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Stockholders' Equity - Rollforward (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 31, 2020 | Mar. 31, 2019 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance (in shares) |  |  |  | (85,308,386) |  |  | (85,308,386) |
Beginning balance |  |  | $ 8,669,294 | $ 8,840,382 | $ 8,424,788 | $ 7,219,279 | $ 8,840,382 | $ 7,219,279
Net income |  |  | 133,350 | 118,957 | 143,852 | 117,747 | $ 252,307 | 261,599
Other comprehensive loss |  |  | 66,380 | (272,067) | (16,092) | 3,344 |  |
Issuance of common stock and release of treasury stock for employee equity awards |  |  | 0 | 30,390 | 0 | 27,593 |  |
Issuance of common stock (in shares) | 2,587,500 | 2,985,575 |  |  |  |  |  |
Issuance of common stock | $ 1,683,100 | $ 1,213,400 |  |  |  |  |  |
Dividend distribution on common stock |  |  | (235,334) | (227,387) | (207,949) | (198,933) |  |
Settlement of accrued dividends on vested equity awards |  |  | (44) | (294) | (21) | (103) |  |
Accrued dividends on unvested equity awards |  |  | (4,136) | (3,268) | (2,972) | (2,395) |  |
Stock-based compensation, net of estimated forfeitures |  |  | $ 75,642 | 81,690 | 59,502 | 50,795 |  |
Ending balance (in shares) |  |  | (88,549,394) |  |  |  | (88,549,394) |
Ending balance |  | 8,424,788 | $ 10,388,258 | 8,669,294 | 8,749,229 | 8,424,788 | $ 10,388,258 | 8,749,229
Equinix Stockholders' Equity |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 8,669,364 | 8,840,606 | 8,425,112 | 7,219,279 | 8,840,606 | 7,219,279
Net income |  |  | 133,304 | 118,792 | 143,527 | 118,078 |  |
Other comprehensive loss |  |  | 66,378 | (272,056) | (16,078) | 3,337 |  |
Issuance of common stock and release of treasury stock for employee equity awards |  |  |  | 30,390 |  | 27,593 |  |
Dividend distribution on common stock |  |  | (235,334) | (227,387) | (207,949) | (198,933) |  |
Settlement of accrued dividends on vested equity awards |  |  | (44) | (294) | (21) | (103) |  |
Accrued dividends on unvested equity awards |  |  | (4,136) | (3,268) | (2,972) | (2,395) |  |
Stock-based compensation, net of estimated forfeitures |  |  | 75,642 | 81,690 | 59,502 | 50,795 |  |
Ending balance |  | $ 8,425,112 | $ 10,388,280 | $ 8,669,364 | $ 8,749,242 | $ 8,425,112 | $ 10,388,280 | $ 8,749,242
Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance (in shares) |  |  | (86,269,033) | (85,700,953) | (84,465,156) | (81,119,117) | (85,700,953) | (81,119,117)
Beginning balance |  |  | $ 86 | $ 86 | $ 84 | $ 81 | $ 86 | $ 81
Issuance of common stock and release of treasury stock for employee equity awards (in shares) |  |  | 34,146 | 405,550 | 26,435 | 360,464 |  |
Ending balance (in shares) |  | (84,465,156) | (88,890,679) | (86,269,033) | (85,213,952) | (84,465,156) | (88,890,679) | (85,213,952)
Ending balance |  | $ 84 | $ 89 | $ 86 | $ 85 | $ 84 | $ 89 | $ 85
Treasury Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance (in shares) |  |  | (341,973) | (392,567) | (395,153) | (396,859) | (392,567) | (396,859)
Beginning balance |  |  | $ (127,298) | $ (144,256) | $ (144,801) | $ (145,161) | $ (144,256) | $ (145,161)
Issuance of common stock and release of treasury stock for employee equity awards (in shares) |  |  | 688 | 50,594 | 359 | 1,706 |  |
Issuance of common stock and release of treasury stock for employee equity awards |  |  | $ 256 | $ 16,958 | $ 76 | $ 360 |  |
Ending balance (in shares) |  | (395,153) | (341,285) | (341,973) | (394,794) | (395,153) | (341,285) | (394,794)
Ending balance |  | $ (144,801) | $ (127,042) | $ (127,298) | $ (144,725) | $ (144,801) | $ (127,042) | $ (144,725)
