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Change in Accounting Principle - Statements of Shareholders' Equity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jan. 01, 2019 | Dec. 31, 2018 | Jan. 01, 2018 | [3]
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  |  |  |  | $ 2,092 |  |  |  |  |  |
Net loss attributable to Chesapeake |  | $ 98 | $ (249) | [1] | 77 | [1] | $ (232) | [1] |  |  |
Chesapeake stockholders’ equity, end of period |  | 4,191 |  |  | 4,191 |  |  |  |  |  |
Stockholders' equity attributable to noncontrolling interest, beginning of period |  |  |  |  | 41 |  |  |  |  |  |
Net income attributable to noncontrolling interests |  | 0 | 0 | [2] | 0 | [2] | (1) | [2] |  |  |
Stockholders' equity attributable to noncontrolling interest, end of period |  | 39 |  |  | 39 |  |  |  |  |  |
TOTAL EQUITY |  | 4,230 | 1,689 | [3] | 4,230 |  | 1,689 | [3] |  | $ 2,133 |
PREFERRED STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period | [3] | 1,671 | 1,671 |  | 1,671 |  | 1,671 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 1,671 | 1,671 | [3] | 1,671 |  | 1,671 | [3] |  |  |
COMMON STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 16 | 9 | [3] | 9 |  | 9 | [3] |  |  |
Common shares issued for WildHorse Merger |  | 0 | 0 | [3] | 7 |  | 0 | [3] |  |  |
Chesapeake stockholders’ equity, end of period | [3] | 16 | 9 |  | 16 |  | 9 |  |  |  |
ADDITIONAL PAID-IN CAPITAL |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 16,392 | 14,419 | [3] | 14,378 |  | 14,437 | [3] |  |  |
Common shares issued for WildHorse Merger |  | 0 | 0 | [3] | 2,030 |  | 0 | [3] |  |  |
Stock-based compensation |  | 11 | 12 | [3] | 18 |  | 17 | [3] |  |  |
Dividends on preferred stock |  | (23) | (23) | [3] | (46) |  | (46) | [3] |  |  |
Chesapeake stockholders’ equity, end of period |  | 16,380 | 14,408 | [3] | 16,380 |  | 14,408 | [3] |  |  |
ACCUMULATED DEFICIT |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (13,933) | (14,121) | [3] | (13,912) |  | (14,130) | [3] |  |  |
Net loss attributable to Chesapeake |  | 98 | (249) | [3] | 77 |  | (232) | [3] |  |  |
Cumulative effect of accounting change |  |  |  |  |  |  |  |  | $ 0 |  | $ (8)
Chesapeake stockholders’ equity, end of period | [3] | (13,835) | (14,370) |  | (13,835) |  | (14,370) |  |  |  |
ACCUMULATED OTHER COMPREHENSIVE LOSS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (13) | (47) | [3] | (23) |  | (57) | [3] |  |  |
Hedging activity |  | 8 | 7 | [3] | 18 |  | 17 | [3] |  |  |
Chesapeake stockholders’ equity, end of period |  | (5) | (40) | [3] | (5) |  | (40) | [3] |  |  |
TREASURY STOCK – COMMON: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (36) | (32) | [3] | (31) |  | (31) | [3] |  |  |
Purchase of 81,093, 17,046, 2,620,566, and 1,468,524 shares for company benefit plans |  | (1) | 0 | [3] | (7) |  | (4) | [3] |  |  |
Release of 148,767, 114,450, 259,563 and 389,857 shares from company benefit plans |  | 1 | 1 | [3] | 2 |  | 4 | [3] |  |  |
Chesapeake stockholders’ equity, end of period |  | $ (36) | $ (31) | [3] | $ (36) |  | $ (31) | [3] |  |  |
Purchase of shares for company benefit plans (in shares) |  | 81,093 | 17,046 |  | 2,620,566 |  | 1,468,524 |  |  |  |
Release of shares from company benefit plans (in shares) |  | 148,767 | 114,450 |  | 259,563 |  | 389,857 |  |  |  |
TOTAL CHESAPEAKE STOCKHOLDERS’ EQUITY |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, end of period |  | $ 4,191 | $ 1,647 | [3] | $ 4,191 |  | $ 1,647 | [3] |  |  |
NONCONTROLLING INTERESTS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Stockholders' equity attributable to noncontrolling interest, beginning of period |  | 41 | 43 | [3] | 41 |  | 44 | [3] |  |  |
Net income attributable to noncontrolling interests |  | 0 | 0 | [3] | 0 |  | 1 | [3] |  |  |
Distributions to noncontrolling interest owners |  | (2) | (1) | [3] | (2) |  | (3) | [3] |  |  |
Stockholders' equity attributable to noncontrolling interest, end of period |  | 39 | 42 | [3] | 39 |  | 42 | [3] |  |  |
Under Full Cost |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to Chesapeake |  |  | (17) |  | 489 |  | 276 |  |  |  |
Net income attributable to noncontrolling interests |  | 0 | (1) |  | (1) |  | (2) |  |  |  |
TOTAL EQUITY |  | 2,975 | (117) |  | 2,975 |  | (117) |  |  |  |
Under Full Cost | PREFERRED STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 1,671 | 1,671 |  | 1,671 |  | 1,671 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 1,671 | 1,671 |  | 1,671 |  | 1,671 |  |  |  |
Under Full Cost | COMMON STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 16 | 9 |  | 9 |  | 9 |  |  |  |
Common shares issued for WildHorse Merger |  |  |  |  | 7 |  |  |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 16 | 9 |  | 16 |  | 9 |  |  |  |
Under Full Cost | ADDITIONAL PAID-IN CAPITAL |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 16,392 | 14,419 |  | 14,378 |  | 14,437 |  |  |  |
Common shares issued for WildHorse Merger |  |  |  |  | 2,030 |  |  |  |  |  |
Stock-based compensation |  | 11 | 12 |  | 18 |  | 17 |  |  |  |
