Condensed Consolidated Statement of Changes in Equity (Unaudited) - USD ($) $ in Millions |
Total |
Redeemable Noncontrolling Interests And Redeemable Subsidiary Preferred Stock [Member] |
Additional Paid-in Capital [Member] |
Retained Earnings [Member] |
Treasury Stock at Cost [Member] |
Accumulated Other Comprehensive Income (Loss) [Member] |
Noncontrolling Interest [Member] |
NBCUniversal Media LLC [Member] |
NBCUniversal Media LLC [Member]
Redeemable Noncontrolling Interest [Member]
|
NBCUniversal Media LLC [Member]
Member's Capital [Member]
|
NBCUniversal Media LLC [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
|
NBCUniversal Media LLC [Member]
Noncontrolling Interest [Member]
|
Class A Common Stock [Member]
Common Stock [Member]
|
Class B Common Stock [Member]
Common Stock [Member]
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance at Dec. 31, 2015 | $ 34,303 | $ 32,834 | $ (212) | $ 1,681 | ||||||||||
| Beginning balance at Dec. 31, 2015 | $ 53,978 | $ 38,490 | $ 21,413 | $ (7,517) | $ (174) | $ 1,709 | $ 57 | $ 0 | ||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||
| Stock compensation plans | 228 | 228 | ||||||||||||
| Repurchases of common stock under repurchase program and employee plans | (1,437) | (310) | (1,127) | |||||||||||
| Employee stock purchase plans | 33 | 33 | ||||||||||||
| Dividends declared | (670) | (670) | (195) | (195) | ||||||||||
| Contributions from (distributions to) noncontrolling interests, net | (36) | (36) | (41) | (41) | ||||||||||
| Other comprehensive income (loss) | 227 | 90 | 137 | 281 | 144 | 137 | ||||||||
| Other | (5) | (5) | 1 | 1 | ||||||||||
| Net income (loss) | 2,194 | 2,134 | 60 | 1,063 | 1,002 | 61 | ||||||||
| Ending balance at Mar. 31, 2016 | 54,512 | 38,436 | 21,750 | (7,517) | (84) | 1,870 | 57 | 0 | ||||||
| Ending balance at Mar. 31, 2016 | 35,412 | 33,642 | (68) | 1,838 | ||||||||||
| Beginning balance at Dec. 31, 2015 | $ 1,221 | $ 372 | ||||||||||||
| Increase (Decrease) in Temporary Equity [Roll Forward] | ||||||||||||||
| Contributions from (distributions to) noncontrolling interests, net | (5) | (22) | ||||||||||||
| Other | (10) | |||||||||||||
| Net income (loss) | 30 | 19 | ||||||||||||
| Ending balance at Mar. 31, 2016 | 1,236 | 369 | ||||||||||||
| Beginning balance at Dec. 31, 2016 | 41,017 | 39,036 | (135) | 2,116 | ||||||||||
| Beginning balance at Dec. 31, 2016 | 56,174 | 38,230 | 23,076 | (7,517) | 98 | 2,231 | 56 | 0 | ||||||
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||||||||||
| Stock compensation plans | 114 | 114 | ||||||||||||
| Repurchases of common stock under repurchase program and employee plans | (1,006) | (178) | (828) | |||||||||||
| Employee stock purchase plans | 39 | 39 | ||||||||||||
| Dividends declared | (751) | (751) | (195) | (195) | ||||||||||
| Contributions from (distributions to) noncontrolling interests, net | (34) | (34) | (41) | (41) | ||||||||||
| Contribution from member | 662 | 662 | ||||||||||||
| Other comprehensive income (loss) | 331 | 244 | 87 | 293 | 206 | 87 | ||||||||
| Other | 163 | (90) | 253 | 342 | 89 | 253 | ||||||||
| Net income (loss) | 2,618 | 2,566 | 52 | 1,255 | 1,200 | 55 | ||||||||
| Ending balance at Mar. 31, 2017 | 57,648 | $ 38,115 | $ 24,063 | $ (7,517) | $ 342 | $ 2,589 | $ 56 | $ 0 | ||||||
| Ending balance at Mar. 31, 2017 | 43,333 | $ 40,792 | $ 71 | $ 2,470 | ||||||||||
| Beginning balance at Dec. 31, 2016 | 1,446 | 1,446 | 530 | 530 | ||||||||||
| Increase (Decrease) in Temporary Equity [Roll Forward] | ||||||||||||||
| Contributions from (distributions to) noncontrolling interests, net | (8) | (20) | ||||||||||||
| Other | (11) | (1) | ||||||||||||
| Net income (loss) | 29 | 18 | ||||||||||||
| Ending balance at Mar. 31, 2017 | $ 1,456 | $ 1,456 | $ 527 | $ 527 |