397		7,343
	Less: Current investments			2,325		3,573
	Noncurrent investments		$	3,072	$	3,770
Investment Income (Loss), Net	'
	Investment Income (Loss), Net
			Three Months Ended				Six Months Ended
			30-Jun				30-Jun
	(in millions)		2014		2013		2014		2013
	Gains on sales and exchanges of investments, net		$	90	$	3	$	173	$	38
	Investment impairment losses			-19		-4		-24		-13
	Unrealized gains (losses) on securities underlying prepaid
		forward sale agreements		85		247		-28		852
	Mark to market adjustments on derivative component of prepaid
		forward sale agreements and indexed debt instruments		-85		-239		32		-841
	Interest and dividend income			28		26		56		56
	Other, net			21		-20		24		-7
	Investment income (loss), net		$	120	$	13	$	233	$	85
Prepaid Forward Sale Agreements	'
	Prepaid Forward Sale Agreements
			June 30,		December 31,
	(in millions)		2014		2013
	Assets:
		Fair value equity securities held as collateral	$	2,250	$	3,959
	Liabilities:
		Obligations under prepaid forward sale agreements	$	470	$	811
		Derivative component of prepaid forward sale agreements		1,586		2,800
	Total liabilities		$	2,056	$	3,611
NBCUniversal Media, LLC [Member]	'
Investment Summary	'
				June 30,		December 31,
	(in millions)			2014		2013
	Fair Value Method		$	19	$	11
	Equity Method:
		The Weather Channel		331		333
		Hulu		187		187
		Other		333		332
				851		852
	Cost Method			19		21
	Total investments			889		884
	Less: Current investments			8		-
	Noncurrent Investments		$	881	$	884

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Assets and Liabilities Measured on Recurring Basis	'
	Recurring Fair Value Measures
			Fair Value as of
			30-Jun-14								31-Dec-13
	(in millions)			Level 1		Level 2		Level 3		Total		Total
	Assets
	Trading securities		$	2,248	$	-	$	-	$	2,248	$	3,956
	Available-for-sale securities			9		119		10		138		389
	Interest rate swap agreements			-		108		-		108		110
	Other			-		78		1		79		81
	Total		$	2,257	$	305	$	11	$	2,573	$	4,536
	Liabilities
	Derivative component of prepaid forward sale agreements
		and indexed debt instruments	$	-	$	1,600	$	-	$	1,600	$	2,816
	Contractual obligation			-		-		788		788		747
	Contingent consideration			-		-		664		664		684
	Other			-		12		-		12		16
	Total		$	-	$	1,612	$	1,452	$	3,064	$	4,263
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	Changes in Contractual Obligation and Contingent Consideration
	(in millions)		Contractual Obligation		Contingent Consideration
	Balance, December 31, 2013	$	747	$	684
	Fair value adjustments		68		16
	Payments		-27		-36
	Balance, June 30, 2014	$	788	$	664
NBCUniversal Media, LLC [Member]	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
	Changes in Contractual Obligation
	(in millions)		Contractual Obligation
	Balance, December 31, 2013	$	747
	Fair value adjustments		68
	Payments		-27
	Balance, June 30, 2014	$	788

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Recognized Share-Based Compensation Expense	'
	Recognized Share-Based Compensation Expense
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)	2014		2013			2014		2013
	Stock options	$	47	$	36		$	83	$	68
	Restricted share units		68		48			116		86
	Employee stock purchase plans		7		5			13		11
	Total	$	122	$	89		$	212	$	165
NBCUniversal Media, LLC [Member]	'
Recognized Share-Based Compensation Expense	'
	Recognized Share-Based Compensation Expense
		Three Months Ended				Six Months Ended
		30-Jun				30-Jun
	(in millions)	2014		2013		2014		2013
	Stock options	$	6	$	4	$	9	$	7
	Restricted share units		24		12		37		19
	Employee stock purchase plans		2		1		4		3
	Total	$	32	$	17	$	50	$	29

Supplemental_Financial_Informa1

Supplemental Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables	'
	Receivables
		June 30,		December 31,
	(in millions)	2014		2013
	Receivables, gross	$	6,749	$	6,972
	Less: Allowance for returns and customer incentives		290		375
	Less: Allowance for doubtful accounts		227		221
	Receivables, net	$	6,232	$	6,376
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (Loss)
			June 30,		June 30,
	(in millions)		2014		2013
	Unrealized gains (losses) on marketable securities		$	4	$	277
	Deferred gains (losses) on cash flow hedges			-63		-54
	Unrecognized gains (losses) on employee benefit obligations			70		-107
	Cumulative translation adjustments			-25		-39
	Accumulated other comprehensive income (loss), net of deferred taxes		$	-14	$	77
Schedule Of Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities	'
	Net Cash Provided by Operating Activities
					Six Months Ended
					30-Jun
	(in millions)				2014		2013
	Net income				$	3,963	$	3,389
	Adjustments to reconcile net income to net cash provided by operating activities:
		Depreciation and amortization				3,970		3,957
		Share-based compensation				266		213
		Noncash interest expense (income), net				87		81
		Equity in net (income) losses of investees, net				-54		-34
		Cash received from investees				50		72
		Net (gain) loss on investment activity and other				-113		-91
		Deferred income taxes				-22		87
	Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
		Current and noncurrent receivables, net				60		58
		Film and television costs, net(a)				-28		750
		Accounts payable and accrued expenses related to trade creditors				-168		-87
		Other operating assets and liabilities				-464		-710
	Net cash provided by operating activities				$	7,547	$	7,685
Cash Payments For Interest and Income Taxes	'
	Cash Payments for Interest and Income Taxes
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)		2014		2013			2014		2013
	Interest	$	541	$	515		$	1,164	$	1,132
	Income taxes	$	1,718	$	1,761		$	1,904	$	2,222
NBCUniversal Media, LLC [Member]	'
Receivables	'
	Receivables
		June 30,		December 31,
	(in millions)	2014		2013
	Receivables, gross	$	5,022	$	5,348
	Less: Allowance for returns and customer incentives		288		372
	Less: Allowance for doubtful accounts		66		65
	Receivables, net	$	4,668	$	4,911
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (Loss)
			June 30,		June 30,
	(in millions)		2014		2013
	Unrealized gains (losses) on marketable securities		$	5	$	-
	Deferred gains (losses) on cash flow hedges			-7		-
	Unrecognized gains (losses) on employee benefit obligations			45		-51
	Cumulative translation adjustments			-38		-60
	Accumulated other comprehensive income (loss), net of deferred taxes		$	5	$	-111
Schedule Of Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities	'
	Net Cash Provided by Operating Activities
					Six Months Ended
					30-Jun
	(in millions)				2014		2013
	Net income				$	1,583	$	1,041
	Adjustments to reconcile net income to net cash provided by operating activities:
		Depreciation and amortization				735		693
		Share-based compensation				-		7
		Equity in net (income) losses of investees, net				-29		-27
		Cash received from investees				35		58
		Net (gain) loss on investment activity and other				45		61
		Deferred income taxes				44		2
	Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
		Current and noncurrent receivables, net				154		26
		Film and television costs, net(a)				-40		726
		Accounts payable and accrued expenses related to trade creditors				-280		-198
		Other operating assets and liabilities				-458		113
	Net cash provided by operating activities				$	1,789	$	2,502
Cash Payments For Interest and Income Taxes	'
	Cash Payments for Interest and Income Taxes
		Three Months Ended					Six Months Ended
		30-Jun					30-Jun
	(in millions)		2014		2013			2014		2013
	Interest	$	220	$	204		$	256	$	224
	Income taxes	$	57	$	47		$	110	$	102

Financial_Data_by_Business_Seg1

Financial Data by Business Segment (Tables)	6 Months Ended
	Jun. 30, 2014
Financial Data by Business Segment	'
			Three Months Ended June 30, 2014
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	11,029	$	4,564	$	1,604	$	2,960	$	1,493
	NBCUniversal
		Cable Networks(b)		2,476		914		180		734		8
		Broadcast Television		1,816		240		27		213		26
		Filmed Entertainment(b)		1,176		195		5		190		3
		Theme Parks		615		244		73		171		158
		Headquarters and Other(c)		4		-159		85		-244		103
		Eliminations(d)		-71		-		-		-		-
	NBCUniversal			6,016		1,434		370		1,064		298
	Corporate and Other			172		-182		26		-208		7
	Eliminations(d)			-373		-12		-		-12		-
	Comcast Consolidated		$	16,844	$	5,804	$	2,000	$	3,804	$	1,798
			Three Months Ended June 30, 2013
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	10,467	$	4,335	$	1,623	$	2,712	$	1,240
	NBCUniversal
		Cable Networks(b)		2,413		860		182		678		24
		Broadcast Television		1,732		206		26		180		9
		Filmed Entertainment(b)		1,388		33		3		30		1
		Theme Parks		546		231		73		158		147
		Headquarters and Other(c)		9		-137		65		-202		79
		Eliminations(d)		-93		-2		-		-2		-
	NBCUniversal			5,995		1,191		349		842		260
	Corporate and Other			136		-119		17		-136		6
	Eliminations(d)			-328		18		1		17		-
	Comcast Consolidated		$	16,270	$	5,425	$	1,990	$	3,435	$	1,506
			Six Months Ended June 30, 2014
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	21,786	$	8,964	$	3,188	$	5,776	$	2,638
	NBCUniversal
		Cable Networks(b)		4,981		1,809		369		1,440		19
		Broadcast Television		4,437		362		54		308		37
		Filmed Entertainment(b)		2,527		483		10		473		4
		Theme Parks		1,102		414		142		272		302
		Headquarters and Other(c)		6		-322		160		-482		227
		Eliminations(d)		-161		-1		-		-1		-
	NBCUniversal			12,892		2,745		735		2,010		589
	Corporate and Other			346		-335		47		-382		19
	Eliminations(d)			-772		-32		-		-32		-
	Comcast Consolidated		$	34,252	$	11,342	$	3,970	$	7,372	$	3,246
			Six Months Ended June 30, 2013
	(in millions)			Revenue(e)		Operating Income (Loss) Before Depreciation and Amortization(f)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Communications(a)		$	20,684	$	8,554	$	3,231	$	5,323	$	2,334
	NBCUniversal
		Cable Networks(b)		4,638		1,719		366		1,353		48
		Broadcast Television		3,249		171		51		120		17
		Filmed Entertainment(b)		2,604		102		7		95		3
		Theme Parks		1,008		404		145		259		285
		Headquarters and Other(c)		18		-249		124		-373		170
		Eliminations(d)		-182		-3		-		-3		-
	NBCUniversal			11,335		2,144		693		1,451		523
	Corporate and Other			298		-202		32		-234		10
	Eliminations(d)			-737		-37		1		-38		-
	Comcast Consolidated		$	31,580	$	10,459	$	3,957	$	6,502	$	2,867
			Three Months Ended				Six Months Ended
			30-Jun				30-Jun
			2014		2013		2014		2013
	Residential:
		Video	47.5	%	49.4	%	47.8	%	49.7	%
		High-speed Internet	25.6	%	24.5	%	25.6	%	24.6	%
		Voice	8.4	%	8.7	%	8.5	%	8.8	%
Business services		8.7	%	7.5	%	8.6	%	7.4	%
Advertising		5.4	%	5.3	%	5.1	%	5.1	%
Other		4.4	%	4.6	%	4.4	%	4.4	%
Total		100	%	100	%	100	%	100	%
NBCUniversal Media, LLC [Member]	'
Financial Data by Business Segment	'
			Three Months Ended June 30, 2014
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
		Cable Networks(a)	$	2,476	$	914	$	180	$	734	$	8
		Broadcast Television		1,816		240		27		213		26
		Filmed Entertainment(a)		1,176		195		5		190		3
		Theme Parks		615		244		73		171		158
		Headquarters and Other(b)		4		-159		85		-244		103
		Eliminations(c)		-71		-		-		-		-
	Total		$	6,016	$	1,434	$	370	$	1,064	$	298
			Three Months Ended June 30, 2013
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
		Cable Networks(a)	$	2,413	$	860	$	182	$	678	$	24
		Broadcast Television		1,732		206		26		180		9
		Filmed Entertainment(a)		1,388		33		3		30		1
		Theme Parks		546		231		73		158		147
		Headquarters and Other(b)		9		-137		65		-202		79
		Eliminations(c)		-93		-2		-		-2		-
	Total		$	5,995	$	1,191	$	349	$	842	$	260
			Six Months Ended June 30, 2014
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Networks(a)		$	4,981	$	1,809	$	369	$	1,440	$	19
	Broadcast Television			4,437		362		54		308		37
	Filmed Entertainment(a)			2,527		483		10		473		4
	Theme Parks			1,102		414		142		272		302
	Headquarters and Other(b)			6		-322		160		-482		227
	Eliminations(c)			-161		-1		-		-1		-
	Total		$	12,892	$	2,745	$	735	$	2,010	$	589
			Six Months Ended June 30, 2013
	(in millions)			Revenue(d)		Operating Income (Loss) Before Depreciation and Amortization(e)		Depreciation and Amortization		Operating Income (Loss)		Capital Expenditures
	Cable Networks(a)		$	4,638	$	1,719	$	366	$	1,353	$	48
	Broadcast Television			3,249		171		51		120		17
	Filmed Entertainment(a)			2,604		102		7		95		3
	Theme Parks			1,008		404		145		259		285
	Headquarters and Other(b)			18		-249		124		-373		170
	Eliminations(c)			-182		-3		-		-3		-
	Total		$	11,335	$	2,144	$	693	$	1,451	$	523

