Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net income	$ 9,280	$ 7,871
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other operating gains	7,479	7,079
Share-based compensation	607	594
Noncash interest expense (income), net	289	187
Net (gain) loss on investment activity and other	118	(133)
Deferred income taxes	877	681
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Current and noncurrent receivables, net	(225)	123
Film and television costs, net	64	(71)
Accounts payable and accrued expenses related to trade creditors	(85)	(20)
Other operating assets and liabilities	103	(454)
Net cash provided by operating activities	18,507	15,857
Investing Activities
Capital expenditures	(6,607)	(6,839)
Cash paid for intangible assets	(1,375)	(1,136)
Acquisitions and construction of real estate properties	(129)	(325)
Construction of Universal Beijing Resort	(257)	(47)
Acquisitions, net of cash acquired	(88)	(429)
Proceeds from sales of investments	127	120
Purchases of investments	(840)	(2,064)
Other	579	797
Net cash provided by (used in) investing activities	(8,590)	(9,923)
Financing Activities
Proceeds from (repayments of) short-term borrowings, net	2,909	(2,807)
Proceeds from borrowings	9,850	11,460
Repurchases and repayments of debt	(4,405)	(5,021)
Repurchases of common stock under repurchase program and employee plans	(4,282)	(4,212)
Dividends paid	(2,487)	(2,147)
Purchase of Universal Studios Japan noncontrolling interests	0	(2,299)
Distributions to noncontrolling interests and dividends for redeemable subsidiary preferred stock	(209)	(198)
Other	(242)	103
Net cash provided by (used in) financing activities	1,134	(5,121)
Increase (decrease) in cash, cash equivalents and restricted cash	11,051	813
Cash, cash equivalents and restricted cash, beginning of period	3,571	3,415
Cash, cash equivalents and restricted cash, end of period	14,622	4,228
NBCUniversal Media LLC [Member]
Operating Activities
Net income	4,013	4,390
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other operating gains	1,436	1,198
Net (gain) loss on investment activity and other	497	125
Deferred income taxes	21	(6)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Current and noncurrent receivables, net	90	247
Film and television costs, net	69	(77)
Accounts payable and accrued expenses related to trade creditors	(123)	(270)
Other operating assets and liabilities	(165)	(35)
Net cash provided by operating activities	5,838	5,572
Investing Activities
Capital expenditures	(1,135)	(977)
Cash paid for intangible assets	(374)	(197)
Note receivable from Comcast	(1,522)	0
Construction of Universal Beijing Resort	(257)	(47)
Purchases of investments	(450)	(368)
Other	(45)	566
Net cash provided by (used in) investing activities	(3,783)	(1,023)
Financing Activities
Proceeds from borrowings	485	3,948
Repurchases and repayments of debt	(387)	(3,450)
Proceeds from (repayments of) borrowings from Comcast, net	(1,791)	(898)
Distributions to member	(1,228)	(1,720)
Distributions to noncontrolling interests	(163)	(165)
Purchase of Universal Studios Japan noncontrolling interests	0	(2,299)
Other	(147)	86
Net cash provided by (used in) financing activities	(3,231)	(4,498)
Increase (decrease) in cash, cash equivalents and restricted cash	(1,176)	51
Cash, cash equivalents and restricted cash, beginning of period	2,377	1,987
Cash, cash equivalents and restricted cash, end of period	$ 1,201	$ 2,038