Additional Paid-in Capital |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 12,893,455 | 12,696,433 | 12,043,056 | 10,751,313 | 12,696,433 | 10,751,313
Issuance of common stock and release of treasury stock for employee equity awards |  |  | (256) | 13,432 | (76) | 27,233 |  |
Settlement of accrued dividends on vested equity awards |  |  | 0 | 109 | 12 | 284 |  |
Stock-based compensation, net of estimated forfeitures |  |  | 75,642 | 81,690 | 59,502 | 50,795 |  |
Ending balance |  | 12,043,056 | 14,651,944 | 12,893,455 | 12,450,614 | 12,043,056 | 14,651,944 | 12,450,614
Accumulated Dividends |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | (4,399,527) | (4,168,469) | (3,532,915) | (3,331,200) | (4,168,469) | (3,331,200)
Dividend distribution on common stock |  |  | (235,334) | (227,387) | (207,949) | (198,933) |  |
Settlement of accrued dividends on vested equity awards |  |  | (44) | (403) | (33) | (387) |  |
Accrued dividends on unvested equity awards |  |  | (4,136) | (3,268) | (2,972) | (2,395) |  |
Ending balance |  | (3,532,915) | (4,639,041) | (4,399,527) | (3,743,869) | (3,532,915) | (4,639,041) | (3,743,869)
AOCI (Loss) |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | (1,206,669) | (934,613) | (942,365) | (945,702) | (934,613) | (945,702)
Other comprehensive loss |  |  | 66,378 | (272,056) | (16,078) | 3,337 | (205,678) |
Ending balance |  | (942,365) | (1,140,291) | (1,206,669) | (958,443) | (942,365) | (1,140,291) | (958,443)
Retained Earnings |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,509,317 | 1,391,425 | 1,002,053 | 889,948 | 1,391,425 | 889,948
Net income |  |  | 133,304 | 118,792 | 143,527 | 118,078 |  |
Ending balance |  | 1,002,053 | 1,642,621 | 1,509,317 | 1,145,580 | 1,002,053 | 1,642,621 | 1,145,580
Noncontrolling Interests |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | (70) | (224) | (324) | 0 | (224) | 0
Net income |  |  | 46 | 165 | 325 | (331) |  |
Other comprehensive loss |  |  | 2 | (11) | (14) | 7 |  |
Ending balance |  | $ (324) | (22) | (70) | (13) | (324) | (22) | (13)
Cumulative adjustment due to adoption of ASU |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | (900) |  | (5,973) | (900) | (5,973)
Cumulative adjustment due to adoption of ASU | Equinix Stockholders' Equity |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | (900) |  | (5,973) | (900) | (5,973)
Cumulative adjustment due to adoption of ASU | Retained Earnings |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  | (900) |  | (5,973) | $ (900) | $ (5,973)
Public Offering |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock |  |  | 1,683,106 |  |  | 1,213,434 |  |
Public Offering | Equinix Stockholders' Equity |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock |  |  | $ 1,683,106 |  |  | $ 1,213,434 |  |
Public Offering | Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  | 2,587,500 |  |  | 2,985,575 |  |
Issuance of common stock |  |  | $ 3 |  |  | $ 3 |  |
Public Offering | Additional Paid-in Capital |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock |  |  | $ 1,683,103 |  |  | $ 1,213,431 |  |
ATM Program |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  | 162,530 | 722,361
Issuance of common stock |  |  |  | 101,791 | 348,121 |  | $ 101,800 | $ 348,200
ATM Program | Equinix Stockholders' Equity |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  | $ 101,791 | $ 348,121 |  |  |
ATM Program | Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  | 162,530 | 722,361 |  |  |
Issuance of common stock |  |  |  |  | $ 1 |  |  |
ATM Program | Additional Paid-in Capital |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  | $ 101,791 | $ 348,120 |  |  |

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