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Condensed Consolidating Financial Information [Abstract]	'
Condensed Consolidating Financial Statements	'
	Condensed Consolidating Balance Sheet
	30-Jun-14
	(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
	Assets
		Cash and cash equivalents	$	-	$	-	$	-	$	-	$	307	$	1,222	$	-	$	1,529
		Investments		-		-		-		-		8		2,317		-		2,325
		Receivables, net		-		-		-		-		-		6,232		-		6,232
		Programming rights		-		-		-		-		-		905		-		905
		Other current assets		227		-		-		-		35		1,519		-		1,781
	Total current assets			227		-		-		-		350		12,195		-		12,772
	Film and television costs			-		-		-		-		-		5,208		-		5,208
	Investments			21		-		-		-		374		2,677		-		3,072
	Investments in and amounts due from subsidiaries eliminated upon consolidation			81,329		100,649		107,347		57,057		40,511		91,705		-478,598		-
	Property and equipment, net			209		-		-		-		-		29,761		-		29,970
	Franchise rights			-		-		-		-		-		59,364		-		59,364
	Goodwill			-		-		-		-		-		27,323		-		27,323
	Other intangible assets, net			10		-		-		-		-		17,223		-		17,233
	Other noncurrent assets, net			1,179		148		-		-		97		2,065		-972		2,517
	Total assets		$	82,975	$	100,797	$	107,347	$	57,057	$	41,332	$	247,521	$	-479,570	$	157,459
	Liabilities and Equity
		Accounts payable and accrued expenses related to  trade creditors	$	11	$	-	$	-	$	-	$	-	$	5,421	$	-	$	5,432
		Accrued participations and residuals		-		-		-		-		-		1,364		-		1,364
		Accrued expenses and other current liabilities		1,501		283		193		47		322		5,286		-		7,632
		Current portion of long-term debt		900		-		-		-		1,011		1,036		-		2,947
	Total current liabilities			2,412		283		193		47		1,333		13,107		-		17,375
	Long-term debt, less current portion			26,489		132		1,827		1,502		9,220		4,432		-		43,602
	Deferred income taxes			-		738		-		-		59		31,885		-828		31,854
	Other noncurrent liabilities			2,103		-		-		-		981		8,301		-144		11,241
	Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		1,055		-		1,055
	Equity:
		Common stock		30		-		-		-		-		-		-		30
		Other shareholders’ equity		51,941		99,644		105,327		55,508		29,739		188,380		-478,598		51,941
	Total Comcast Corporation
		shareholders’ equity		51,971		99,644		105,327		55,508		29,739		188,380		-478,598		51,971
	Noncontrolling interests			-		-		-		-		-		361		-		361
	Total equity			51,971		99,644		105,327		55,508		29,739		188,741		-478,598		52,332
	Total liabilities and equity		$	82,975	$	100,797	$	107,347	$	57,057	$	41,332	$	247,521	$	-479,570	$	157,459
	Condensed Consolidating Balance Sheet
	31-Dec-13
	(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
	Assets
		Cash and cash equivalents	$	-	$	-	$	-	$	-	$	336	$	1,382	$	-	$	1,718
		Investments		-		-		-		-		-		3,573		-		3,573
		Receivables, net		-		-		-		-		-		6,376		-		6,376
		Programming rights		-		-		-		-		-		928		-		928
		Other current assets		237		-		-		-		35		1,208		-		1,480
	Total current assets			237		-		-		-		371		13,467		-		14,075
	Film and television costs			-		-		-		-		-		4,994		-		4,994
	Investments			11		-		-		-		374		3,385		-		3,770
	Investments in and amounts due from subsidiaries eliminated upon consolidation			79,956		97,429		102,673		54,724		40,644		85,164		-460,590		-
	Property and equipment, net			220		-		-		-		-		29,620		-		29,840
	Franchise rights			-		-		-		-		-		59,364		-		59,364
	Goodwill			-		-		-		-		-		27,098		-		27,098
	Other intangible assets, net			11		-		-		-		-		17,318		-		17,329
	Other noncurrent assets, net			1,078		145		-		-		103		1,899		-882		2,343
	Total assets		$	81,513	$	97,574	$	102,673	$	54,724	$	41,492	$	242,309	$	-461,472	$	158,813
	Liabilities and Equity
		Accounts payable and accrued expenses related to trade creditors	$	8	$	-	$	-	$	-	$	-	$	5,520	$	-	$	5,528
		Accrued participations and residuals		-		-		-		-		-		1,239		-		1,239
		Accrued expenses and other current liabilities		1,371		266		180		47		323		6,678		-		8,865
		Current portion of long-term debt		2,351		-		-		-		903		26		-		3,280
	Total current liabilities			3,730		266		180		47		1,226		13,463		-		18,912
	Long-term debt, less current portion			25,170		132		1,827		1,505		10,236		5,697		-		44,567
Deferred income taxes			-		777		-		-		59		31,840		-741		31,935
Other noncurrent liabilities			1,919		-		-		-		931		8,675		-141		11,384
Redeemable noncontrolling interests and redeemable subsidiary preferred stock			-		-		-		-		-		957		-		957
Equity:
	Common stock		30		-		-		-		-		-		-		30
	Other shareholders’ equity		50,664		96,399		100,666		53,172		29,040		181,313		-460,590		50,664
Total Comcast Corporation shareholders’ equity			50,694		96,399		100,666		53,172		29,040		181,313		-460,590		50,694
Noncontrolling interests			-		-		-		-		-		364		-		364
Total equity			50,694		96,399		100,666		53,172		29,040		181,677		-460,590		51,058
Total liabilities and equity		$	81,513	$	97,574	$	102,673	$	54,724	$	41,492	$	242,309	$	-461,472	$	158,813
Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities		$	-147	$	12	$	-43	$	-41	$	-711	$	8,477	$	-	$	7,547
Investing Activities
	Net transactions with affiliates		2,674		-12		43		41		1,583		-4,329		-		-
	Capital expenditures		-4		-		-		-		-		-3,242		-		-3,246
	Cash paid for intangible assets		-2		-		-		-		-		-475		-		-477
	Acquisitions and construction of real estate properties		-		-		-		-		-		-10		-		-10
	Acquisitions, net of cash acquired		-		-		-		-		-		-406		-		-406
	Proceeds from sales of businesses and investments		-		-		-		-		2		479		-		481
	Return of capital from investees		-		-		-		-		-		6		-		6
	Purchases of investments		-10		-		-		-		-6		-61		-		-77
	Other		-		-		-		-		4		-163		-		-159
Net cash provided by (used in) investing activities			2,658		-12		43		41		1,583		-8,201		-		-3,888
Financing Activities
	Proceeds from (repayments of) short-term borrowings, net		-1,350		-		-		-		-		1,007		-		-343
	Proceeds from borrowings		2,184		-		-		-		-		3		-		2,187
	Repurchases and repayments of debt		-1,000		-		-		-		-901		-1,262		-		-3,163
	Repurchases and retirements of common stock		-1,500		-		-		-		-		-		-		-1,500
	Dividends paid		-1,092		-		-		-		-		-		-		-1,092
	Issuances of common stock		29		-		-		-		-		-		-		29
	Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		-117		-		-117
	Other		218		-		-		-		-		-67		-		151
Net cash provided by (used in) financing activities			-2,511		-		-		-		-901		-436		-		-3,848
Increase (decrease) in cash and cash equivalents			-		-		-		-		-29		-160		-		-189
Cash and cash equivalents, beginning of period			-		-		-		-		336		1,382		-		1,718
Cash and cash equivalents, end of period		$	-	$	-	$	-	$	-	$	307	$	1,222	$	-	$	1,529
Condensed Consolidating Statement of Cash Flows
For the Six Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non-Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Net cash provided by (used in) operating activities		$	-181	$	-8	$	-120	$	-47	$	-582	$	8,623	$	-	$	7,685
Investing Activities
	Net transactions with affiliates		-1,301		8		2,217		47		-984		13		-		-
	Capital expenditures		-2		-		-		-		-		-2,865		-		-2,867
	Cash paid for intangible assets		-1		-		-		-		-		-443		-		-444
	Acquisitions and construction of real estate properties		-		-		-		-		-		-1,311		-		-1,311
	Acquisitions, net of cash acquired		-		-		-		-		-		-22		-		-22
	Proceeds from sales of businesses and investments		-		-		-		-		-		91		-		91
	Return of capital from investees		-		-		-		-		128		18		-		146
	Purchases of investments		-8		-		-		-		-2		-631		-		-641
	Other		-		-		-		-		-10		98		-		88
Net cash provided by (used in) investing activities			-1,312		8		2,217		47		-868		-5,052		-		-4,960
Financing Activities
	Proceeds from (repayments of) short-term borrowings, net		350		-		-		-		-		-2		-		348
	Proceeds from borrowings		2,933		-		-		-		-		-		-		2,933
	Repurchases and repayments of debt		-		-		-2,097		-		-88		-10		-		-2,195
	Repurchases and retirements of common stock		-1,000		-		-		-		-		-		-		-1,000
	Dividends paid		-942		-		-		-		-		-		-		-942
	Issuances of common stock		24		-		-		-		-		-		-		24
	Purchase of NBCUniversal noncontrolling common equity interest		-		-		-		-		-3,200		-7,561		-		-10,761
	Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock		-		-		-		-		-		-116		-		-116
	Settlement of Station Venture liability		-		-		-		-		-		-602		-		-602
	Other		128		-		-		-		-40		-64		-		24
Net cash provided by (used in) financing activities			1,493		-		-2,097		-		-3,328		-8,355		-		-12,287
Increase (decrease) in cash and cash equivalents			-		-		-		-		-4,778		-4,784		-		-9,562
Cash and cash equivalents, beginning of period			-		-		-		-		5,129		5,822		-		10,951
Cash and cash equivalents, end of period		$	-	$	-	$	-	$	-	$	351	$	1,038	$	-	$	1,389
Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,844	$	-	$	16,844
	Management fee revenue		237		-		231		145		-		-		-613		-
			237		-		231		145		-		16,844		-613		16,844
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,874		-		4,874
	Other operating and administrative		181		-		231		145		237		4,743		-613		4,924
	Advertising, marketing and promotion		-		-		-		-		-		1,242		-		1,242
	Depreciation		8		-		-		-		-		1,591		-		1,599
	Amortization		2		-		-		-		-		399		-		401
			191		-		231		145		237		12,849		-613		13,040
Operating income (loss)			46		-		-		-		-237		3,995		-		3,804
Other Income (Expense):
	Interest expense		-400		-3		-44		-30		-125		-46		-		-648
	Investment income (loss), net		1		-		-		-		4		115		-		120
	Equity in net income
	(losses) of investees, net		2,222		1,908		1,774		1,554		1,171		836		-9,443		22
	Other income (expense), net		-		-		-		-		7		-46		-		-39
			1,823		1,905		1,730		1,524		1,057		859		-9,443		-545
Income (loss) before income taxes			1,869		1,905		1,730		1,524		820		4,854		-9,443		3,259
Income tax (expense) benefit			123		1		15		11		-6		-1,378		-		-1,234
Net income (loss)			1,992		1,906		1,745		1,535		814		3,476		-9,443		2,025
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-33		-		-33
Net income (loss) attributable
	to Comcast Corporation	$	1,992	$	1,906	$	1,745	$	1,535	$	814	$	3,443	$	-9,443	$	1,992
Comprehensive income (loss)
	attributable to Comcast Corporation	$	1,945	$	1,912	$	1,744	$	1,535	$	832	$	3,401	$	-9,424	$	1,945
Condensed Consolidating Statement of Income
For the Three Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	16,270	$	-	$	16,270
	Management fee revenue		225		-		219		137		-		-		-581		-
			225		-		219		137		-		16,270		-581		16,270
Costs and Expenses:
	Programming and production		-		-		-		-		-		4,968		-		4,968
	Other operating and administrative		101		-		219		137		205		4,489		-581		4,570
	Advertising, marketing and promotion		-		-		-		-		-		1,307		-		1,307
	Depreciation		8		-		-		-		-		1,575		-		1,583
	Amortization		2		-		-		-		-		405		-		407
			111		-		219		137		205		12,744		-581		12,835
Operating income (loss)			114		-		-		-		-205		3,526		-		3,435
Other Income (Expense):
	Interest expense		-383		-2		-46		-33		-123		-49		-		-636
	Investment income (loss), net		1		6		-		-		5		1		-		13
	Equity in net income (losses) of
	investees, net		1,910		1,909		1,835		1,349		951		646		-8,577		23
	Other income (expense), net		-1		-		2		-		-		-44		-		-43
			1,527		1,913		1,791		1,316		833		554		-8,577		-643
Income (loss) before income taxes			1,641		1,913		1,791		1,316		628		4,080		-8,577		2,792
Income tax (expense) benefit			93		-1		16		12		-5		-1,163		-		-1,048
Net income (loss)			1,734		1,912		1,807		1,328		623		2,917		-8,577		1,744
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-10		-		-10
Net income (loss)
	attributable to Comcast Corporation	$	1,734	$	1,912	$	1,807	$	1,328	$	623	$	2,907	$	-8,577	$	1,734
Comprehensive
	income (loss) attributable to Comcast Corporation	$	1,822	$	1,905	$	1,808	$	1,328	$	599	$	3,007	$	-8,647	$	1,822
Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2014
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	34,252	$	-	$	34,252
	Management fee revenue		467		-		454		286		-		-		-1,207		-
			467		-		454		286		-		34,252		-1,207		34,252
Costs and Expenses:
	Programming and production		-		-		-		-		-		10,782		-		10,782
	Other operating and administrative		274		-		454		286		494		9,375		-1,207		9,676
	Advertising, marketing and promotion		-		-		-		-		-		2,452		-		2,452
	Depreciation		15		-		-		-		-		3,153		-		3,168
	Amortization		3		-		-		-		-		799		-		802
			292		-		454		286		494		26,561		-1,207		26,880
Operating income (loss)			175		-		-		-		-494		7,691		-		7,372
Other Income (Expense):
	Interest expense		-787		-6		-89		-59		-249		-100		-		-1,290
	Investment income (loss), net		2		3		-		-		5		223		-		233
	Equity in net income
	(losses) of investees, net		4,260		4,175		3,939		3,065		2,242		1,550		-19,177		54
	Other income (expense), net		-		-		-		-		3		-57		-		-54
			3,475		4,172		3,850		3,006		2,001		1,616		-19,177		-1,057
Income (loss) before income taxes			3,650		4,172		3,850		3,006		1,507		9,307		-19,177		6,315
Income tax (expense) benefit			213		1		31		21		-11		-2,607		-		-2,352
Net income (loss)			3,863		4,173		3,881		3,027		1,496		6,700		-19,177		3,963
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-100		-		-100
Net income (loss) attributable
	to Comcast Corporation	$	3,863	$	4,173	$	3,881	$	3,027	$	1,496	$	6,600	$	-19,177	$	3,863
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,793	$	4,181	$	3,882	$	3,028	$	1,517	$	6,535	$	-19,143	$	3,793
Condensed Consolidating Statement of Income
For the Six Months Ended June 30, 2013
(in millions)			Comcast Parent		Comcast Holdings		CCCL Parent		Combined CCHMO Parents		NBCUniversal Media Parent		Non- Guarantor Subsidiaries		Elimination and Consolidation Adjustments		Consolidated Comcast Corporation
Revenue:
	Service revenue	$	-	$	-	$	-	$	-	$	-	$	31,580	$	-	$	31,580
	Management fee revenue		443		-		431		270		-		-		-1,144		-
			443		-		431		270		-		31,580		-1,144		31,580
Costs and Expenses:
	Programming and production		-		-		-		-		-		9,631		-		9,631
	Other operating and administrative		199		-		431		270		430		8,850		-1,144		9,036
	Advertising, marketing and promotion		-		-		-		-		-		2,454		-		2,454
	Depreciation		15		-		-		-		-		3,134		-		3,149
	Amortization		3		-		-		-		-		805		-		808
			217		-		431		270		430		24,874		-1,144		25,078
Operating income (loss)			226		-		-		-		-430		6,706		-		6,502
Other Income (Expense):
	Interest expense		-759		-5		-124		-66		-243		-92		-		-1,289
	Investment income (loss), net		2		3		-		-		1		79		-		85
	Equity in net income
	(losses) of investees, net		3,518		3,651		3,598		2,611		1,660		1,012		-16,016		34
	Other income (expense), net		-2		-		2		-		-		30		-		30
			2,759		3,649		3,476		2,545		1,418		1,029		-16,016		-1,140
Income (loss) before income taxes			2,985		3,649		3,476		2,545		988		7,735		-16,016		5,362
Income tax (expense) benefit			186		1		43		23		-10		-2,216		-		-1,973
Net income (loss)			3,171		3,650		3,519		2,568		978		5,519		-16,016		3,389
Net (income) loss attributable
	to noncontrolling interests and redeemable subsidiary preferred stock		-		-		-		-		-		-218		-		-218
Net income (loss) attributable
	to Comcast Corporation	$	3,171	$	3,650	$	3,519	$	2,568	$	978	$	5,301	$	-16,016	$	3,171
Comprehensive income (loss)
	attributable to Comcast Corporation	$	3,259	$	3,643	$	3,522	$	2,568	$	932	$	5,414	$	-16,079	$	3,259