Dividends on preferred stock |  | (23) | (23) |  | (46) |  | (46) |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 16,380 | 14,408 |  | 16,380 |  | 14,408 |  |  |  |
Under Full Cost | ACCUMULATED DEFICIT |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (15,481) | (16,240) |  | (15,660) |  | (16,525) |  |  |  |
Net loss attributable to Chesapeake |  | 310 | (17) |  |  |  | 276 |  |  |  |
Cumulative effect of accounting change |  |  | (8) |  |  |  | (8) |  |  |  |
Chesapeake stockholders’ equity, end of period |  | (15,171) | (16,257) |  | (15,171) |  | (16,257) |  |  |  |
Under Full Cost | ACCUMULATED OTHER COMPREHENSIVE LOSS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (13) | (47) |  | (23) |  | (57) |  |  |  |
Hedging activity |  | 8 | 7 |  | 18 |  | 17 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | (5) | (40) |  | (5) |  | (40) |  |  |  |
Under Full Cost | TREASURY STOCK – COMMON: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | (36) | (32) |  | (31) |  | (31) |  |  |  |
Purchase of 81,093, 17,046, 2,620,566, and 1,468,524 shares for company benefit plans |  | (1) | 0 |  | (7) |  | (4) |  |  |  |
Release of 148,767, 114,450, 259,563 and 389,857 shares from company benefit plans |  | 1 | 1 |  | 2 |  | 4 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | (36) | (31) |  | (36) |  | (31) |  |  |  |
Under Full Cost | TOTAL CHESAPEAKE STOCKHOLDERS’ EQUITY |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 2,855 | (240) |  | 2,855 |  | (240) |  |  |  |
Under Full Cost | NONCONTROLLING INTERESTS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Stockholders' equity attributable to noncontrolling interest, beginning of period |  | 122 | 123 |  | 123 |  | 124 |  |  |  |
Net income attributable to noncontrolling interests |  | 0 | 1 |  | (1) |  | 2 |  |  |  |
Distributions to noncontrolling interest owners |  | (2) | (1) |  | (2) |  | (3) |  |  |  |
Stockholders' equity attributable to noncontrolling interest, end of period |  | 120 | 123 |  | 120 |  | 123 |  |  |  |
Successful Efforts Adjustment |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to Chesapeake |  | (212) | (232) |  | (412) |  | (508) |  |  |  |
Net income attributable to noncontrolling interests |  | 0 | 1 |  | 1 |  | 1 |  |  |  |
TOTAL EQUITY |  | 1,255 | 1,806 |  | 1,255 |  | 1,806 |  |  |  |
Successful Efforts Adjustment | PREFERRED STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Successful Efforts Adjustment | COMMON STOCK |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Common shares issued for WildHorse Merger |  |  |  |  | 0 |  |  |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Successful Efforts Adjustment | ADDITIONAL PAID-IN CAPITAL |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Common shares issued for WildHorse Merger |  |  |  |  | 0 |  |  |  |  |  |
Stock-based compensation |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Dividends on preferred stock |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Successful Efforts Adjustment | ACCUMULATED DEFICIT |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 1,548 | 2,119 |  | 1,748 |  | 2,395 |  |  |  |
Net loss attributable to Chesapeake |  | (212) | (232) |  |  |  | (508) |  |  |  |
Cumulative effect of accounting change |  |  | 0 |  |  |  | 0 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 1,336 | 1,887 |  | 1,336 |  | 1,887 |  |  |  |
Successful Efforts Adjustment | ACCUMULATED OTHER COMPREHENSIVE LOSS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Hedging activity |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Successful Efforts Adjustment | TREASURY STOCK – COMMON: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, beginning of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Purchase of 81,093, 17,046, 2,620,566, and 1,468,524 shares for company benefit plans |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Release of 148,767, 114,450, 259,563 and 389,857 shares from company benefit plans |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Successful Efforts Adjustment | TOTAL CHESAPEAKE STOCKHOLDERS’ EQUITY |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Chesapeake stockholders’ equity, end of period |  | 1,336 | 1,887 |  | 1,336 |  | 1,887 |  |  |  |
Successful Efforts Adjustment | NONCONTROLLING INTERESTS: |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Stockholders' equity attributable to noncontrolling interest, beginning of period |  | (81) | (80) |  | (82) |  | (80) |  |  |  |
Net income attributable to noncontrolling interests |  | 0 | (1) |  | 1 |  | (1) |  |  |  |
Distributions to noncontrolling interest owners |  | 0 | 0 |  | 0 |  | 0 |  |  |  |
Stockholders' equity attributable to noncontrolling interest, end of period |  | $ (81) | $ (81) |  | $ (81) |  | $ (81) |  |  |  |
[1] | Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.
[2] | Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.
[3] | Financial information for prior periods has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.

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