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share	'	'	'	'
Net income attributable to Parent	$1,992	$1,734	$3,863	$3,171
Basic shares attributable to Comcast Corporation shareholders	2,594	2,631	2,598	2,633
Assumed exercise or issuance of shares relating to stock plans	34	35	38	39
Diluted shares attributable to Comcast Corporation shareholders	2,628	2,666	2,636	2,672
Basic earnings per common share attributable to Comcast Corporation shareholders	$0.77	$0.66	$1.49	$1.20
Diluted earnings per common share attributable to Comcast Corporation shareholders	$0.76	$0.65	$1.47	$1.19
Excluded shares from diluted EPS because their inclusion would have an antidilutive effect	16	18	9	10

Significant_Transactions_Narra

Significant Transactions (Narrative) (Details)	Jun. 30, 2014
Significant Transactions [Line Items]	'
Percentage Of Voting Interests To Be Acquired	100.00%
Company Shares Exchanged For Each Acquiree Share	2.875
Acquiree Stockholders Percentage Ownership In Parent Company	23.00%
Merger Agreement Undertaking Number Of Divested Customers [Member]	'
Significant Transactions [Line Items]	'
Number of customers	3,000,000
Divestiture Transactions Net Disposition Of Customers [Member]	'
Significant Transactions [Line Items]	'
Number of customers	3,900,000
Divestiture Transactions Customers To Be Spun Off In SpinCo [Member]	'
Significant Transactions [Line Items]	'
Number of customers	2,500,000
Divestiture Transactions Like Kind Divestiture Of Time Warner Cable Customers [Member]	'
Significant Transactions [Line Items]	'
Number of customers	1,500,000
Divestiture Transactions Like Kind Receipt Of Charter Communications Customers [Member]	'
Significant Transactions [Line Items]	'
Number of customers	1,700,000
Divestiture Transactions Sale Of Time Warner Cable Customers Member [Member]	'
Significant Transactions [Line Items]	'
Number of customers	1,500,000
Comcast Corporate Shareholders [Member]	'
Significant Transactions [Line Items]	'
Ownership Percentage In New Company	67.00%
New Charter [Member]	'
Significant Transactions [Line Items]	'
Ownership Percentage In New Company	33.00%

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014
			NBCUniversal Media, LLC [Member]	NBCUniversal Media, LLC [Member]	Nbcuniversal Holdings Preferred Stock [Member]	Carrying Value Of Related Party Contractual Obligation [Member]
					NBCUniversal Media, LLC [Member]	NBCUniversal Media, LLC [Member]
Preferred stock liquidition preference value	'	'	'	'	$9,400,000,000	'
Revolving Credit Agreement Capacity	'	'	3,000,000,000	'	'	'
Preferred stock dividend rate percentage	'	'	'	'	8.25%	'
Borrowing margin for LIBOR based borrowings	'	'	1.00%	'	'	'
Other noncurrent liabilities	$11,241,000,000	$11,384,000,000	$3,444,000,000	$3,412,000,000	'	$383,000,000

Related_Party_Transactions_Con

Related Party Transactions - Consolidated Balance Sheet (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Receivables, net	$6,232	$6,376
Accounts payable and accrued expenses related to trade creditors	5,432	5,528
Accrued expenses and other current liabilities	6,785	7,967
Other noncurrent liabilities	11,241	11,384
NBCUniversal Media, LLC [Member]	'	'
Receivables, net	4,668	4,911
Accounts payable and accrued expenses related to trade creditors	1,251	1,583
Accrued expenses and other current liabilities	1,187	1,465
Note payable to Comcast	1,532	799
Other noncurrent liabilities	3,444	3,412
Transactions With Comcast And Consolidated Subsidiaries [Member] | NBCUniversal Media, LLC [Member]	'	'
Receivables, net	252	228
Accounts payable and accrued expenses related to trade creditors	40	56
Accrued expenses and other current liabilities	11	37
Note payable to Comcast	1,532	799
Other noncurrent liabilities	$383	$383

Related_Party_Transactions_Con1

Related Party Transactions - Consolidated Statement of Income (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$16,844,000,000	$16,270,000,000	$34,252,000,000	$31,580,000,000
NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	6,016,000,000	5,995,000,000	12,892,000,000	11,335,000,000
Transactions With Comcast And Consolidated Subsidiaries [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	331,000,000	302,000,000	685,000,000	654,000,000
Operating costs and expenses	-40,000,000	-35,000,000	-64,000,000	-97,000,000
Other income (expense)	($13,000,000)	'	($22,000,000)	'

Film_and_Television_Costs_Film

Film and Television Costs (Film and Television Costs)(Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Film And Television Costs [Line Items]	'	'
Programming rights, less amortization	$2,089	$2,039
Total film costs, television costs and programming rights	6,113	5,922
Less: Current portion of programming rights	905	928
Film and television costs	5,208	4,994
NBCUniversal Media, LLC [Member]	'	'
Film And Television Costs [Line Items]	'	'
Programming rights, less amortization	2,065	2,003
Total film costs, television costs and programming rights	6,089	5,886
Less: Current portion of programming rights	889	903
Film and television costs	5,200	4,983
Film Costs [Member]	'	'
Film And Television Costs [Line Items]	'	'
Released, less amortization	1,356	1,630
Completed, not released	65	70
In production and in development	1,077	658
Total film costs	2,498	2,358
Film Costs [Member] | NBCUniversal Media, LLC [Member]	'	'
Film And Television Costs [Line Items]	'	'
Released, less amortization	1,356	1,630
Completed, not released	65	70
In production and in development	1,077	658
Total film costs	2,498	2,358
Television Costs [Member]	'	'
Film And Television Costs [Line Items]	'	'
Released, less amortization	1,165	1,155
In production and in development	361	370
Total television costs	1,526	1,525
Television Costs [Member] | NBCUniversal Media, LLC [Member]	'	'
Film And Television Costs [Line Items]	'	'
Released, less amortization	1,165	1,155
In production and in development	361	370
Total television costs	$1,526	$1,525

Investments_Details

Investments (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair value method	$2,387	$4,345
Equity method	1,004	989
Cost method	2,006	2,009
Total Investments	5,397	7,343
Less: Current investments	2,325	3,573
Noncurrent investments	3,072	3,770
NBCUniversal Media, LLC [Member]	'	'
Fair value method	19	11
Equity method	851	852
Cost method	19	21
Total Investments	889	884
Less: Current investments	8	'
Noncurrent investments	881	884
Other Equity Method Investments [Member]	'	'
Equity method	486	469
Other Equity Method Investments [Member] | NBCUniversal Media, LLC [Member]	'	'
Equity method	333	332
Air Touch [Member]	'	'
Cost method	1,560	1,553
Other Cost Method Investment [Member]	'	'
Cost method	446	456
The Weather Channel [Member]	'	'
Equity method	331	333
The Weather Channel [Member] | NBCUniversal Media, LLC [Member]	'	'
Equity method	331	333
Hulu [Member]	'	'
Equity method	187	187
Hulu [Member] | NBCUniversal Media, LLC [Member]	'	'
Equity method	$187	$187

Investments_Investment_Income_

Investments (Investment Income (Loss), Net) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Gains on sales and exchanges of investments, net	$90	$3	$173	$38
Investment impairment losses	-19	-4	-24	-13
Unrealized gains (losses) on securities underlying prepaid forward sale agreements	85	247	-28	852
Mark to market adjustments on derivative component of prepaid forward sale agreements and indexed debt instruments	-85	-239	32	-841
Interest and dividend income	28	26	56	56
Other, net	21	-20	24	-7
Investment income (loss), net	120	13	233	85
NBCUniversal Media, LLC [Member]	'	'	'	'
Investment income (loss), net	$9	$5	$15	$8

Investments_Fair_Value_Method_

Investments (Fair Value Method Investments) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Fair value equity securities held as collateral	$2,250,000,000	$3,959,000,000
Obligations under prepaid forward sale agreements	470,000,000	811,000,000
Derivative component of prepaid forward sale agreements	1,586,000,000	2,800,000,000
Total liabilities associated with prepaid forward sale agreements	2,056,000,000	3,611,000,000
Prepaid forward sale obligations fair value	2,100,000,000	'
Equity securities held as collateral under our prepaid forward sale agreements acquired during the period	$1,500,000,000	'

Investments_Cost_Method_Invest

Investments (Cost Method Investments) (Details) (Air Touch [Member], USD $)	Jun. 30, 2014
Air Touch [Member]	'
Fair value of AirTouch preferred stock related to redeemable preferred shares	$1,700,000,000
Fair value of redeemable preferred stock	$1,700,000,000

LongTerm_Debt_Narrative_Detail

Long-Term Debt (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Total debt	$46,500,000,000	'
Long-term Debt, Fair Value	52,600,000,000	'
Amounts available under revolving credit facilities	6,300,000,000	'
Repurchases and repayments of debt	3,163,000,000	2,195,000,000
Comcast ownership in cable holding company subsidiaries	100.00%	'
Proceeds from (repayments of) short-term borrowings, net	-343,000,000	348,000,000
NBCUniversal Media, LLC [Member]	'	'
Total debt	10,300,000,000	'
Long-term Debt, Fair Value	11,400,000,000	'
Comcast ownership in cable holding company subsidiaries	100.00%	'
Related Party Aggregate Principal Amount Senior Notes Not Subject To Guarantee	4,000,000,000	'
Related Party Credit Facility Not Subject To Guarantee	1,350,000,000	'
Related Party Liquidation Preference Preferred Stock Not Subject To Guarantee	725,000,000	'
NBCUniversal Enterprise Credit Facility	'	'
Debt Instrument, Maturity Date, Description	'March 2018	'
Credit facility borrowing capacity	1,350,000,000	'
Amounts available under revolving credit facilities	340,000,000	'
Repurchases and repayments of debt	1,250,000,000	'
NBCUniversal Enterprise Commercial Paper [Member]	'	'
Credit facility borrowing capacity	1,350,000,000	'
Commercial paper	1,000,000,000	'
Proceeds from (repayments of) short-term borrowings, net	990,000,000	'
Comcast And Comcast Cable Revolving Credit Facility [Member] | NBCUniversal Media, LLC [Member]	'	'
Debt Instrument, Maturity Date, Description	'2017	'
Guarantee Obligations Revolving Credit Facility	6,250,000,000	'
Comcast And Comcast Cable Debt Securities [Member] | NBCUniversal Media, LLC [Member]	'	'
Guarantee Obligations Current Principal Balance	30,700,000,000	'
Senior 3.60% Notes Due 2024 [Member]	'	'
Principal amount	1,200,000,000	'
Interest rate	3.60%	'
Debt Instrument, Maturity Date, Description	'2024	'
Senior 4.75% Notes Due 2044 [Member]	'	'
Principal amount	1,000,000,000	'
Interest rate	4.75%	'
Debt Instrument, Maturity Date, Description	'2044	'
Senior 5.3% Notes Due 2014 [Member]	'	'
Interest rate	5.30%	'
Debt Instrument, Maturity Date, Description	'2014	'
Repurchases and repayments of debt	1,000,000,000	'
Senior 2.1% Notes Due 2014 [Member]	'	'
Interest rate	2.10%	'
Debt Instrument, Maturity Date, Description	'April 2014	'
Repurchases and repayments of debt	900,000,000	'
Senior 2.1% Notes Due 2014 [Member] | NBCUniversal Media, LLC [Member]	'	'
Interest rate	2.10%	'
Debt Instrument, Maturity Date, Description	'April 2014	'
Repurchases and repayments of debt	$900,000,000	'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Trading securities	$2,248	$3,956
Available-for-sale Securities	138	389
Interest rate swap agreements	108	110
Other [assets]	79	81
Fair Value, Assets Measured on Recurring Basis, Total	2,573	4,536
Derivative component of prepaid forward sale agreements and indexed debt instruments	1,600	2,816
Contractual obligation	788	747
Contingent consideration	664	684
Other [liabilities]	12	16
Fair Value Liabilities Measured On Recurring Basis	3,064	4,263
Fair Value, Inputs, Level 1 [Member]	'	'
Trading securities	2,248	'
Available-for-sale Securities	9	'
Fair Value, Assets Measured on Recurring Basis, Total	2,257	'
Fair Value, Inputs, Level 2 [Member]	'	'
Available-for-sale Securities	119	'
Interest rate swap agreements	108	'
Other [assets]	78	'
Fair Value, Assets Measured on Recurring Basis, Total	305	'
Derivative component of prepaid forward sale agreements and indexed debt instruments	1,600	'
Other [liabilities]	12	'
Fair Value Liabilities Measured On Recurring Basis	1,612	'
Fair Value, Inputs, Level 3 [Member]	'	'
Available-for-sale Securities	10	'
Other [assets]	1	'
Fair Value, Assets Measured on Recurring Basis, Total	11	'
Contractual obligation	788	'
Contingent consideration	664	'
Fair Value Liabilities Measured On Recurring Basis	$1,452	'

Fair_Value_Disclosure_Rollforw

Fair Value Disclosure Rollforward (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
NBCUniversal Enterprise [Member]	'
Fair value of redeemable preferred stock	$759
Contractual Obligation [Member]	'
Beginning balance	747
Fair value adjustments	68
Payments	-27
Ending balance	788
Contractual Obligation [Member] | NBCUniversal Media, LLC [Member]	'
Beginning balance	747
Fair value adjustments	68
Payments	-27
Ending balance	788
Discount rate used to determine fair value, minimum	12.00%
Discount rate used to determine fair value, maximum	13.00%
Contingent Consideration [Member]	'
Beginning balance	684
Fair value adjustments	16
Payments	-36
Ending balance	$664
Contractual Obligation And Contingent Consideration Discount Rates [Member]	'
Discount rate used to determine fair value, minimum	5.00%
Discount rate used to determine fair value, maximum	13.00%

ShareBased_Compensation_Narrat

Share-Based Compensation (Narrative) (Details) (USD $)	6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014
Number of stock options granted	16.4
Number of restricted share units granted	5.4
Weighted average fair value of stock options granted	$11.09
Weighed average fair value of restricted share units granted	$46.57
Stock Options [Member]	'
Unrecognized pretax compensation expense on nonvested awards	$392
Restricted Share Units [Member]	'
Unrecognized pretax compensation expense on nonvested awards	$529

ShareBased_Compensation_Recogn

Share-Based Compensation (Recognized Share-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Recognized share-based compensation expense	$122	$89	$212	$165
NBCUniversal Media, LLC [Member]	'	'	'	'
Recognized share-based compensation expense	32	17	50	29
Stock Options [Member]	'	'	'	'
Recognized share-based compensation expense	47	36	83	68
Stock Options [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Recognized share-based compensation expense	6	4	9	7
Restricted Share Units [Member]	'	'	'	'
Recognized share-based compensation expense	68	48	116	86
Restricted Share Units [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Recognized share-based compensation expense	24	12	37	19
Employee Stock Purchase Plan [Member]	'	'	'	'
Recognized share-based compensation expense	7	5	13	11
Employee Stock Purchase Plan [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Recognized share-based compensation expense	$2	$1	$4	$3

Supplemental_Financial_Informa2

Supplemental Financial Information (Receivables)(Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Receivables, gross	$6,749	$6,972
Less: Allowance for returns and customer incentives	290	375
Less: Allowance for doubtful accounts	227	221
Receivables, net	6,232	6,376
NBCUniversal Media, LLC [Member]	'	'
Receivables, gross	5,022	5,348
Less: Allowance for returns and customer incentives	288	372
Less: Allowance for doubtful accounts	66	65
Receivables, net	$4,668	$4,911

Supplemental_Financial_Informa3

Supplemental Financial Information (Components of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
In Millions, unless otherwise specified
Unrealized gains (losses) on marketable securities	$4	'	$277
Deferred gains (losses) on cash flow hedges	-63	'	-54
Unrecognized gains (losses) on employee benefit obligations	70	'	-107
Cumulative translation adjustments	-25	'	-39
Accumulated other comprehensive income (loss), net of deferred taxes	-14	56	77
NBCUniversal Media, LLC [Member]	'	'	'
Unrealized gains (losses) on marketable securities	5	'	'
Deferred gains (losses) on cash flow hedges	-7	'	'
Unrecognized gains (losses) on employee benefit obligations	45	'	-51
Cumulative translation adjustments	-38	'	-60
Accumulated other comprehensive income (loss), net of deferred taxes	$5	($16)	($111)

Supplemental_Financial_Informa4

Supplemental Financial Information (Net Cash Provided by Operating Activities)(Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$2,025,000,000	$1,744,000,000	$3,963,000,000	$3,389,000,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'	'
Depreciation and amortization	2,000,000,000	1,990,000,000	3,970,000,000	3,957,000,000
Share-based compensation	'	'	266,000,000	213,000,000
Noncash interest expense (income), net	'	'	87,000,000	81,000,000
Equity in net (income) losses of investees, net	-22,000,000	-23,000,000	-54,000,000	-34,000,000
Cash received from investees	'	'	50,000,000	72,000,000
Net (gain) loss on investment activity and other	'	'	-113,000,000	-91,000,000
Deferred income taxes	'	'	-22,000,000	87,000,000
Current and noncurrent receivables, net	'	'	60,000,000	58,000,000
Film and television costs, net	'	'	-28,000,000	750,000,000
Accounts payable and accrued expenses related to trade creditors (cash flow)	'	'	-168,000,000	-87,000,000
Other operating assets and liabilities	'	'	-464,000,000	-710,000,000
Net cash provided by operating activities	'	'	7,547,000,000	7,685,000,000
Amortization of film and television costs	'	'	4,979,000,000	4,080,000,000
Additions to film and television costs	'	'	5,007,000,000	3,330,000,000
NBCUniversal Media, LLC [Member]	'	'	'	'
Net income	842,000,000	630,000,000	1,583,000,000	1,041,000,000
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'	'
Depreciation and amortization	370,000,000	349,000,000	735,000,000	693,000,000
Share-based compensation	'	'	'	7,000,000
Equity in net (income) losses of investees, net	-11,000,000	-16,000,000	-29,000,000	-27,000,000
Cash received from investees	'	'	35,000,000	58,000,000
Net (gain) loss on investment activity and other	'	'	45,000,000	61,000,000
Deferred income taxes	'	'	44,000,000	2,000,000
Current and noncurrent receivables, net	'	'	154,000,000	26,000,000
Film and television costs, net	'	'	-40,000,000	726,000,000
Accounts payable and accrued expenses related to trade creditors (cash flow)	'	'	-280,000,000	-198,000,000
Other operating assets and liabilities	'	'	-458,000,000	113,000,000
Net cash provided by operating activities	'	'	1,789,000,000	2,502,000,000
Amortization of film and television costs	'	'	4,959,000,000	4,045,000,000
Additions to film and television costs	'	'	$4,999,000,000	$3,319,000,000

Supplemental_Financial_Informa5

Supplemental Financial Information (Cash Payments for Interest and Income Taxes)(Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest	$541	$515	$1,164	$1,132
Income taxes	1,718	1,761	1,904	2,222
NBCUniversal Media, LLC [Member]	'	'	'	'
Interest	220	204	256	224
Income taxes	$57	$47	$110	$102

Supplemental_Financial_Informa6

Supplemental Financial Information (Noncash Investing and Financing Activities)(Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Dividends payable, amount	$583,000,000
Dividends payable, amount per share	$0.23
Capital expenditures incurred but not yet paid	879,000,000
Fair Value Equity Securities Settlement	1,500,000,000
NBCUniversal Media, LLC [Member]	'
Capital expenditures incurred but not yet paid	$198,000,000

Financial_Data_by_Business_Seg2

Financial Data by Business Segment (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$16,844,000,000	$16,270,000,000	$34,252,000,000	$31,580,000,000
Operating income (loss) before depreciation and amortization	5,804,000,000	5,425,000,000	11,342,000,000	10,459,000,000
Depreciation and amortization	2,000,000,000	1,990,000,000	3,970,000,000	3,957,000,000
Operating income (loss)	3,804,000,000	3,435,000,000	7,372,000,000	6,502,000,000
Capital expenditures	1,798,000,000	1,506,000,000	3,246,000,000	2,867,000,000
Cable segment revenue types as percentage of total cable revenue	100.00%	100.00%	100.00%	100.00%
NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	6,016,000,000	5,995,000,000	12,892,000,000	11,335,000,000
Operating income (loss) before depreciation and amortization	1,434,000,000	1,191,000,000	2,745,000,000	2,144,000,000
Depreciation and amortization	370,000,000	349,000,000	735,000,000	693,000,000
Operating income (loss)	1,064,000,000	842,000,000	2,010,000,000	1,451,000,000
Capital expenditures	298,000,000	260,000,000	589,000,000	523,000,000
Cable Communications [Member]	'	'	'	'
Revenue	11,029,000,000	10,467,000,000	21,786,000,000	20,684,000,000
Operating income (loss) before depreciation and amortization	4,564,000,000	4,335,000,000	8,964,000,000	8,554,000,000
Depreciation and amortization	1,604,000,000	1,623,000,000	3,188,000,000	3,231,000,000
Operating income (loss)	2,960,000,000	2,712,000,000	5,776,000,000	5,323,000,000
Capital expenditures	1,493,000,000	1,240,000,000	2,638,000,000	2,334,000,000
Cable Networks [Member]	'	'	'	'
Revenue	2,476,000,000	2,413,000,000	4,981,000,000	4,638,000,000
Operating income (loss) before depreciation and amortization	914,000,000	860,000,000	1,809,000,000	1,719,000,000
Depreciation and amortization	180,000,000	182,000,000	369,000,000	366,000,000
Operating income (loss)	734,000,000	678,000,000	1,440,000,000	1,353,000,000
Capital expenditures	8,000,000	24,000,000	19,000,000	48,000,000
Cable Networks [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	2,476,000,000	2,413,000,000	4,981,000,000	4,638,000,000
Operating income (loss) before depreciation and amortization	914,000,000	860,000,000	1,809,000,000	1,719,000,000
Depreciation and amortization	180,000,000	182,000,000	369,000,000	366,000,000
Operating income (loss)	734,000,000	678,000,000	1,440,000,000	1,353,000,000
Capital expenditures	8,000,000	24,000,000	19,000,000	48,000,000
Broadcast Television [Member]	'	'	'	'
Revenue	1,816,000,000	1,732,000,000	4,437,000,000	3,249,000,000
Operating income (loss) before depreciation and amortization	240,000,000	206,000,000	362,000,000	171,000,000
Depreciation and amortization	27,000,000	26,000,000	54,000,000	51,000,000
Operating income (loss)	213,000,000	180,000,000	308,000,000	120,000,000
Capital expenditures	26,000,000	9,000,000	37,000,000	17,000,000
Broadcast Television [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	1,816,000,000	1,732,000,000	4,437,000,000	3,249,000,000
Operating income (loss) before depreciation and amortization	240,000,000	206,000,000	362,000,000	171,000,000
Depreciation and amortization	27,000,000	26,000,000	54,000,000	51,000,000
Operating income (loss)	213,000,000	180,000,000	308,000,000	120,000,000
Capital expenditures	26,000,000	9,000,000	37,000,000	17,000,000
Filmed Entertainment [Member]	'	'	'	'
Revenue	1,176,000,000	1,388,000,000	2,527,000,000	2,604,000,000
Operating income (loss) before depreciation and amortization	195,000,000	33,000,000	483,000,000	102,000,000
Depreciation and amortization	5,000,000	3,000,000	10,000,000	7,000,000
Operating income (loss)	190,000,000	30,000,000	473,000,000	95,000,000
Capital expenditures	3,000,000	1,000,000	4,000,000	3,000,000
Goodwill reclassification	'	'	-195,000,000	'
Filmed Entertainment [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	1,176,000,000	1,388,000,000	2,527,000,000	2,604,000,000
Operating income (loss) before depreciation and amortization	195,000,000	33,000,000	483,000,000	102,000,000
Depreciation and amortization	5,000,000	3,000,000	10,000,000	7,000,000
Operating income (loss)	190,000,000	30,000,000	473,000,000	95,000,000
Capital expenditures	3,000,000	1,000,000	4,000,000	3,000,000
Goodwill reclassification	'	'	-195,000,000	'
Theme Parks [Member]	'	'	'	'
Revenue	615,000,000	546,000,000	1,102,000,000	1,008,000,000
Operating income (loss) before depreciation and amortization	244,000,000	231,000,000	414,000,000	404,000,000
Depreciation and amortization	73,000,000	73,000,000	142,000,000	145,000,000
Operating income (loss)	171,000,000	158,000,000	272,000,000	259,000,000
Capital expenditures	158,000,000	147,000,000	302,000,000	285,000,000
Theme Parks [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	615,000,000	546,000,000	1,102,000,000	1,008,000,000
Operating income (loss) before depreciation and amortization	244,000,000	231,000,000	414,000,000	404,000,000
Depreciation and amortization	73,000,000	73,000,000	142,000,000	145,000,000
Operating income (loss)	171,000,000	158,000,000	272,000,000	259,000,000
Capital expenditures	158,000,000	147,000,000	302,000,000	285,000,000
Headquarters And Other [Member]	'	'	'	'
Revenue	4,000,000	9,000,000	6,000,000	18,000,000
Operating income (loss) before depreciation and amortization	-159,000,000	-137,000,000	-322,000,000	-249,000,000
Depreciation and amortization	85,000,000	65,000,000	160,000,000	124,000,000
Operating income (loss)	-244,000,000	-202,000,000	-482,000,000	-373,000,000
Capital expenditures	103,000,000	79,000,000	227,000,000	170,000,000
Headquarters And Other [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	4,000,000	9,000,000	6,000,000	18,000,000
Operating income (loss) before depreciation and amortization	-159,000,000	-137,000,000	-322,000,000	-249,000,000
Depreciation and amortization	85,000,000	65,000,000	160,000,000	124,000,000
Operating income (loss)	-244,000,000	-202,000,000	-482,000,000	-373,000,000
Capital expenditures	103,000,000	79,000,000	227,000,000	170,000,000
NBCUniversal Eliminations [Member]	'	'	'	'
Revenue	-71,000,000	-93,000,000	-161,000,000	-182,000,000
Operating income (loss) before depreciation and amortization	0	-2,000,000	-1,000,000	-3,000,000
Depreciation and amortization	'	'	0	'
Operating income (loss)	0	-2,000,000	-1,000,000	-3,000,000
Capital expenditures	'	'	0	'
NBCUniversal Eliminations [Member] | NBCUniversal Media, LLC [Member]	'	'	'	'
Revenue	-71,000,000	-93,000,000	-161,000,000	-182,000,000
Operating income (loss) before depreciation and amortization	0	-2,000,000	-1,000,000	-3,000,000
Depreciation and amortization	'	'	0	'
Operating income (loss)	0	-2,000,000	-1,000,000	-3,000,000
Capital expenditures	'	'	0	'
NBCUniversal [Member]	'	'	'	'
Revenue	6,016,000,000	5,995,000,000	12,892,000,000	11,335,000,000
Operating income (loss) before depreciation and amortization	1,434,000,000	1,191,000,000	2,745,000,000	2,144,000,000
Depreciation and amortization	370,000,000	349,000,000	735,000,000	693,000,000
Operating income (loss)	1,064,000,000	842,000,000	2,010,000,000	1,451,000,000
Capital expenditures	298,000,000	260,000,000	589,000,000	523,000,000
Corporate and Other [Member]	'	'	'	'
Revenue	172,000,000	136,000,000	346,000,000	298,000,000
Operating income (loss) before depreciation and amortization	-182,000,000	-119,000,000	-335,000,000	-202,000,000
Depreciation and amortization	26,000,000	17,000,000	47,000,000	32,000,000
Operating income (loss)	-208,000,000	-136,000,000	-382,000,000	-234,000,000
Capital expenditures	7,000,000	6,000,000	19,000,000	10,000,000
Eliminations [Member]	'	'	'	'
Revenue	-373,000,000	-328,000,000	-772,000,000	-737,000,000
Operating income (loss) before depreciation and amortization	-12,000,000	18,000,000	-32,000,000	-37,000,000
Depreciation and amortization	'	1,000,000	'	1,000,000
Operating income (loss)	($12,000,000)	$17,000,000	($32,000,000)	($38,000,000)
Cable Communications Segment Revenue Percentage-Video [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	47.50%	49.40%	47.80%	49.70%
Cable Communications Segment Revenue Percentage - High-speed Internet [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	25.60%	24.50%	25.60%	24.60%
Cable Communications Segment Revenue Percentage- Voice [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	8.40%	8.70%	8.50%	8.80%
Cable Communications Segment Revenue Percentage- Business Services [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	8.70%	7.50%	8.60%	7.40%
Cable Communications Segment Revenue Percentage- Advertising [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	5.40%	5.30%	5.10%	5.10%
Cable Communications Segment Revenue Percentage- Other [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	4.40%	4.60%	4.40%	4.40%
Cable Communications Segment Revenue Percentage- Franchise and other regulatory fees [Member]	'	'	'	'
Cable segment revenue types as percentage of total cable revenue	2.80%	2.80%	2.80%	2.90%

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Information (Narrative) (Details) (USD $)	Jun. 30, 2014
Comcast Holdings' ZONES due October 2029 [Member]	'
Principal amount of debt securities subject to guarantee	$185,000,000
Comcast Holdings' ZONES due November 2029 [Member]	'
Principal amount of debt securities not subject to guarantee	62,000,000
NBCUniversal Enterprise Credit Facility	'
Credit facility borrowing capacity	1,350,000,000
NBCUniversal Enterprise [Member]	'
Principal amount of debt securities subject to guarantee	$4,000,000,000

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Cash and cash equivalents	$1,529	$1,718	$1,389	$10,951
Investments [Current]	2,325	3,573	'	'
Receivables, net	6,232	6,376	'	'
Programming rights	905	928	'	'
Other current assets	1,781	1,480	'	'
Total current assets	12,772	14,075	'	'
Film and television costs	5,208	4,994	'	'
Investments	3,072	3,770	'	'
Property and equipment, net	29,970	29,840	'	'
Franchise rights	59,364	59,364	'	'
Goodwill	27,323	27,098	'	'
Other intangible assets, net	17,233	17,329	'	'
Other noncurrent assets, net	2,517	2,343	'	'
Total assets	157,459	158,813	'	'
Accounts payable and accrued expenses related to trade creditors	5,432	5,528	'	'
Accrued participations and residuals	1,364	1,239	'	'
Accrued expenses and other current liabilities [condensed]	7,632	8,865	'	'
Current portion of long-term debt	2,947	3,280	'	'
Total current liabilities	17,375	18,912	'	'
Long-term debt, less current portion	43,602	44,567	'	'
Deferred income taxes	31,854	31,935	'	'
Other noncurrent liabilities	11,241	11,384	'	'
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	1,055	957	'	'
Common stock	30	30	'	'
Other shareholders' equity	51,941	50,664	'	'
Total Comcast Corporation shareholders' equity	51,971	50,694	'	'
Noncontrolling interests	361	364	'	'
Total equity	52,332	51,058	49,486	49,796
Total liabilities and equity	157,459	158,813	'	'
Comcast [Member]	'	'	'	'
Other current assets	227	237	'	'
Total current assets	227	237	'	'
Investments	21	11	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	81,329	79,956	'	'
Property and equipment, net	209	220	'	'
Other intangible assets, net	10	11	'	'
Other noncurrent assets, net	1,179	1,078	'	'
Total assets	82,975	81,513	'	'
Accounts payable and accrued expenses related to trade creditors	11	8	'	'
Accrued expenses and other current liabilities [condensed]	1,501	1,371	'	'
Current portion of long-term debt	900	2,351	'	'
Total current liabilities	2,412	3,730	'	'
Long-term debt, less current portion	26,489	25,170	'	'
Other noncurrent liabilities	2,103	1,919	'	'
Common stock	30	30	'	'
Other shareholders' equity	51,941	50,664	'	'
Total Comcast Corporation shareholders' equity	51,971	50,694	'	'
Total equity	51,971	50,694	'	'
Total liabilities and equity	82,975	81,513	'	'
Comcast Holdings [Member]	'	'	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	100,649	97,429	'	'
Other noncurrent assets, net	148	145	'	'
Total assets	100,797	97,574	'	'
Accrued expenses and other current liabilities [condensed]	283	266	'	'
Total current liabilities	283	266	'	'
Long-term debt, less current portion	132	132	'	'
Deferred income taxes	738	777	'	'
Other shareholders' equity	99,644	96,399	'	'
Total Comcast Corporation shareholders' equity	99,644	96,399	'	'
Total equity	99,644	96,399	'	'
Total liabilities and equity	100,797	97,574	'	'
CCCL Parent [Member]	'	'	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	107,347	102,673	'	'
Total assets	107,347	102,673	'	'
Accrued expenses and other current liabilities [condensed]	193	180	'	'
Total current liabilities	193	180	'	'
Long-term debt, less current portion	1,827	1,827	'	'
Other shareholders' equity	105,327	100,666	'	'
Total Comcast Corporation shareholders' equity	105,327	100,666	'	'
Total equity	105,327	100,666	'	'
Total liabilities and equity	107,347	102,673	'	'
Combined CCHMO Parents [Member]	'	'	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	57,057	54,724	'	'
Total assets	57,057	54,724	'	'
Accrued expenses and other current liabilities [condensed]	47	47	'	'
Total current liabilities	47	47	'	'
Long-term debt, less current portion	1,502	1,505	'	'
Other shareholders' equity	55,508	53,172	'	'
Total Comcast Corporation shareholders' equity	55,508	53,172	'	'
Total equity	55,508	53,172	'	'
Total liabilities and equity	57,057	54,724	'	'
NBCUniversal Media Parent [Member]	'	'	'	'
Cash and cash equivalents	307	336	351	5,129
Investments [Current]	8	'	'	'
Other current assets	35	35	'	'
Total current assets	350	371	'	'
Investments	374	374	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	40,511	40,644	'	'
Other noncurrent assets, net	97	103	'	'
Total assets	41,332	41,492	'	'
Accrued expenses and other current liabilities [condensed]	322	323	'	'
Current portion of long-term debt	1,011	903	'	'
Total current liabilities	1,333	1,226	'	'
Long-term debt, less current portion	9,220	10,236	'	'
Deferred income taxes	59	59	'	'
Other noncurrent liabilities	981	931	'	'
Other shareholders' equity	29,739	29,040	'	'
Total Comcast Corporation shareholders' equity	29,739	29,040	'	'
Total equity	29,739	29,040	'	'
Total liabilities and equity	41,332	41,492	'	'
Comcast Non-Guarantor Subsidiaries [Member]	'	'	'	'
Cash and cash equivalents	1,222	1,382	1,038	5,822
Investments [Current]	2,317	3,573	'	'
Receivables, net	6,232	6,376	'	'
Programming rights	905	928	'	'
Other current assets	1,519	1,208	'	'
Total current assets	12,195	13,467	'	'
Film and television costs	5,208	4,994	'	'
Investments	2,677	3,385	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	91,705	85,164	'	'
Property and equipment, net	29,761	29,620	'	'
Franchise rights	59,364	59,364	'	'
Goodwill	27,323	27,098	'	'
Other intangible assets, net	17,223	17,318	'	'
Other noncurrent assets, net	2,065	1,899	'	'
Total assets	247,521	242,309	'	'
Accounts payable and accrued expenses related to trade creditors	5,421	5,520	'	'
Accrued participations and residuals	1,364	1,239	'	'
Accrued expenses and other current liabilities [condensed]	5,286	6,678	'	'
Current portion of long-term debt	1,036	26	'	'
Total current liabilities	13,107	13,463	'	'
Long-term debt, less current portion	4,432	5,697	'	'
Deferred income taxes	31,885	31,840	'	'
Other noncurrent liabilities	8,301	8,675	'	'
Redeemable noncontrolling interests and redeemable subsidiary preferred stock	1,055	957	'	'
Other shareholders' equity	188,380	181,313	'	'
Total Comcast Corporation shareholders' equity	188,380	181,313	'	'
Noncontrolling interests	361	364	'	'
Total equity	188,741	181,677	'	'
Total liabilities and equity	247,521	242,309	'	'
Elimination and Consolidation Adjustments [Member]	'	'	'	'
Investments in and amounts due from subsidiaries eliminated upon consolidation	-478,598	-460,590	'	'
Other noncurrent assets, net	-972	-882	'	'
Total assets	-479,570	-461,472	'	'
Deferred income taxes	-828	-741	'	'
Other noncurrent liabilities	-144	-141	'	'
Other shareholders' equity	-478,598	-460,590	'	'
Total Comcast Corporation shareholders' equity	-478,598	-460,590	'	'
Total equity	-478,598	-460,590	'	'
Total liabilities and equity	($479,570)	($461,472)	'	'

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Income) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Service revenue	$16,844,000,000	$16,270,000,000	$34,252,000,000	$31,580,000,000
Revenue	16,844,000,000	16,270,000,000	34,252,000,000	31,580,000,000
Programming and production	4,874,000,000	4,968,000,000	10,782,000,000	9,631,000,000
Other operating and administrative	4,924,000,000	4,570,000,000	9,676,000,000	9,036,000,000
Advertising, marketing and promotion	1,242,000,000	1,307,000,000	2,452,000,000	2,454,000,000
Depreciation	1,599,000,000	1,583,000,000	3,168,000,000	3,149,000,000
Amortization	401,000,000	407,000,000	802,000,000	808,000,000
Costs and expenses, total	13,040,000,000	12,835,000,000	26,880,000,000	25,078,000,000
Operating income (loss)	3,804,000,000	3,435,000,000	7,372,000,000	6,502,000,000
Interest expense	-648,000,000	-636,000,000	-1,290,000,000	-1,289,000,000
Investment income (loss), net	120,000,000	13,000,000	233,000,000	85,000,000
Equity in net income (losses) of investees, net	22,000,000	23,000,000	54,000,000	34,000,000
Other income (expense), net	-39,000,000	-43,000,000	-54,000,000	30,000,000
Nonoperating income (Expense), Total	-545,000,000	-643,000,000	-1,057,000,000	-1,140,000,000
Income (loss) before income taxes	3,259,000,000	2,792,000,000	6,315,000,000	5,362,000,000
Income tax (expense) benefit	-1,234,000,000	-1,048,000,000	-2,352,000,000	-1,973,000,000
Net income (loss)	2,025,000,000	1,744,000,000	3,963,000,000	3,389,000,000
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	-33,000,000	-10,000,000	-100,000,000	-218,000,000
Net income (loss) attributable to Parent	1,992,000,000	1,734,000,000	3,863,000,000	3,171,000,000
Comprehensive income attributable to Parent	1,945,000,000	1,822,000,000	3,793,000,000	3,259,000,000
Comcast [Member]	'	'	'	'
Management fee revenue	237,000,000	225,000,000	467,000,000	443,000,000
Revenue	237,000,000	225,000,000	467,000,000	443,000,000
Other operating and administrative	181,000,000	101,000,000	274,000,000	199,000,000
Depreciation	8,000,000	8,000,000	15,000,000	15,000,000
Amortization	2,000,000	2,000,000	3,000,000	3,000,000
Costs and expenses, total	191,000,000	111,000,000	292,000,000	217,000,000
Operating income (loss)	46,000,000	114,000,000	175,000,000	226,000,000
Interest expense	-400,000,000	-383,000,000	787,000,000	-759,000,000
Investment income (loss), net	1,000,000	1,000,000	2,000,000	2,000,000
Equity in net income (losses) of investees, net	2,222,000,000	1,910,000,000	4,260,000,000	3,518,000,000
Other income (expense), net	'	-1,000,000	'	-2,000,000
Nonoperating income (Expense), Total	1,823,000,000	1,527,000,000	3,475,000,000	2,759,000,000
Income (loss) before income taxes	1,869,000,000	1,641,000,000	3,650,000,000	2,985,000,000
Income tax (expense) benefit	123,000,000	93,000,000	213,000,000	186,000,000
Net income (loss)	1,992,000,000	1,734,000,000	3,863,000,000	3,171,000,000
Net income (loss) attributable to Parent	1,992,000,000	1,734,000,000	3,863,000,000	3,171,000,000
Comprehensive income attributable to Parent	1,945,000,000	1,822,000,000	3,793,000,000	3,259,000,000
Comcast Holdings [Member]	'	'	'	'
Interest expense	-3,000,000	-2,000,000	-6,000,000	-5,000,000
Investment income (loss), net	0	6,000,000	3,000,000	3,000,000
Equity in net income (losses) of investees, net	1,908,000,000	1,909,000,000	4,175,000,000	3,651,000,000
Nonoperating income (Expense), Total	1,905,000,000	1,913,000,000	4,172,000,000	3,649,000,000
Income (loss) before income taxes	1,905,000,000	1,913,000,000	4,172,000,000	3,649,000,000
Income tax (expense) benefit	1,000,000	-1,000,000	1,000,000	1,000,000
Net income (loss)	1,906,000,000	1,912,000,000	4,173,000,000	3,650,000,000
Net income (loss) attributable to Parent	1,906,000,000	1,912,000,000	4,173,000,000	3,650,000,000
Comprehensive income attributable to Parent	1,912,000,000	1,905,000,000	4,181,000,000	3,643,000,000
CCCL Parent [Member]	'	'	'	'
Management fee revenue	231,000,000	219,000,000	454,000,000	431,000,000
Revenue	231,000,000	219,000,000	454,000,000	431,000,000
Other operating and administrative	231,000,000	219,000,000	454,000,000	431,000,000
Costs and expenses, total	231,000,000	219,000,000	454,000,000	431,000,000
Interest expense	-44,000,000	-46,000,000	-89,000,000	-124,000,000
Equity in net income (losses) of investees, net	1,774,000,000	1,835,000,000	3,939,000,000	3,598,000,000
Other income (expense), net	'	2,000,000	'	2,000,000
Nonoperating income (Expense), Total	1,730,000,000	1,791,000,000	3,850,000,000	3,476,000,000
Income (loss) before income taxes	1,730,000,000	1,791,000,000	3,850,000,000	3,476,000,000
Income tax (expense) benefit	15,000,000	16,000,000	31,000,000	43,000,000
Net income (loss)	1,745,000,000	1,807,000,000	3,881,000,000	3,519,000,000
Net income (loss) attributable to Parent	1,745,000,000	1,807,000,000	3,881,000,000	3,519,000,000
Comprehensive income attributable to Parent	1,744,000,000	1,808,000,000	3,882,000,000	3,522,000,000
Combined CCHMO Parents [Member]	'	'	'	'
Management fee revenue	145,000,000	137,000,000	286,000,000	270,000,000
Revenue	145,000,000	137,000,000	286,000,000	270,000,000
Other operating and administrative	145,000,000	137,000,000	286,000,000	270,000,000
Costs and expenses, total	145,000,000	137,000,000	286,000,000	270,000,000
Interest expense	-30,000,000	-33,000,000	-59,000,000	-66,000,000
Equity in net income (losses) of investees, net	1,554,000,000	1,349,000,000	3,065,000,000	2,611,000,000
Nonoperating income (Expense), Total	1,524,000,000	1,316,000,000	3,006,000,000	2,545,000,000
Income (loss) before income taxes	1,524,000,000	1,316,000,000	3,006,000,000	2,545,000,000
Income tax (expense) benefit	11,000,000	12,000,000	21,000,000	23,000,000
Net income (loss)	1,535,000,000	1,328,000,000	3,027,000,000	2,568,000,000
Net income (loss) attributable to Parent	1,535,000,000	1,328,000,000	3,027,000,000	2,568,000,000
Comprehensive income attributable to Parent	1,535,000,000	1,328,000,000	3,028,000,000	2,568,000,000
NBCUniversal Media Parent [Member]	'	'	'	'
Other operating and administrative	237,000,000	205,000,000	494,000,000	430,000,000
Costs and expenses, total	237,000,000	205,000,000	494,000,000	430,000,000
Operating income (loss)	-237,000,000	-205,000,000	-494,000,000	-430,000,000
Interest expense	-125,000,000	-123,000,000	-249,000,000	-243,000,000
Investment income (loss), net	4,000,000	5,000,000	5,000,000	1,000,000
Equity in net income (losses) of investees, net	1,171,000,000	951,000,000	2,242,000,000	1,660,000,000
Other income (expense), net	7,000,000	'	3,000,000	'
Nonoperating income (Expense), Total	1,057,000,000	833,000,000	2,001,000,000	1,418,000,000
Income (loss) before income taxes	820,000,000	628,000,000	1,507,000,000	988,000,000
Income tax (expense) benefit	-6,000,000	-5,000,000	-11,000,000	-10,000,000
Net income (loss)	814,000,000	623,000,000	1,496,000,000	978,000,000
Net income (loss) attributable to Parent	814,000,000	623,000,000	1,496,000,000	978,000,000
Comprehensive income attributable to Parent	832,000,000	599,000,000	1,517,000,000	932,000,000
Comcast Non-Guarantor Subsidiaries [Member]	'	'	'	'
Service revenue	16,844,000,000	16,270,000,000	34,252,000,000	31,580,000,000
Revenue	16,844,000,000	16,270,000,000	34,252,000,000	31,580,000,000
Programming and production	4,874,000,000	4,968,000,000	10,782,000,000	9,631,000,000
Other operating and administrative	4,743,000,000	4,489,000,000	9,375,000,000	8,850,000,000
Advertising, marketing and promotion	1,242,000,000	1,307,000,000	2,452,000,000	2,454,000,000
Depreciation	1,591,000,000	1,575,000,000	3,153,000,000	3,134,000,000
Amortization	399,000,000	405,000,000	799,000,000	805,000,000
Costs and expenses, total	12,849,000,000	12,744,000,000	26,561,000,000	24,874,000,000
Operating income (loss)	3,995,000,000	3,526,000,000	7,691,000,000	6,706,000,000
Interest expense	-46,000,000	-49,000,000	-100,000,000	-92,000,000
Investment income (loss), net	115,000,000	1,000,000	223,000,000	79,000,000
Equity in net income (losses) of investees, net	836,000,000	646,000,000	1,550,000,000	1,012,000,000
Other income (expense), net	-46,000,000	-44,000,000	-57,000,000	30,000,000
Nonoperating income (Expense), Total	859,000,000	554,000,000	1,616,000,000	1,029,000,000
Income (loss) before income taxes	4,854,000,000	4,080,000,000	9,307,000,000	7,735,000,000
Income tax (expense) benefit	-1,378,000,000	-1,163,000,000	-2,607,000,000	-2,216,000,000
Net income (loss)	3,476,000,000	2,917,000,000	6,700,000,000	5,519,000,000
Net (income) loss attributable to noncontrolling interests and redeemable subsidiary preferred stock	-33,000,000	-10,000,000	-100,000,000	-218,000,000
Net income (loss) attributable to Parent	3,443,000,000	2,907,000,000	6,600,000,000	5,301,000,000
Comprehensive income attributable to Parent	3,401,000,000	3,007,000,000	6,535,000,000	5,414,000,000
Elimination and Consolidation Adjustments [Member]	'	'	'	'
Management fee revenue	-613,000,000	-581,000,000	-1,207,000,000	-1,144,000,000
Revenue	-613,000,000	-581,000,000	-1,207,000,000	-1,144,000,000
Other operating and administrative	-613,000,000	-581,000,000	-1,207,000,000	-1,144,000,000
Costs and expenses, total	-613,000,000	-581,000,000	-1,207,000,000	-1,144,000,000
Equity in net income (losses) of investees, net	-9,443,000,000	-8,577,000,000	-19,177,000,000	-16,016,000,000
Nonoperating income (Expense), Total	-9,443,000,000	-8,577,000,000	-19,177,000,000	-16,016,000,000
Income (loss) before income taxes	-9,443,000,000	-8,577,000,000	-19,177,000,000	-16,016,000,000
Net income (loss)	-9,443,000,000	-8,577,000,000	-19,177,000,000	-16,016,000,000
Net income (loss) attributable to Parent	-9,443,000,000	-8,577,000,000	-19,177,000,000	-16,016,000,000
Comprehensive income attributable to Parent	($9,424,000,000)	($8,647,000,000)	($19,143,000,000)	($16,079,000,000)

Condensed_Consolidating_Financ5

Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities	'	'
Net cash provided by (used in) operating activities	$7,547,000,000	$7,685,000,000
Investing Activities	'	'
Capital expenditures	-3,246,000,000	-2,867,000,000
Cash paid for intangible assets	-477,000,000	-444,000,000
Acquisitions and construction of real estate properties	-10,000,000	-1,311,000,000
Acquisitions, net of cash acquired	-406,000,000	-22,000,000
Proceeds from sales of businesses and investments	481,000,000	91,000,000
Return of capital from investees	6,000,000	146,000,000
Purchases of investments	-77,000,000	-641,000,000
Other	-159,000,000	88,000,000
Net cash provided by (used in) investing activities	-3,888,000,000	-4,960,000,000
Financing Activities	'	'
Proceeds from (repayments of) short-term borrowings, net	-343,000,000	348,000,000
Proceeds from borrowings	2,187,000,000	2,933,000,000
Repurchases and repayments of debt	-3,163,000,000	-2,195,000,000
Repurchases and retirements of common stock	-1,500,000,000	-1,000,000,000
Dividends paid	-1,092,000,000	-942,000,000
Issuances of common stock	29,000,000	24,000,000
Purchase of NBCUniversal noncontrolling common equity interest	0	-10,761,000,000
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	-117,000,000	-116,000,000
Settlement of Station Venture liability	0	-602,000,000
Other	151,000,000	24,000,000
Net cash provided by (used in) financing activities	-3,848,000,000	-12,287,000,000
Increase (decrease) in cash and cash equivalents	-189,000,000	-9,562,000,000
Cash and cash equivalents, beginning of period	1,718,000,000	10,951,000,000
Cash and cash equivalents, end of period	1,529,000,000	1,389,000,000
Comcast [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	-147,000,000	-181,000,000
Investing Activities	'	'
Net transactions with affiliates	2,674,000,000	-1,301,000,000
Capital expenditures	-4,000,000	-2,000,000
Cash paid for intangible assets	-2,000,000	-1,000,000
Purchases of investments	-10,000,000	-8,000,000
Net cash provided by (used in) investing activities	2,658,000,000	-1,312,000,000
Financing Activities	'	'
Proceeds from (repayments of) short-term borrowings, net	-1,350,000,000	350,000,000
Proceeds from borrowings	2,184,000,000	2,933,000,000
Repurchases and repayments of debt	-1,000,000,000	'
Repurchases and retirements of common stock	-1,500,000,000	-1,000,000,000
Dividends paid	-1,092,000,000	-942,000,000
Issuances of common stock	29,000,000	24,000,000
Other	218,000,000	128,000,000
Net cash provided by (used in) financing activities	-2,511,000,000	1,493,000,000
Comcast Holdings [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	12,000,000	-8,000,000
Investing Activities	'	'
Net transactions with affiliates	-12,000,000	8,000,000
Net cash provided by (used in) investing activities	-12,000,000	8,000,000
CCCL Parent [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	-43,000,000	-120,000,000
Investing Activities	'	'
Net transactions with affiliates	43,000,000	2,217,000,000
Net cash provided by (used in) investing activities	43,000,000	2,217,000,000
Financing Activities	'	'
Repurchases and repayments of debt	'	-2,097,000,000
Net cash provided by (used in) financing activities	'	-2,097,000,000
Combined CCHMO Parents [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	-41,000,000	-47,000,000
Investing Activities	'	'
Net transactions with affiliates	41,000,000	47,000,000
Net cash provided by (used in) investing activities	41,000,000	47,000,000
NBCUniversal Media Parent [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	-711,000,000	-582,000,000
Investing Activities	'	'
Net transactions with affiliates	1,583,000,000	-984,000,000
Proceeds from sales of businesses and investments	2,000,000	'
Return of capital from investees	0	128,000,000
Purchases of investments	-6,000,000	-2,000,000
Other	4,000,000	-10,000,000
Net cash provided by (used in) investing activities	1,583,000,000	-868,000,000
Financing Activities	'	'
Repurchases and repayments of debt	-901,000,000	-88,000,000
Purchase of NBCUniversal noncontrolling common equity interest	'	-3,200,000,000
Other	'	-40,000,000
Net cash provided by (used in) financing activities	-901,000,000	-3,328,000,000
Increase (decrease) in cash and cash equivalents	-29,000,000	-4,778,000,000
Cash and cash equivalents, beginning of period	336,000,000	5,129,000,000
Cash and cash equivalents, end of period	307,000,000	351,000,000
Comcast Non-Guarantor Subsidiaries [Member]	'	'
Operating Activities	'	'
Net cash provided by (used in) operating activities	8,477,000,000	8,623,000,000
Investing Activities	'	'
Net transactions with affiliates	-4,329,000,000	13,000,000
Capital expenditures	-3,242,000,000	-2,865,000,000
Cash paid for intangible assets	-475,000,000	-443,000,000
Acquisitions and construction of real estate properties	-10,000,000	-1,311,000,000
Acquisitions, net of cash acquired	-406,000,000	-22,000,000
Proceeds from sales of businesses and investments	479,000,000	91,000,000
Return of capital from investees	6,000,000	18,000,000
Purchases of investments	-61,000,000	-631,000,000
Other	-163,000,000	98,000,000
Net cash provided by (used in) investing activities	-8,201,000,000	-5,052,000,000
Financing Activities	'	'
Proceeds from (repayments of) short-term borrowings, net	1,007,000,000	-2,000,000
Proceeds from borrowings	3,000,000	'
Repurchases and repayments of debt	-1,262,000,000	-10,000,000
Purchase of NBCUniversal noncontrolling common equity interest	'	-7,561,000,000
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	-117,000,000	-116,000,000
Settlement of Station Venture liability	'	-602,000,000
Other	-67,000,000	-64,000,000
Net cash provided by (used in) financing activities	-436,000,000	-8,355,000,000
Increase (decrease) in cash and cash equivalents	-160,000,000	-4,784,000,000
Cash and cash equivalents, beginning of period	1,382,000,000	5,822,000,000
Cash and cash equivalents, end of period	$1,222,000,000	$1,038,000,000